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Case Studies Using Mine-Wide Monitoring Systems For Geotechnical Evaluations
By John P. Dunford
U.S. Bureau of Mines researchers are investigating the ability of mine-wide monitoring systems already in place at many coal operations to provide a direct link between geotechnical instruments and th
Jan 1, 1993
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Evaluation of the Point Load Strength for Soft Rock Classification
By B. (Mamas) Das
A project to evaluate the suitability of point Load strength tests for testing and classifying coal measure rocks for coal mining application was initiated by Canada Centre for Mineral and Energy Tech
Jan 1, 1984
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Development Of A Slope Stability Program For Improved Quarry Design
By John Bullock
Limestone and dolomite quarries were mapped to determine specific failure mechanisms for the various geologic and structural conditions. Algorithms for analyzing these mechanisms were incorporated int
Jan 1, 1993
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Development Of A Statistical Technique For Assessing Sandstone Escarpment Stability
By Hamid Maleki
During the last decade, a significant amount of research has been conducted by Energy West Mining Company, government agencies, academia, and consulting companies to develop predictive tools for asses
Jan 1, 2000
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Monitoring For The Evaluation Of The Stability Of Underground Openings
By P. K. Kaiser
The purpose of deformation monitoring for the evaluation of the stability of underground openings is reviewed briefly and some results from laboratory tests of small tunnels are presented. The ground
Jan 1, 1981
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New Methods and Technologies of Roofbolting in Australia Coal Mines
By Mictck Rataj
Methods of rock reinforcement in Australian coal mines are being advanced progressively through the better understanding of rock failure mechanisms around roadways and the-development of improved bolt
Jan 1, 1997
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Evaluation of Anchorage Integrity for Grouted Bolts in Weak Strata
By W. C. Smith
Over the past several years, the Bureau of Mines has conducted studies on the performance of fully grouted resin bolts In underground mines. The effectiveness of resin-grouted bolts in maintaining a c
Jan 1, 1987
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Entry Design For Optimum Stability In A Multi-Seam Environment
By Mohummad Akram
Statistical analysis of multi-seam mining case studies demonstrated that geologic structure and lithological type and sequencing were predominant factors in entry failures. Finite element analysis was
Jan 1, 1993
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A Retrospective Assessment of Ground Control Research and Applications in the Coal Industry
By Daniel W. H. Su
This paper presents a retrospective assessment of ground control research and its successful application by CONSOL Energy over the past 25 years. Recognizing the need to improve the understanding of c
Jan 1, 2011
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A Method For Establishing Site Specific Coal Pillar Design Guidelines
By Winton J. Gale
Coal mine pillar design formulae available to mine planners are typically based on relationships determined for specific site conditions. Application of these methods is difficult when other factors,
Jan 1, 1992
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Drivage System In Retreat Longwall Gateroad
By Kikuo Matsui
In a difficult economic environment, the coal mines in Japan have been making extensive efforts in order to survive by rationalizing the mining operations. Introduction of a new longwall mining system
Jan 1, 1995
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A New Rock Mass Failure Criteria Based On Rate Of Movement
By Hamid Maleki
A new failure criteria is proposed for assessment of roof stability in underground sedimentary rocks. Unlike other stability assessment techniques, this method is simple and practical, having improved
Jan 1, 1990
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Development of a New Roof Bolt Technology to Improve Gate- Road Performance
By Vince Caggiano
The newly developed Hilti OneStep roof bolt combines the standard 5-step anchoring process (i.e. drilling, transfer of drill steel, insertion of resin, insertion of rod and tightening) into one easy o
Jan 1, 2005
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A Risk Assessment Tool For Open Cast Mining In South Africa
Previously, a variety of risk rating systems were used on different mines. However, these were mostly site specific and geology based systems. The purpose of developing a uniform rating system, to be
Jan 1, 2004
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Evaluating Anchorage Mechanisms Of Fully Encapsulated Rock Bolts
By Clare Offner
In 1998, the Australian Coal Association Research Program (ACARP) awarded funding to the School of Mining Engineering at the University of New South Wales to establish a rockbolt testing facility to r
Jan 1, 2000
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Progress In The Knowledge Of Granite Cutting With Diamond Wire (bf80b832-f557-4b46-b5c9-31193e67bf2d)
By A. Bortolussi
The paper discusses the state of the progress reached in the development of the diamond wire tool for cutting hard rocks. To the advances of this relatively new technology a substantial contribution h
Jan 1, 1992
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Towards A Method Of Determining Floor Quality In An Underground Coal Mine
By Jennifer Riefenberg
Underground coal mines often experience ground control problems related to weak floor. Developing a methodology for rating floor quality can aid in understanding and delineating ground hazards. U.S. B
Jan 1, 1995
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Pressure Measurements in the Gob (27227c3c-951c-4108-ba5c-3b6e67d232fb)
By H. Maleki
Gob pressure measurements were made in a Western U. S. coal mine as part of a long-term program to evaluate cave progress and to determine the influence of geological discontinuities on caving conditi
Jan 1, 1984
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An Alternative for More Productive Rib Bolting in Underground Mining Applications
By Joe E. Bryan, John P. McDonnell
"Underground mine rib stability is an ongoing safety issue in all mining applications. Rib-related accidents present at least as many problems as roof-related ground control. Underground coal mine rib
Jan 1, 2015
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Impacts of Longwall Mining on Hydrology, Soil Moisture, and Tree Health in Belmont County, Ohio
By David Bartsch
The Ohio Valley Coal Company (Ohio Valley) has operated the Powhatan No. 6 Mine in Belmont County, Ohio since 1972. Ohio University owns a 455-acre research farm over a portion of the Ohio Valley rese
Jan 1, 2005