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OFR-46-77 Propagation Of Radio Waves In Coal Mines - I. Executive Summary - A. Objective
By Robert L. Lagace
The objective of this task was to perform theoretical analyses related to identifying and increasing the understanding of wireless propagation mechanisms in mines, and for predicting the performance r
Jan 1, 1975
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RI 3133 Sand-And-Gravel Safety Contest Of 1930 (2cf7933a-3927-4707-a0d6-45929fce1d8c)
By W. W. Adams
Lower accident rates were the outstanding feature. of the second annual sand and gravel safety competition conducted in 1930 by the United States Bureau of Mines in cooperation with the National Sand
Jan 1, 1931
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IC 8300 Use Of Mineral Fillers, Granules, And Roofing Rock In California Asphalt-Consuming Industries (57f9cf7b-4a27-49b7-b076-3a12dc4a10fc)
By Wallace W. Key
This report concerns types, quantities, specifications, and uses of non-metallic minerals as a basis for improving their supply, conservation, and utilization. Supply-demand details concerning mine
Jan 1, 1966
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Project and Mining Geology
By Donald A. Ranta
Every mineral project or mine is based on a geologic entity-an ore (mineral) deposit. A well-defined mineral deposit and its associated geologic characteristics are the only aspects of a project that
Jan 1, 2008
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Coal Strength Variation by Lithotype for High-Volatile a Bituminous Coal in the Central Appalachian Basin
By John A. Rusnak
"This paper discusses the variation of coal strength based on the megascopic coal lithotypes for Central Appalachian high-volatile A coal beds. The composition of coal beds is complex and variable, de
Jan 1, 2017
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A Critical Overview of Dithiophosphinate and Dithiophosphate Interactions with Base Metal Sulfides and Precious Metals Mining, Metallurgy and Exploration
By D. R. Nagaraj, Napoleon Tercero, Raymond Farinato
Historically, as for most reagents used in flotation, the wide-spread use of dialkyl dithiophosphinates as collectors in practical applications has preceded a detailed scientific understanding of how
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OFR-155-82 Longwall Mining Principles For Safely Working Steep Coal Seams
By Roger F. J. Adam
This report summarizes the principles of safely working steep coal seam using longwall mining methods. It presents the state-of-the-art and identifies the problems which result from seam inclination.
Jan 1, 1981
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Lead and Zinc Smelting Charges
By Grey CA
Any economic evaluation of a lead-zinc mining project requires the estimation of net revenue per tonne of concentrate at the "mine gate". The value at the mine gate equals the Net Smelter Return min
Jan 1, 1990
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Performance of Footings in Rock Based on Serviceability
By C. M. Haberfield
"1 INTRODUCTION Around the world, there is a demand for larger structures, tall buildings and large bridges. While good footing design is important for all structures, it is even more important in the
Jan 1, 1900
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IC 8662 The Flathead Tunnel - A Geologic, Operations, And Ground Support Study, Burlington Northern Railroad, Salish Mountains, Montana
By Eugene H. Skinner
The 7-mile Flathead Tunnel, located in the central Salish Mountains of northwestern Montana, was constructed between 1966 and 1969, With the contract awarded April 19, 1966, drill and blast tunnel exc
Jan 1, 1974
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Effective multi-dimensional orebody modelling: A key component of the mining value chain
By W. P. Johnstone
The computer assisted generation of geological models to represent the geometry of, and grade distribution within, orebodies is a rapidly growing area of the geological profession. Such models are inc
Jan 1, 2003
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IC 7180 Mercury Poisoning As A Mining Hazard - Introduction
By Sara J. Davenport
With the increased demand for mercury incident to preparations for national defense and the reduction in imports from some of the usual sources owing to war conditions, many small mines in the United
Jan 1, 1941
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Effects of the Mixed Surfactants on Detoxification of Chromium-containing Slag by Achromobacter sp. CH-1
By Lijuan Chen
During the detoxification of chromium-containing slag by Achromobacter sp. CH-1, anionic surfactant Sodium Dodecyl Sulphate(SDS) and its mixed systems with different Tween surfactants(Tween 20, Tween
Jan 1, 2009
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Annual Review 2001 – The United States 2001
By R. F. Balazik
By March 2001, shrinking global markets, reduced consumer spending and declines in domestic manufacturing and industrial output ended the longest economic expansion in US history and pushed the nation
Jan 1, 2002
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RI 2710 Gas Hazards in Street Manholes
By C. H. Kats, E. G. Meiter, J. J. Bloomfield
"INTRODUCTION.Street manholes for underground power and signal circuits, and for sewers vary in size from small openings that a workman can enter, to large central vaults. As the gas hazards in manhol
Oct 1, 1925
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RI 7608 Washability Examinations Of Core Samples Of San Juan Basin Coals, New Mexico And Colorado
By A. W. Deurbrouck
This report describes the washability characteristics of 18 coal samples taken from 11 drill hole cores from the San Juan Basin area of New Mexico and Colorado. The ash content of these coals could ge
Jan 1, 1972
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Climate Change: Risks and Opportunities for Mining and Exploration Companies
By Barbara Hendrickson
Outline ? Canadian Regulatory Update ? Turning the Corner: Background & Status ? Implications of U.S. Waxman-Markey bill for Canada ? Federal-provincial considerations ? Current certainties and
May 1, 2009
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Nanisivik Mine - A Profitability Comparison of Actual Mining to the Expectations of the Feasibility Study
By Neil R. Burns, Michael Doggett
Abstract - The Nanisivik mine offers a unique opportunity to examine the economics of a mining scenario from its original feasibility study through to closure. In the early 1970s, the Strathcona Sound
Jan 1, 2004
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Bulletin 196 Coal-Mine Fatalities in the United States, 1919
By Albert H. Fay
Through the hearty cooperation of the State coal-mine inspectors, the bureau is able to present in this paper a a complete statement of the coal-mine fatalities occurring throughout the United States
Jan 1, 1920
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Technical Notes - Crystallographic Angles for Magnesium, Zinc, and Cadmium (Correction, p. 880)
By Edward I. Salkovitz
THE determination of the orientation of metal single crystals and the studies of plastic deformation are greatly facilitated by the use of the stereographic projection. To draw a standard projection
Jan 1, 1952