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[Adams, Douglas K General Electric Co., P.O. Box 2331, Denver 1, Colo. Alger, Van Kaiser Steel, Sunnyside, Utah Allan,-Andrew Thompson Creek Coal & Coke Corp., Glenwood Springs, Colo. Allen, Earl W Mine Safety Appliances Co., 257 Rio Grand St., Salt Lake City, Utah Allen, John P Development & Resources Corp., 50 Broadway, N. Y. 4, N. Y. Allen, Thomas Chief State Coal Mine Inspector, State Services Bldg., Denver, Colo. Alston, George L Mine Safety Appliances Co., 201 N. Braddock, Pittsburgh 8, Pa. Anderson, Nephi W Book Cliffs Coal Co., Dragerton, Utah Anderson, W. J Texaco, Inc., 845 N. 5th E., Price, Utah Ankeny, Marling J U. S. Bureau of Mines, 5308 Roosevelt St., Bethesda, Md. Archer, Bryon J., Jr Peabody Coal Co., 421 Glenwood St., Grand Junction, Colo. Arentzen, E. M Lee-Norse Co., Charleroi, Pa. Arentzen, L. E Lee-Norse Co., 2975 18th St., Boulder, Colo. Artis, Cliff E Big Horn Coal Co., 247 Sherman Ave., Sheridan, Wyo. Atchison, Lee Atchison Construction Co., Drawer D, Aztec, N. Mex.]

Jan 1, 1963

Pictured on these pages are the eight RMCMI Scholarship Award Winners for the 1990-1991 year followed by a brief profile. All winners, except John Nixon from Texas, were present as guests of the Institute at the June convention in Keystone, Colorado to receive recognition at the Welcome Session Monday, July 1, 1991. Each state vice president served as the host for the collegiate winner. In addition to receiving a plaque from the Scholarship Chairman, Dr. Donald Gentry, each winner receives $750 tuition credit for the coming academic year. As this is a continuing award, the winners from the previous year will receive another $750 for tuition credit in their senior year if they have maintained good academic standing and are recommended by their university. Criteria for these awards to be made in the spring annually is (1) That the award be made to a sophomore student and used as tuition during the junior year. (2) That the recipient be both a U.S. citizen and a resident of the state involved. (3) That the recipient have good academic standing, be pursuing a degree in a mining related field and have an expressed interest in Western coal as a possible career path. The scholarship program includes curricula other than those in the mining departments, but in the engineering disciplines, such as geology, mineral processing and metallurgy. Contributions to this worthy project are tax deductible to each individual RMCMI member or his firm. Through annual donations of $100 or more, the Patrons of the Institute fund the scholarship program and the various vice presidents contribute the travel expenses to conventions for these outstanding young collegiates. Donations to this worthwhile program may be made payable to RMCMI Scholar- ship and mailed to the RMCMI Office, 3000 Youngfield Street, Suite 324, Lakewood, CO 80215. Profiles of the 1991 Scholarship Winners follow. [ ] Walter Mengel III University of Arizona Tucson, Arizona Walter has attended the Mining Engineering program at University of Arizona since fall, 1990. He is a very diligent student and has recently been selected student mine foreman for the San Xavier Mine. Walter is secretary of the U. of A. AIME Student Chapter and a student member of the AIME Tucson Chapter. His career interests lean towards western coal mining. [ ] Matthew Madden Colorado School of Mines Golden, CO Matt carries a 2.619 cumulative grade point average in the Mining Engineering Department and ranks 194 in a class of 440. He is involved in a number of school activites such as a member of the Society for Mining, Metallurgy and Exploration, Inc., member of the Resident Hall Association, a Admissions Ambassador, and will be a Resident Hall Director for 1991-1992. Matt is also involved in wrestling and received a Colorado School of Mines Athletic Scholarship in 1990.

Jan 1, 1991

(The following discussion took place on this screen lecture in the dark.) MR. SHUBART: Would you give us a little .explanation as to the operation of this machine and what you are doing with it? MR. TESCHER: There is a 20- horsepower motor, rheostat, crusher, and a fan mounted on one base plate and operating on one shaft. The fan is overhung on the shaft. The only bearings you have are the bearings on each side of the crusher and the motor hearings. On one side of the ma- chine there is an opening for feeding shale. The machine is operated at 1,200 revolution per minute and as the shale is pulverized, the fan automatically exhausts fine dust from the crusher from an opening in the top of the crusher. The machine pulverizes 3,000 pounds in eight hours, reducing the materid to one hundred mesh. The last ma- chine we put in has been operating continuously fifteen hours a day for the past sixty days, without repairs of any kind. PRESIDENT LITTLEJOHN: Where is the machine in operation? MR. TESCHER. At the Royal mine. We have used ordinary mining ma- chine cable in local movements of the machines. This has enabled us to have twenty-two locations throughout the mines. The mine is highly gaesous, and the machines had to be placed on intake air. MR. SHUBSRT: What type of crusher do you use? MR. TESCHER. A No. 16 Universal, operating at 1,200 revolution per minute. M. SHURART: What material do you feed to it? MR. TESCHER: We have shale three-quarters of a mile from the mine. In the winter months we have been troubled with moisture. We build a kiln and get this shale and load it into the kiln for drying and then place it into a pit car and take it into the mine. The material must be dry. We have also used slate in the mine and have had good success. The slate at the mine is fairly hard. I presume, however, that the slate will probably carry a high silica content. MR. SHUBART: Mr. Harrington claims that silica does not do the harm, as was formerly supposed. MR. TESCHER: There is still a question as to whether it is harmful or not. PRESIDENT LITTLEJOHN: Are there any of these machines in operation closer than Aguilar? MR. TESCHER: There is one at the Alamo mine. Mr. Quealy also purchased a couple of them for use at his Wyoming mines. PRESIDENT LITTLEJOHN: Are there any other questions you would like to ask Mr. Tescher regarding his rock dusting machine while it is on the table for discussion? MR. DALRYMPLE, SR.: How many men does it take to operate it? MR. TESCHER: One man operates the machine. Sometimes we put the

