Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
Design Of Permanent Block Stopping To Resist Strata Convergence
By R. E. Ray, J. W. Stevenson, J. A. Berry
Conventional concrete block plastered with a cementitious coating is the most common material used in the construction of permanent stoppings to direct airflow in underground mines in the US. All mine
Jan 1, 1986
-
Low-carbon Steel
By H. B. Pulsifer
ONE of the most common basic open-hearth furnace products is a simple carbon steel with a carbon range from 0.05 to 0.15 per cent. The material is widely used for sheets, tubes, bars, wire and the inn
Jan 1, 1931
-
The Ultimate Source Of Ores.
By Charles R. Keyes
the leaching of near-by rocks, had had no other result than to bring out from obscurity three certain features of practical lmport, all the labor of that controversy would have been well expended. Th
Jul 1, 1910
-
Concreting Drifts at Ray Mines Division of Kennecott Copper Corporation
By Robert Thomas
DURING the past 20 years the advantages of reinforced concrete as a substitute for timbering in so-called permanent mine openings have been fully recognized, and its use has become almost general prac
Jan 1, 1936
-
Minerals In National And International Affairs (a131cc1d-d516-4b99-8ca1-76fec824fffb)
By Elmer W. Pehrson
Minerals have played a prominent role in the affairs of man and nations since time immemorial but with the advent of the industrial revolution, expanding use of the products of the mineral kingdom bec
Jan 1, 1964
-
The Influence of Carbon, Phosphorus, Manganese and Sulphur on the Tensile Strength of Open-Hearth Steel
By H. H. Campbell
MANY attempts have been made to write a formula by which to calculate the strength of steel from its chemical composition, but most of these endeavors have failed because there were too many disturbin
Jan 1, 1905
-
Geology, Geological Engineering - Fiberglass Plastic Casing Overcomes Corrosion Problem in Water Wells in West Pakistan
By Don K. Smith
The Reclamation Program for the Northern Zone of the Indus Plains in West Pakistan involves the construction of 30,000 irrigation wells to serve 20 million acres with an annual pumpage of nearly 40 mi
Jan 1, 1970
-
Correlation of the Ultimate Structure of Hard-drawn Copper Wire with the Electrical Conductivity
By R. W. Drier
THE conductivity of copper wire is of prime importance to the electrical industry and consequently to the copper refiner and wire manufacturer. Annealed copper wire has a higher conductivity than hard
Jan 1, 1929
-
PART XII – December 1967 – Communications - Diagrammatic Representation of Equilibrium Relations in the Lead-Sulfur-Oxygen System
By Akira Yazawa, Alžbeta Gubcova
RECENT lead-smelting techniques have tended toward use of high-grade concentrates with minimum amounts of flu, accompanied by profitable employment of roast reaction.1-5 In order to better understand
Jan 1, 1968
-
Reservoir Engineering - General - A Mathematical Model of Repeated Steam Soaks of Thick Gravity Drainage Reservoirs
By G. E. Perry, R. D. Seba
The steam soak process is the most widely applied and most successful thermal supplemental recovery process in use today. This process, which consists of injection of steam in various quantities into
Jan 1, 1970
-
Papers - Descriptive - Replacement Hematite Deposits, Steep Rock Lake, Ontario (Mining Tech., Jan. 1943, T.P. 1543, with discussion)
By M. W. Bartley, Hugh M. Roberts
Substantial deposits of Bessemer hematite have been found recently by drilling beneath Steep Rock Lake, Ontario, which is situated in the northern part of the Lake Superior Region. It will be practica
Jan 1, 1949
-
Papers - Descriptive - Replacement Hematite Deposits, Steep Rock Lake, Ontario (Mining Tech., Jan. 1943, T.P. 1543, with discussion)
By M. W. Bartley, Hugh M. Roberts
Substantial deposits of Bessemer hematite have been found recently by drilling beneath Steep Rock Lake, Ontario, which is situated in the northern part of the Lake Superior Region. It will be practica
Jan 1, 1949
-
The Constitution Of The Iron-Silicon Alloys Particularly In Connection With The Properties Of Corrosion-Resisting Alloys Of This Composition (206c4f71-50c8-4892-9acb-82066e568b56)
By M. G. Corson
THE iron-silicon alloy series has always been one of the most puzzling among the binary alloys. Examining the well known mechanical properties of the iron-rich alloys only we meet the following situat
Jan 1, 1928
-
New York Paper - The Constitutiou of Ferro-Cuprous Sulphides
By H. O. Hofman
At the Lake Superior meeting, September, 1904, Messrs. A. Gibb and R. C. Philp presented a paper entitled " The Constitution of Mattes Produced in Copper-Smelting,"' in which they concluded that
Jan 1, 1908
-
Reservoir Engineering – Laboratory Research - Laboratory Study of a Combination of Forward Combustion and Waterflooding – The COFCAW Process
By D. R. Parrish, F. F. Craig
In some respects, forward combustion (alias: fie-flooding, underground combustion, in-situ combustion, dry combustion) is an efficient oil recovery method. For example, its displacement efficiency (as
Jan 1, 1970
-
-
Geology - Quantitizing Geological Parameters for the Prediction of Stable Slopes
By W. C. Lacy
This article is a progress report of a program designed to quantitatively evaluate geological parameters to predict stable slope angles. The author feels that, although there does not appear to be any
Jan 1, 1963
-
Ultimate Recovery From Anthracite Coal Beds
By Henry Otto
THE anthracite industry can be divided into two parts-the underground, or mining, and the outside, or preparation or manufacture. To understand recoveries in the two branches, some of the history of t
Jan 1, 1925
-
Conference on Production and Design Limitation and Possibilities for Powder Metallurgy (Metal Technology, January 1945) - Some Experiments on the Effect of Pressure on Metal-powder Compacts - Discussion
By Jerome F. Kuzmick
Condusions. From the work on aluminum powder, the following general con clusions can bc drawn: I. The physical properties of aluminum compacts, such as density. strength and ductility, inc
Jan 1, 1945
-
Geology of Coal
By Jack A. Simon, M. E. Hopkins
GENERAL GEOLOGY Coal is defined as a combustible rock that had its origin in the accumulation and physical and chemical alteration of vegetation. Coal can be ignited and burned like the wood that was
Jan 1, 1973