Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
OFR-168-84 Geostatistics For Resource, Reserve Estimation
By Luis v. Coppa
Since its inception in 1910, the Bureau of Mines has been the principal Federal agency involved in ore reserve estimations, using such traditional methods as polygons of influence and variations of in
Jan 1, 1984
-
Using An Anemometer To Measure Gas Flow From Pipe Outlets - Objective
Provide the mining industry with a simple, accurate and readily available means of measuring the gas flow from pipe outlets such as gob holes Approach The Bureau of Mines conducted laboratory s
Jan 1, 1987
-
Geojet®-Turbojet® - A Deep Mixing Method For The Solution Of Geotechnical Problems
By Maurizio Siepi
The realisation of most of the civil engineering works is subordinate to the execution of consolidation works, in order to improve the soil physical-mechanics characteristics. The works classifiable w
Jan 1, 2002
-
K-Ar and Rb-Sr dating and the genesis of tungsten at the Clea tungsten skarn property, Selwyn Mountains, Yukon Territory
By K. M. Tompson, R. L. Armstrong, C. I. Godwin
"Tungsten skarn deposits on the Clea property in the Selwyn Mountains, Y. T., are related genetically to a quartz monzonite stock, about 500 metres in diameter at the surface. Lower Paleozoic sediment
Jan 1, 1980
-
Proposed workflows for portable X-ray fluorescence and near infrared instruments for soil and drill hole sampling
By N H. Jansen, H L. Bridgwater
Field portable X-ray fluorescence (XRF) and near infrared (NIR) instruments are proven technologies in the minerals industry. The in-field results of these instruments can add value early in the proje
May 9, 2017
-
Moon Creek Reclamation Project Creative Solutions For An Historic Mine Site
By B. A. Ridolfi, S. M. Alvarez
The Moon Creek Reclamation Project provides a case study in the development of creative cleanup solutions for an abandoned lead and zinc mine and mill site located in northern Idaho. Innovative design
Jan 1, 1999
-
RI 7749 Sulfatization-Reduction Of Manganiferous Iron Ore
By F. E. Joyce
This paper describes the development of a process for producing manganese and iron pellet concentrates from low-grade manganiferous iron ores of the Cuyuna range by a two-stage sulfatization-reduction
Jan 1, 1973
-
Applications of fracture mechanics in failure analysis case studies
By M. N. Bassim, W. W. Tennese
"Concepts of linear elastic fracture mechanics were applied to study two cases of failure, namely an equalizing beam from a tandem rear axle of a highway tractor unit and the main beam of a flat bed t
Jan 1, 1985
-
Investigation Of The Effects Of Various Water Mediums On Desulfurization And Deashing Of A Coal Sample By Flotation
By F. D. Ayhan
The aim of this study was to investigate the effects of various water mediums on desulfurization and deashing of a coal sample using flotation. For this purpose, experimental studies were conducted on
Jan 1, 2009
-
Characterisation studies of Tectonised Clay shales and implications in the excavation of large size tunnels
By Marco Barla, Mariacristina Bonini, Giovanni Barla
ABSTRACT: The paper describes the characterisation studies of Tectonised Clay Shales at laboratory and in situ scale. The interest relates to tunnelling under squeezing and swelling conditions, in Ita
Jan 1, 2003
-
The Effect of Sodium Chloride on Bacterial Leaching of Low-Grade Copper Ore
By Madgwick J. C
Leaching column techniques and microbiological methods have been described in detail in Madgwick and Ralph (1980) and Madgwick, Ralph and Sadler (1981).Sixty-nine kilograms of copper porphyry ore (0.4
Jan 1, 1982
-
A New Method for Coal Pillar Design
By KEITH BARRONI
In the proposed criterion for coal a distinction is made between brittle and "psuedo-ductile" failure. This criterion is the basis for the development of new equations for coal pillar streng
Jan 1, 1988
-
Weak Floor Stability During Perimeter Mining In The Illinois Basin Coal Mines (40fab914-2257-4efe-b587-9358b9303f41)
By Murali M. Gadde
Perimeter mining is a special form of very productive partial extraction method practiced at some mines in the United States. In the Illinois Basin mines where all major coal seams have weak underclay
Jan 1, 2009
-
Industrial Minerals the South Island Potential
Industrial minerals by definition are minerals used as part of an industrial process and usually are one of a number of components, eg finely ground Limestone is an extender in the manufacture of pain
Jan 1, 1985
-
ENHANCED PRODUCT QUALITY & ENERGY EFFICIENCY BY MEANS OF INTEGRATED PLANT MONITORING SYSTEM
By Detlef Ehlert
In view of the increasing level of cost pressure on the part of plant owners, optimized plant operation with top product quality and maintenance costs is indispensable. Unscheduled shutdowns with incr
Aug 16, 2017
-
RI 8716 Recovery of Scheelite and Byproduct Sphalerite From Western U. S. Sphalerite From Western U. S.
By J. M. Gomes
Bench-scale flotation tests were conducted on two western tactite ores to study the recovery of tungsten and zinc minerals. The investigation, which is part of the Bureau of Mines ongoing program to d
Jan 1, 1982
-
Airbag Support for Ground Control in Thin Seam Coal Mining
By Fan Shaogang
In this paper, the airbags' structure and technical characteristics and its applications in China are described. Based on the practice of the airbags in mining thin seams, the effects on ground c
Jan 1, 1997
-
RI 3445 Effect Of Acid Treatment Upon The Ultimate Recovery Of Oil From Some Limestone Fields Of Kansas ? Introduction
By R. E. Heithecker
In Kansas, almost every oil well drilled into a limestone formation is treated with hydrochloric (muriatic) acid upon completion. This is done to increase the potential capacity of the well and thereb
Jan 1, 1939
-
Remote Mine Wide Communications
Mine wide, underground wireless communications are possible with the use of Ultra Low Frequency (ULF) technology. Due to the propagation through rock of ULF radio signals a relatively small antenna ca
Jan 1, 2007
-
Vibration Spectral Mapping
By Gordon M. Matheson, Douglas A. Anderson, David K. Miller
"Traditionally, analysis of vibrations from blasting has been focused on peak particle velocity fordetermining the likelihood of both annoyance and damage. The US Bureau of Mines, in RI 8507,indicated
Jan 1, 1997