Jan 1, 1925

By D. J. Griffiths

Beyond doubt it is practically impossible to eliminate all chances of accidents from falls. Mother Earth is not going to give up her treasures without some sacrificing on our part. This particular question ranks among the important subjects connected with coal-mining, and has been given less attention as a factor of life- and limb-destroyer than any other cause. The single fatalities which happen create very little attention; nevertheless, when counted up at the end of the year, they outnumber the unfortunate ones that are mowed down by the wholesale by mine explosions. Fire-damp and coal dust were often considered the greatest evils in coal-mining. All records, however, prove this conclusion to be wrong. The second annual report of the Bureau of Mines gives the loss of life caused by falls of coal and roof in 1910 as 1,310, and in 1911 as 1,321. The reports of Pennsylvania mine inspectors for a period of thirty-three years show that 59.38 per cent of all the accidents underground were caused by falls of roof and coal. Also, the Bureau of Mines shows in its last issue on fatalities that accidents from fall of roof and coal killed more men than any other two causes combined, and that they account for more than half of the deaths under- ground. It seems we are getting too accustomed, taking too many things for granted, running too many risks, trusting too much for the best, and preparing too little for the worst. We must remove the cause; then the effects will cease. However, I can see that a better day is here. The main damaging factors underground are falls of roof and sides. A bad roof is tender and lacks the adhesive qualities to sustain its own weight over comparatively small areas. A roof of any character which is frequently penetrated by well-defined slips and cleats, is characterized as a treacherous roof. The carelessness of men has been one of the main causes of most of the accidents in mining as well as in any other industries. Three Grades of Miners Miners can be classified into three distinct grades, to-wit: the experienced and careful, the experienced and reckless, and the inexperienced. The accidents which the first class usually meet with occur through the carelessness of their co-workers, as well as through accidents which are termed unforeseen, such as falling roof between timbers, and between the timbers and the face of the coal. This may have 'previously given evidence of being absolutely sound and safe, but be released by invisible slips or by sudden outburst of occluded gases in large quantities, as we term big blowers or feeders,

Jan 1, 1913

The Annual Business Meeting of the members of The Rocky Mountain Coal Mining Institute held during the 83rd Regular Meeting of the Institute was called to order by the president, Bernard Bernstrom at 2:50 p.m. Tuesday, June 30, 1987 in the Janss Auditorium of the Snowmass Conference Center in Snowmass Village, Colorado. Thirty-one were present and a quorum was established. The president outlined the purpose of the meeting was to inform the members of the status of the affairs and activities of the corporation during the preceding year. It was moved by Leon Jeannot, seconded and carried to approve the minutes as published in the 1986 Proceedings. The chair called for reports of the various committees and these reports will by placed on file in the RMCMI Office. Bylaws and Resolutions. Chairman Loren V. Linville reported there were no bylaws revisions. He further reported that the Board had adopted three resolutions: (1) Noting the passing of members since the last convention-Benton Boyd, E. A. Hare, E. S. Moran, Jr. and Edward Prostel. (2) Of appreciation to the Executive Secretary, officers, chairman, Diamond Jubilee chairman and committees and convention committees for an outstanding job in preparing for the 83rd Regular Meeting of the Institute. (3) To recommend to all RMCMI members that, on an individual basis, they each oppose replacing coal fired generation with natural gas generation. Membership. Chairman Leon Jeannot reported that at the beginning of the 1986 fiscal year, there were 881 active or dues-paying members. During the year, 219 members were dropped for a variety of reasons such as non-payment of dues, transfer, employed elsewhere, change of address. Ninety-six new members have been recruited for an active total of 758. In addition there are 55 Life Members, 20 senior members, six scholarship winners and seven supporters for a net total of 846. The budget of RMCMI calls for 1,000 active members and we must address and plan for those short-term prospects as they will certainly impact our membership. A full report is on file in the RMCMI office. Patrons of the Institute. Chairman Ira McKeever reported that only 59 Patrons renewed their support during 1986-87. Program. Chairman Bill Balaz announced that the convention program theme "This is OUR Life", as presented in "Past", "Present" and "Future" segments was very well received. He called for additional helpers another year and suggested that next year's program format be changed to a hard hitting one. Publicity. Chairman Tom Egan reported that of the three newsletters sent members during the year, that the most effective one was the newspaper format one and recommended its use next year. RMCMI hired Bob Jacob who heads his own public relations firm to solicit advertising for the Proceedings on a contract/ commission basis. He attended the convention for this purpose and to solicit business card ads. A full report is on file in the RMCMI office. Scholarship. Chairman Keith McGinnis reported that five of the six scholarship recipients were present at the convention. Each was introduced to the membership at the Tuesday morning Scholarship Breakfast, presented a plaque and responded. The input from each winner was most favorable to the program. Each was appreciative of the many contacts made and the educational seminars and programs. The selection process started in March and was completed in May, except for one university which had difficulty in providing a candidate. It is suggested that the initial contact with the institutions be made in December and completed by April 1. This year, for the first time, three of the six universities were visited for the purpose of interviewing the candidates. They were Colorado, Utah and Wyoming. A very positive feedback was received from these schools and it is recommended that the practice continue. CONVENTION COMMITTEES Convention Arrangements. Doris Finnie presented the following report: As a professional meeting planner, this Diamond Jubilee convention was indeed a great challenge. One meal was added to the package and thus increased the individual cost. Snowmass Resort Association is unique in that they utilize a conference coordinator who acts as the middle man between myself and the usual persons we deal with, like AV personnel, the chef, the banquet director, the steak fry personnel, the Sunday tour etc. so the office had to become creative. For instance, we learned early on we could not deal with the local florists. It cost us lots less to buy our flowers wholesale in Denver, have my husband drive them up and our West Virginia daughter to arrange them! But, finally her floral arrangement class at CSU paid off! This was truly a Finnie family orchestrated convention. Our Lakewood daughter acted as Scholar-

Jan 1, 1987

By F. A. Young

A description of the dry process coal cleaning plant which has been built and operated by St. Louis, Rocky Mountain & Pacific Company at their mine at Brilliant, New Mexico, should at first be a description of the special machinery which is used in this process. This equipment consists primarily of screens for sizing the coal into six different sizes all smaller than 1 ½ inch and the pneumatic machines for cleaning each size. These machines are patented and were manufactured by Sutton, Steele & Steele of Dallas, Texas, until a few months ago when all rights of sale were acquired by the American Coal Cleaning Corporation. These screens, a plan of which is now before you, are called anti-gravity screens because the coal travels up hill. The screens which we have at Brilliant are 3 feet wide and 7 feet 4 inches long. They consist of one upper deck which slopes upward in the direction of the flow of the coal, at an angle of 12 degrees. This deck is a wire mesh screen the size of which determines the size of oversize from that screen. Under this is a lower deck with a slope of 7 degrees. This is a solid bottom and is for advancing the undersize to the next screen. On account of the difference in pitch of these decks they are about 11 inches apart at the discharge end, which allows the oversize to be taken off at one or both sides and the undersize to fall only a few inches on to the following screen. This is perhaps the most valuable point in this patent as it allows any number of screens to be placed on a-level floor, tandem in a battery without elevating or rehandling the coal in any way. The length of the screens corresponds to the proper spacing of the cleaning tables which naturally operate on the floor below. I know of no other screen which can be operated in this way. The coal is caused to travel by a reciprocating motion. A shaft as shown near the center of the screen box and under it has an eccentric at each side of the screen with connecting rods attached near the rear of the screen box. The screen box is attached to the stationary under frame by means of cast iron plates extending full width across the screen box. These are placed at an angle as shown so that the forward motion of the eccentrics causes the screen box to rise as it moves forward and the backward motion drops the screen from under the coal thereby causing it to advance. The coal advancing over the screen cloth in this rolling or jumping motion causes very perfect sizing. It should be stated here that very accurate sizing is necessary for the success of the cleaning tables. The stroke is 1 inch and the speed 350 revolutions per minute. In describing the pneumatic cleaning table, I place before you a plan furnished by the makers. The basic principle is that if a film of coal one to two inches thick and all of nearly the same size pieces is placed on a flat perforated surface and a large volume of air passed through it, the lighter particles which are the clean coal will soon find their way to the top of the film, while the heavier particles, or waste, will remain on the bottom. The machine is built with a perforated deck about 4 feet square under which is an air chamber and air duct connecting with a fan which is part of the machine. The deck of the table has a reciprocating motion the same as the screens already described, which tends to advance the product up a slight slope which is adjustable. The coal is fed at one corner of the table as shown and the deck slopes also away from the feed and at right angles to the reciprocating motion. On top of the perforated deck are riffles about 2 inches apart and running parallel to the line of reciprocating motion. These riffles are about 1/2 inch high at the fan and feed side of the table and taper to nothing at the far side. When the coal is fed on to the table, the air through the perforations tends to raise it 'and roll it over these riffles down the slope toward the clean coal discharge. The heavier particles do not get over the riffles so rapidly and the reciprocating motion is constantly pushing them

Jan 1, 1923

President Robert Wilson opened the meeting at 9:00 a.m. He introduced William A. Bear, General Manager Bear Coal Company, Inc., Somerset, Colorado, who presided over the session. George Nugent, Peter Kiewit Sons' Company, Sheridan, Wyoming, presented a most interesting film "Montana Mine Reclamation." His biography follows: George Nugent first entered the coal business in 1943 when he developed Peter Kiewit Sons' Co.'s first coal mine-Big Horn Coal Company at Sheridan, Wyoming. Since that time he managed an expansion program for P.K.S. in mining that resulted in the development of two other producing mines - Rosebud Coal Sales Company at Hanna, Wyoming and Decker Coal Company at Decker, Montana, in which Pacific Power and Light is a partner. Applications are now pending for a third mine. Black Butte, a joint venture of P.K.S. and Rocky Mountain Energy Company, near Point of Rocks, Wyoming. Nugent is a Past President of the Wyoming Chapter, Association of General Con- tractors, Wyoming Mining Association and Rocky Mountain Coal Mining Institute. He was President of Big Horn Coal Company and Rosebud Coal Sales Company as well as Manager of the Mining Division of Peter Kiewit Sons' Co. and Decker Coal Company when he retired Jan. 1, 1975.

Jan 1, 1976

The 78th Regular Meeting of the Rocky Mountain Coal Mining Institute (hereafter referred to as RMCMI) convened at the Marriott's Mark Conference Center, Lionshead Village in Vail, Colorado. The meeting was called to order at 8:45 a.m. by the President, Ira E. McKeever, Jr., who is President, Western Mining Operations, Natural Resources Group, W. R. Grace & Co. McKeever was introduced by Past President Edward F. Ziolkowski, Senior Vice President and General Manager, Energy Development Company in Hanna, Wyoming. MR. ZIOLKOWSKI: The first order of business this morning is to introduce the president and for a business meeting as well as other items on the program. It is my pleasure to introduce Ira McKeever to you this morning. Ira was born and raised in Kit Carson, Colorado, and served in the U.S. Navy prior to obtaining his geological engineering degree in 1952 from Colorado School of Mines in Golden. He then spent the next 20 years involved in mining sulphur, pot ash and coal with Texas Gulf Sulphur at that time and Gulf Resources Chemical Corporation. In 1972 he joined W. R. Grace & Co. as president of the Mining Division, Natural Resources Group. He was named Colowyo Coal Company's president and general manager in 1976 to develop what is currently Colorado's largest coal surface mining operation. Last year he became W. R. Grace's president of Western Mining Operations which is the position he presently holds. Ira is active in civic affairs; he is currently serving on the Colorado Energy Impact Assistance Advisory Committee. He is a member of the Colorado's Metropolitan Water Roundtable, he is also a director of Project Colorado, a member of the committee for the Colorado Division of Commerce and Industry. He has, in the past, served as chair- man of the Craig Hospital Board. In 1967 Ira was the recipient of the Colorado School of Mines van Diest Gold Medal Award, and in 1981 was given the individual service award for outstanding accomplishments in the field of health, promotion, physical fitness by Colorado's Governor's Council for the Health and Promotion of Physical Fitness. Memberships are also held in Denver Coal Club, the Colorado Mining Association, and the American Mining Congress. Will you please welcome Ira McKeever? I do have one other piece of business here. If you will all join with me, yesterday was Ira's birthday. I asked what year that was, but I couldn't get that out. So, I'm not going to lead the singing. Someone is going to lead the singing. But I think it would be appropriate if we did sing happy birthday this morning and I think it would also wake us up. How's that? All right, will you join me please? (A chorus of the Happy Birthday song followed.) President McKeever's address: MR. McKEEVER: The secret is that I'm double nickles. So I've got a few more years hopefully to be with you and this wonderful industry that we represent. Thank you Ed. I realize now more than ever, the tremendous effort that you put in the program last year and the magnitude of the job that is placed in the presidency of the Institute. It was indeed with tremulous hands that I undertook to lead the Institute this year, and I found a tremendous amount of strength and guidance in my friend Ed whom we've known since college days and worked together. On behalf of that lifetime of memories and good thoughts, Ed, I would like to present to you a little token of appreciation. 1 would like to join Ed in welcoming you all to Vail. Ed arranged the weather, 1 arranged the program along with Charlie Margolf. This is the 70th regular meeting of the Rocky Mountain Coal Mining Institute; and in accepting the leadership a year ago, 1 obligated one very special person to fill the role of chairlady and hostess for this meeting. I would like to have you all, if you haven't already, meet my wife, Linda. I would like to thank her publicly for her guidance and help she continues to provide me. It's absolutely necessary that you also meet and recognize Charlie Margolf our program chairman who will be helping through the meeting to present and monitor our program; and anyone who knows Charlie knows the sincerity and dedication he brings to anything or any phase of life he touches. We will be seeing him in action this afternoon when he chairs the most interesting panel presentations. Don't miss it if you can help it. A couple of logistical comments. We will have to keep our meeting on schedule so that any of our non-agenda items that we need to keep, maybe we

Jan 1, 1982

By Richard L. Lawson

Thank you President Nielsen, and thank you ladies and gentlemen of the Rocky Mountain Coal Mining Institute. I'm glad you asked me to join you a second time. The setting here at Tamarron is splendid. A few days ago the National Coal Association held its Diamond Anniversary meeting at the Broadmoor in Colorado Springs. Although NCA is junior to this Institute in years, we do try to keep up. Our speakers looked at 1992 as the possible eve of a new era in world history - a pivotal year. It offers the opportunity to replace a dying era of war and tension with a new one of peace and prosperity built on economic cooperation and trade and, of course, energy to uphold all four - trade, cooperation, prosperity and peace. The Persian Gulf War was only a sample of what can happen to the other four if the energy isn't there. And so I especially like your theme: Energizing America With Coal. It is most pertinent. I was invited to discuss the National Energy Policy and its impact on coal and I intend to do that. But more important is coal's impact on the Nation and the world and so 1 shall discuss that as well. This year - 1992 -also will be pivotal in the Nation's politics.

Jan 1, 1992

Houston T. Aars Carter Mining Co. Sundance Rt. Moorcroft, WY 82716 Charles R. Ahlbrecht Western States Surveying Inc. 7030 So. Yosernite Englewood, CO 801 12 Dean Albon Monsanto Co. 800 No. Lindberg St. Louis, MO 631 67 Robert Anderson Mobil Oil Producing Inc. POB 17772 Denver, CO 8021 7 Stephen P. Antony Orbital Engineering 6789 So. Yosernite Englewood, CO 801 12 David Ariotti Boyle Mining Engineering Service Rt. 1 Box 15M Helper. UT 84526 Douglas Auck Falkirk Mining Co. 103 McKinley Ave. Underwood, ND 58378 Roger Backrnan N. D. Crockett & Assoc. 3467 Sorenson Way Salt Lake City, UT 84109 Richard Bailey Continental Conveyor & Equip. Co. 602 Park Point Drive Golden, CO 80401 Earl W. Baker Baker & Co. 4965 Jackson St. Denver, CO 80216 Allen P. Barber San Juan Coal Co. 705 Ocio Farrnington, NM 87421 Edward Barker Process Equipment Builders POB 7506 Paducah, KY 42001 Larry Barton Carter Mining Co. 101 5 Teewinot Circle Gillette, WY 82716 Hugh Bastian American Carbide Corp. POB 2650 Ronald N. Batdorf Monsanto Co. Box 701 Saratoga, WY 82331 Georgetown, KY 40321 Doris A. Bauer Mobile Oil Corp. POB 17772 Denver, CO 80217 Jan Beam Blount International Ltd. 2570 So. Dayton Way #E-308 Denver, CO 80231 Mac Beaudry Falkirk Mining Co. 1029 Cannon Ln. Washburn, ND 58527 R. C. Beerbower Gates Engineering Co. Drawer A Beckley, WV 25801

Jan 1, 1982

By Thomas Lien

Session 1 - 1 :45 p.m. June 27,1983 Session Chairman: Robert Diederich, RMCMl New Mexico Vice President MR. DIEDERICH: My name is Bob Diederich. I'm the Vice President of the Rocky Mountain Coal Mining Insitute from the state of New Mexico. I'm manager for the Navajo Mine down in Farmington, New Mexico and also project manager for a new mine that we're starling out called the LaPlata Mine in the same area. I'd like to introduce our first speaker, Tom Lien, who is the Director of Engineering, Western Division of AMAX Coal Company. He is responsible for mine engineering, environmental engineering, permitting, reclamation, planning, design and construction plant engineering, geology exploration, quality control and real estate for the western division. He joined AMAX Coal in 1980 as manager of preparation and quality control and was promoted to the present position in August of 1980. He has a BS in geological engineering from the University of Mines. He previously worked for Kennecott Copper Corporation in Hayden, Arizona from 1965 to 1970. He worked as a mine geologist, mill metallurgist, mine production and quality control engineer. Then he also worked for Kaiser Steel Corporation, Eagle Mountain Iron Ore Mine in California, 1970 to 1977. Worked as a process engineer and plant superintendent at that place. Then he was employed by Mountain States Research and Development, Tucson, Arizona, 1977 to 1980. Worked as a senior process engineer and operation superintendent. So without further ado, I'd like to introduce Tom Lien who will talk to us about in-pit coal crushing. MR. LIEN: Thank you. The official title of my paper is actually: "The Potential for In-pit Crushing and Conveying in the Powder River Basin." The Powder River Basin is one of the world's greatest coal fields and will be an important source of energy for centuries to come. About one-eighth of the total coal producing in the United States comes from the Powder River Basin, and 80% of that production came out of Campbell County, Wyoming last year. The growth potential for this region is projected to be enormous. New technology as well as existing technology will make this region competitive in the decades ahead. Understanding the current status of the Powder River Basin, both the mines and the possible methods for changing the means of material movements within the mines is the subject of this paper. Each mine is unique and must be addressed specifically with respect to the application of new and innovative technology. There have been many articles written in the recent mining journals on in-pit crushing and conveying applications, including costs which are very interesting, enlightening and I recommend it to any company considering such installations. To give a general setting, coal production in the United States for 1982 was about 800,000.000 tons. This production came principally from six regions, the Applachian fields of the eastern states where bituminous and anthracite coals have been mined for almost three centuries, the Midwest located in the upper Mississippi Valley are often typified by huge dragline operations of which AMAX Coal has three right now, the Gulf Coast lignites. feeding mine-mouth power plants, the vast bituminous and sub-bituminous departments of the four-comer states of Arizona, New Mexico, Colorado, and Utah and finally the Northern Great Plains lignite fields currently being developed and the sub-bituminous fields of Wyoming and Montana including the Powder River Basin. The Powder River Basin is located in northeastern Wyoming and southeastern Montana. It is the darker brown right in the center of the photograph. It covers about 18,000 square miles. It's about 200 miles north to south and 90 miles east to west. The shallowest coal beds are on the east, north and northwest edges of the basin with deeper coal beds toward the center in the same kind of relationship. There are about one trillion tons of coal in the Powder River Basin, that's the one with 12 zeros after it. A little bit there. It's distributed in many, many seams at varying depths to the current topography. In 1982 about 100,000,000 tons of coal were mined from this basin and 81,000,000 tons came out of Campbell County, Wyoming. The mines that are shown in this picture are basically the mines around the basin edge. The principal area that I'll be talking about is the eastern edge down where it shows Gillette and Campbell County. Geologically the Powder River Basin is the Fort Union formation. The most productive seam is called the Wyodak or Smith-Roland or the Anderson-Canyon, depending upon where you're located. There is about 75 billion tons of coal in the Wyodak of which about 23 billion are considered surface minable today. the coal is Paleocene in age, about 40,000,000 years old. It was once an old Delta region very much like the Mississippi River delta is today. During the 100,000 years that this deposit was formed peat accumulated to a thickness of about 365 feet. It was later buried and turned into sub-bituminous coal. All of the coal mined in the basin is for the electric utility industry. This coal has a typical BTU content of about 8,300 plus or minus about 4,500 BTUs. Sulfur coal is generally less than'/ %, thereby making this coal compliance coal in terms of sulfur dioxide emissions, 1.2 pounds of sulfur dioxide per million

Jan 1, 1983

Mr. O. F. Lewis opened the meeting at 9:00 a.m. lie announced that Stan Shuhart, had the following announcement. to make: Stan. Shubart: George Delamater of Fort, Lauderdale, Florida scads greetings to his friends here at the meeting. O. F. Lewis: Thank yon, Stan. This morning we will start our meeting by turning it over to a very distinguished gentleman. I'm sure all of you know him. He started his work career many, many years ago, but lie doesn't look nearly this old, and his energy belies this. From 1.910 to 1916 he was a chemist with the American Smelting & Refining Co. at. Garfield, Utah. From 16 to '17 he was a broker with J. A. Hogle Company at Salt Lake. From 1917 to 1948 he was a metallurgist, ore buyer, assistant manager and later general manager of the Utah department. ASRC at Salt Lake City; and also president of the Garfield Chemical Co. Since 1951 to the present. time he has been President and General Manager of the Independent Coal & Coke Co. and Vice President of the Western Rock Bit Co. He has held many, many honorary positions; former Chairman of the Board of Regents of the University of Utah, former President of the Salt Lake Winter Sports Association, Past President. of the Community Chest there, and is presently a Director of National Coal Association, a Director of the First Security Bank of Salt Lake City, Utah, and also a Director of the Hotel Utah.

Jan 1, 1965

PRESIDENT MOSES: I thank you, Mr. Emrick. Mr. Shubart would like to supplement your paper with another article. SECRETARY SHUBART: My paper really should not supplement Mr. Emrick's paper, because I secured some data from him, I knew Mr. Emrick had had a great deal of experience in shearing and I thought he could give you some useful data. (Here Mr. Shubart read the following:) "For the past two years, there has been considerable discussion among coal mining men concerning the advantages of a shearing cut in addition to the undercut, in mine work. We have had a number of requests for information on sheared coal. We were asked questions like these: What percentage increase in lump can be obtained from sheared coal? What has been the experience of mine men who have employed the shearing cut? Is the shearing cut a means of increasing the lump content? If so, is it increased to such an extent as to warrant the installation of shearing machines? Upon investigation it was found that no one could give us any definite information on the subject as no one had weighed separately the grades of coal produced from' the shearing cut. With a view of getting this information first-hand, the Goodman Manufacturing Company built up a shearing machine to be used in experimental work only. The officials of the Troy Coal Company were eager to share in the expense of obtaining this information, so that in May of this year we shipped to their mines our first type 319 shearing machine. The Troy Coal Company operates a mine at Troy, Illinois, in the No. 6 seam and produces about 275 tons daily. The coal seam averages five and one-half feet in thickness. Previous to the arrival of the shearing machine the coal was undercut six feet deep by a' Goodman Shortwall Machine. To break down the coal required two shots in the entries and three in the rooms. The percentage of lump measured over two-inch screens, averaged 58.2 per cent. The conditions of the mine were very favorable for obtaining accurate weights on the amount of lump and slack coal run over the shaker screens. The shearing machine easily cut the entire tonnage of the mine so that all coal dumped into the railroad cars had been produced from a shearing cut, in addition to an undercut. Accurate records were kept of the railroad weights and front this data the percentages of lump and slack were computed. During the month of June the percentage of lump produced over two-inch shaker screens was 69.9 per cent. This result demonstrated that the introduction of the shearing cut had increased the percentage of lump twenty per cent. The entries were driven ten feet wide and the rooms thirty feet wide The shearing cut was made near the center of the face in all places. A hole was drilled in each rib and the coal shot down with one-half the powder required when the places had been undercut only. The coal was broken down to the back of the cut so that very little pick work was necessary to load it out. The benefits derived from the shearing cut were as follows: 1. Increased percentage of lump, thus increasing the average price of coal per ton. 2. Preservation of a tender top due to the decreased amount of explosive used. 3. Facilitated handling of coal by the miner thus increasing the tonnage per man. 4. Eliminated coal yardage in entries and crosscuts of ten feet or less in width for the reason that the shearing cut provides a loose end from which to shoot the coal. This applies to the union fields only, as the non-union mines do not pay for coal yardage. Based on a price of $2.50 for lump coal and $1.25 for slack coal, the average price per ton was increased

Jan 1, 1926

By C. P. Crawford

Bureau of Mines Technical Paper 172, by S. H. Katz and H. C. Porter, entitled "Effects of Moisture on the Spontaneous Heating of Stored Coal", says at the outset, "Spontaneous fires in storage piles of bituminous coal' have been the source of trouble and loss since the industrial utilization of coal began. In Europe the idea arose that spontaneous combustion is more liable to happen during wet weather than during dry. Statements favoring or opposing this idea have crept into the literature. Conflicting conclusions, based on experiment as well as opinions based on observations of various degrees of reliability, are given in most of the recorded discussions of the subject. "Because of the uncertainty of the effect of moisture and its seeming importance among the conditions that affect spontaneous combustion in stored coal, the work described in this paper was undertaken by the Bureau of Mines. The experiments showed that a coal from Illinois oxidized faster when dry, whereas a sample of Pittsburgh coal oxidized faster when moist. These discordant results and similarly inconsistent results from the observations of different investigators may be coupled with the fact that under actual conditions of, storing, both coal and air always contain a considerable amount of moisture." The foregoing report of the investigations of the Bureau demonstrates that the mystery of spontaneous combustion has not yet been solved. This fact adds to the fascination of the subject. I became interested in the matter about ten years ago in observing what was probably one of the best exhibitions of this phenomenon. The old dump at Castle Gate No. 1 Mine contained boney coal and track cleanings generally. In winter when snow fell upon this old dump, the snow was soon melted by the heat of the dump which was comparatively warm at all times. Within 48 hours afterward little blue flames were in evidence on the surface of the pile. Few of the gas feeders were sufficiently constant to maintain a steady flame at any given point, but shifting emissions of gas were ignited one by another, resulting in a continuous popping and apparent running about of the flames. Another interesting exhibition of spontaneous heating was to be seen a few years ago in the storage coal piles of the local sugar factories. This coal was piled in concrete lined pits and the latter were filled with water. However, or this occasion the coal extended above the surface of the water. At every plant where this condition existed the coal was affected heating, and in each case the affected area was in a plane horizontal to and from 8 to 1.4 inches above the water level. The height of the hot area above the surface of the water appeared to be affected by the fineness of the coal. It is well known that oily rags have a tendency to heat when allowed to accumulate in some location protected from free air circulation. For some reason, as yet unknown, this does not apply to petroleum or its derivatives. Now, the most common explanation of spontaneous combustion is that the combustible material oxidizes by being brought into contact with air in the presence of moisture, the theory being that the moisture acts as a catalytic agent. My theory is that spontaneous combustion is due to oxidation of combustible matter by free oxygen carried in solution by a liquid, the oxidation taking place only as, when, and at the place where this oxygen is released from solution by the evaporation of the liquid. Also, this oxidation takes place to some degree regardless of the condition of the combustible-whether it be lump coal, coal dust, straw, wheat flour, coke, or any other combustible but, as the speed of oxidation is directly influenced by temperature, it follows that spontaneous combustion only becomes noticeable or serious in cases where the resulting heat' cannot escape as fast as it is generated.

Jan 1, 1925

By T. H. Butler

February 22nd, 1926. Mr. Benedict Shubart, 521 Boston Building, Denver, Colorado. Dear Mr. Shubart: At your request, am submitting to you several suggestions for the amendment of our safety code which you felt should be kept up to date. As before, am advising you that these suggestions do not have the approval of the entire Safety Committee, but rather are the individual opinions of several members who have expressed their wishes in the form of letters to me. I am particularly indebted to Mr. Dan Harrington and Mr. Wm. Littlejohn for their assistance. Would recommend the following amendment a to the various sections. Section 1. Wherever possible trolley wires should be securely hung to roof or timbers at a distance of not less than five feet and not more than six and one-half feet above rail and six inches to one side. Spacing of hangers should be from 20 to 25 feet apart. Section 2. 500 volts D. C. should not be allowed in any installations. Trolley wires should not carry a voltage of more than 250 D. C. Pumps, mining machines and other small machinery units where A. C. power is used should not carry a voltage of more than 220. Large units, such as pumps, motor genera- tor set and hoists, may use a voltage of 2,200. When power cables to operate same are of armored construction, cables should be securely buried at all crossings. Section 4. Where power lines pass through door frames or stoppings they should be properly insulated with porcelain or rubber tubing. Whenever men get on or off man-trips in vicinity of trolley wires same

Jan 1, 1926

By O. C. Irwin

For several years the C. F. & I. Co. men have been working on a fan signal and many different schemes have been tried. I will describe a few of them. A make-and-break attachment was placed on the fan shaft which caused a light to flicker. A hinged door was placed on air course and counter balanced so that it would have a slight travel when the air pressure was reduced an appreciable amount. This motion was used to open the power circuit, blow a whistle, or ring a bell. Series transformers were placed in motor leads of fan drive motor and the variation in amount of power to motor was used to control the fan signal through a magnet or relay. A governor was placed on the fan shaft which opened a signal circuit when speed of fan was reduced. We tried to produce a machine actuated by the volume of air, (that is on the principle of the anemometer) but had to discard this due to its being too delicate. None of the above schemes seemed to fill the conditions which the State and our Mine Inspector wanted covered. They gave us the following demands for a signal: 1. Must open mine circuit and sound alarm when air pressure was reduced below a certain amount. 2. Must be fool proof. 3. Must work on any kind of fan drive (steam or motor). 4. Must be safe to ' install- in any mine or fan house. 5. Must not depend upon mechanical device which could become inactive due to friction or other causes. 6. Must be as simple and easy to adjust as possible.

Jan 1, 1925

By Wm. Monay

MR. MONAY (Vice President Kinney Coal Co., Scofield, Utah): The past year and a half has witnessed a series of coal mine disasters in Utah and Wyoming, concentrated into the short space of a few months, following a long period of years in which the industry was comparatively free from devastating calamities. The natural result has been a hysterical activity on the part of bureaus, commissions and professional reformers who know little about coal mining from a practical standpoint. This activity has been met by the industry in Utah with an attitude of submission, no doubt the result of the fear of being misunderstood by the public. But it is my firm conviction that the lives and property of the coal industry will find their surest guaranty of protection in the humanity, and in the self interest of those operating and working in the mines, rather than in governmental regulation. Inelastic, inflexible blanket statutes and rules will simply stifle and hamper the initiative and progress of our industry in working out its own salvation, under the varying and changing conditions of different localities, different conditions, and in different mines. We who have spent our lives in digging in the mines and operating them, know more about this business than anyone else and I believe it is time for us to speak up and no longer sit meekly by while inexperienced bureaus and unskilled commissions make up laws, rules and regulations for us which when made are on the books to stay, even though in a short time they may prove inapplicable, in whole or in part, or be superseded by something different, and which in some cases create new dangers or lull us into a false sense of security. Shortly after the Castle Gate explosion in March, 1924, a new set of safety rules was issued by the Indus- trial Commission of the State of Utah to become effective July 1st of the same year, the most important of which prohibits the use of black powder in any mine--gaseous or non-gaseous; prohibits the use of open flame lamps in any mine-gaseous or non-gaseous; and requires that rock dusting in all main haulage ways as far as the freezing point and required that all mining machines be equipped with water to be applied while cutting. These rules have been characterized as "Utah's Monument to her Dead Miners" in a large poster spread broadcast over the country from an office in New York that styles itself the Association for Labor Legislation. In reviewing the coal mining history of the State of Utah, in the year 1900, a serious disaster occurred at Winter Quarters. The cause of the same is believed to be an explosion of powder that was stored in the mine, which was a common practice in the early days, and from that time until the Castle Gate disaster, March 8, 1924, a period of some twenty-four years, no explosion of any kind occurred in this district. During all this period open lamps were used, considerable black powder was used, rock dusting was unheard of, sprinkling with water was very generally done-all without any catastrophe. Since the adoption of the new rules, we have 'had a very violent explosion at the Carbon Fuel mine in Spring Canyon. At the time of this explosion, 3,000 feet of the main slope had been rock dusted several times between July 1st and September 21st. The second left entry, which is a main haulage way, a distance of 3,000 feet was completely rock dusted on the date of the explosion. This mine is not considered extremely gaseous, yet an explosion as violent as that of the Castle Gate mine occurred. Some thirty men who had been loading coal in various parts of the mine on this Sun- day, the day of the explosion, and other men employed in rock dusting the second left entry, had just left the mine a little while before it occurred, and no abnormal condition in the mine was noted. At the time of the explosion five machine men were in the mine.

Jan 1, 1925

By A. C. Watts

The question of disposition of the slack and dust so troublesome to coal mine operators of the West has been divided by your committee chairman into three heads, viz: The preparation and transportation of fine and powdered coal. The developments along the line of low heat carbonization. The uses to which fine and pulverized coal have been put. The development of low heat carbonization has been assigned to me. This is really not a part of the subject but as it has a most important bearing on the future use of coal, I presume the chairman thought best to include it. An English committee on smoke abatement makes the statement that the burning of raw coal is "dirty, wasteful and unscientific". I will go a step further and characterize it as an "economic crime." It has been predicted by eminent scientific men that eventually no raw coal will be burned for heat or power purposes. All this will take time, experimentation and large expenditure, but it will surely come. The question of disposition of slack and dust so troublesome to coal and utilization of its by-products has been retarded by the abundance and cheapness of the raw coal, and by the abundance of suitable coking coals for metallurgical purposes. But necessity is surely, if slowly, demanding that the enormous waste ensuing from the burning of raw coal for heat and power must cease. For instance, smoke abatement investigations in Manchester, England, showed that the increased cost of household washing was about $1,250,000 per year due to smoke and soot. It is estimated that in London 200 tons of soot and smoke particles are suspended in the atmosphere over that city during dense fogs and that much more than this is emitted from the chimneys each winter day during the forenoon. As an example of what benefits a smokeless fuel gives, it is cited that in the mill town of Shaw, England, the burning of smokeless fuels in the factories has reduced the so-called fogs by about 80%. Necessity, caused by the war led Germany into the field of low tem¬perature carbonization because of the shortage of motor fuel and lubricating

Jan 1, 1922

The nineteenth regular meeting of the Rocky Mountain Coal Mining Institute at Rock Springs, Wyoming, was called to order in conjunction with the Wyoming State Safety and First Aid Meet, at 2 p. m., Thursday, August 7, 1924, by President William Littlejohn of Castlegate, Utah. Meeting opened by invocation by Father Welsh. Address of Welcome by Mayor P. C. Bunning and key to city presented to President Littlejohn. Response to address, of welcome made by President Littlejohn. Minutes of the last regular meeting read and approved. Report of officers: Financial statement by Secretary-Treasurer Shubart, who stated that there was $1,225.68 in the treasury and requested that the report be referred to an auditing committee for examination and approval. Motion by Mr. Pryde that the report be referred to an auditing committee. Seconded by Mr. Robinson. Carried. A committee of three, consisting of Messrs. Murphy, McKeehan and Gibson, were appointed by President Littlejohn to examine the report, and approve it. As no time was found during the meeting, the Committee was instructed to report later by mail. Report of Standing Committees: Mr. Pryde stated that the report of the Safety Committee would he presented at the morning session, August 8th. Report of Special Committees: None. Unfinished business: President Littlejohn stated that some action should he taken on the interchanging of certificates in the four states of New Mexico, Colorado, Utah and Wyoming. A committee should probably be appointed from each of the states, and the matter left in their hands to try if possible to get their legislators to put some law into effect which will make the certificates in all these four states interchangeable. President Littlejohn also stated that the subject had been brought up, through correspondence, of changing the emblem of the Rocky Mountain Coal Mining Institute, which is the old oil lamp, and that he had had a letter from Mr. C. M. Schloss, who stated that inasmuch as the old oil pit lamp was symbolic of mining it should be retained so that unless someone had any

Jan 1, 1924

By James J. Bryja

The production capabilities of today?s longwall systems have resulted in significant increases in retreat rates. This has in turn resulted in a heightened demand on panel development rates to assure that subsequent panels are completed in time to avoid a longwall production outage. As a means of reducing the pressure on the panel development activity a trend has developed towards the use of wider face lengths. The aim of using a wider face is to reduce the longwall retreat rate without sacrificing productivity and thereby reduce the pressure on increasing panel development rates. However, as the face width increases so too does the number of hydraulically powered roof supports that are required to control the longwall face roof. This increase in the number of units inherently translates into increases in the level of required maintenance relative to the multitude of mechanical and hydraulic components, and an increase in the time required for tear-down and installation time during the moves between panels. An obvious method of mitigating the maintenance and move-time impacts of wider faces is to employ the use of individual roof supports having a wider center-to-center spacing. This practice would serve to minimize the number of roof supports and maximize the time availability for longwall face production. With this target in mind a joint research project with DBT was initiated in 1998 to study the feasibility of using 2 m wide shields to replace the then standard 1.75 m wide shields. After four years of comprehensive work, the technical team from DBT and RAG American Coal completed the design and development of a prototype shield that would later become part of the world?s widest longwall face employing the use of shields having a spacing of +2 meters. The final spacing of the shields actually became 2.058m in order to match the standard pitch of the rack bar shearer haulage elements on the conveyor. In July 2002, the 2 m wide shields were successfully installed in LW-46 panel at RAG Cumberland mine in the U. S. The authors in this paper summarize the design considerations of and operational experiences with the world?s widest longwall face using +2 meter wide roof supports.

Jan 1, 2008