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The research on the mechanical properties of hard roof in underground coal mining
By Xu Lin Sheng
During the mining course, when the roof above coal seams is constituted by thick and hard sandstone (conglomerate), sudden roof movements often take place with great force and de¬struction which is th
Jan 1, 1989
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A Practical Solution to Highwall Mining Coal Reserves Sterilized by Auger Mining
By Michael Amick
Over the last few years as the coal industry has seen an increase in the price of coal, a renewed interest in the additional mining of pre-law highwall sites has occurred. Much premium coal and pro
Jan 1, 2007
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Coal Mine Burst Prevention Controls
By Anthony Iannacchione
Coal mine bursts have represented a major hazard for U.S. mining operations for more than 90 years. During this time, many prevention controls have been developed and tested. This paper reviews 11 p
Jan 1, 2008
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Design Of Longwall Extractions Under Flooded Abandoned Workings In The Sydney Coalfield
By Peter Cain
Longwall extraction in the Phalen Scam in the Sydney Coalfield of Nova Scotia is carried out under flooded abandoned workings in the Harbour Seam 140 m above, and at depth of up to 700 m beneath the A
Jan 1, 1996
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The Significance of Specimen Stiffness and Post Yield Characteristics on Passive Roof Support Design
By Thomas M. Barczak
The intent of this paper is to make mine operators and engineers aware of parameters which affect the loading behavior of passive roof support systems. The strength of a passive roof support element a
Jan 1, 1987
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Identifying Moisture Sensitive Roof Rocks in Coal Mines
By Gregory M. Molinda
Historically, miners have known that roof rocks originally composed largely of mud were prone to slaking and deterioration when exposed to water and humidity. Mine Safety and Health Administration (M
Jan 1, 2006
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Upgraded Comprehensive and Integrated Subsidence Prediction Model CISPM - W
By Yi Luo
In dealing with various subsidence cases, accurate predictions of mining induced subsidence are the basis for correct assessment of subsidence influences and subsequent mitigation efforts. There is a
Jan 1, 2008
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Geomechanical Support Of Adaptive Mining Technology
By I. V. Baklashov
Geomechanical conditions of mining operation are determined by varying in time and space mechanical properties and initial state of the rock mass, by geological and technological factors. We define ad
Jan 1, 1996
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Development and Application of Geotechnical and Rockmechanical Standard Planning System for Roadway Development in German Coal Mines
By K. H. Brandt
A standard planning system for the development of roadways was adopted for German coal mines based on the results of geotechnical and rockmechanical investigations. Its goal is to provide for sufficie
Jan 1, 2004
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Improved Source Location And Evaluation Of Seismic Events Over A Deep Coal Mine
By D. S. Choi
This paper describes an improved source location technique for microseismic events related to coal mining. A system of non- linear distance equations is solved with the use of the Newton-Raphson metho
Jan 1, 1990
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Three-dimensional FEM analysis to sale field measurements from deep mine accessways
By M. J. Beus
A shaft is truly the "lifelinen of an underground mine. Damage to the shaft lining and guides as a result of ground movement can result in serious loss of production and extensive and continual repair
Jan 1, 1989
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Five Stress Factors Conducive To Bumps In Utah, USA, Coal Mines
By Joe F. T. Agapito
High stresses and adverse geology in deep coal mines in the state of Utah, USA, have caused numerous bumps. The larger bumps have been associated with seismic events with Richter magnitudes of 3.6 and
Jan 1, 2000
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Investigation of the Stability of a Pillar Retreat Section at the Fletcher Mine
By Doug Tesarik
Researchers from the National Institute for Occupational Safety and Health1 (NIOSH), together with employees from The Doe Run Company, are monitoring and evaluating the stability of a pillar retreat s
Jan 1, 2006
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Physical Simulation of Overburden Movement and Stability of Aquiclude in Shallow Seam Mining
By Qingxiang Huang
Shallow seam coal field has the largest coal reserve in China. Mining in shallow depth causes serious problems. One of them is subsurface dewatering. In this paper, the physical simulating model was p
Jan 1, 2006
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Comparative Study Of Western US Longwall Panel Entry Systems
By Khamis Y. Haramy
This paper summarizes ground control studies of longwall panel entry systems in two Western U.S. coal mines. Presented are comparisons of in situ pressure change measurements and assessments of chain
Jan 1, 1989
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Work Practices to Manage Bump Prone Ground
By Floyd Varley
In deep and highly-stressed coal mining, advanced design practices are used to minimize the potential for damaging events to occur. Despite these design efforts, the hazard of coal mine bumps can not
Jan 1, 2008
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Effects of Rock/Coal Interface Property on Coal Pillar Strength
By Jun Lu
There are many factors affecting the strength of pillar, including width-to-height (W/H) ratio, mechanical properties of coal and surrounding rocks, property of partings in the coal, and the interface
Jan 1, 2008
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Drainage Of Water From Abandoned Mines By Horizontal Drilling
By Alan J. Zeni
Drainage of water from abandoned underground mines has become important in recent years because of safety concerns when mining near abandoned works or reentering abandoned mines for further developmen
Jan 1, 1990
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An Application Of Fem Back Analysis Method To Mine Roadway
Knowledge of initial ground pressures or in-situ stresses and mechanical properties and geological conditions is of great importance in drivage and maintenance of a mine roadway. Field measurements
Jan 1, 1990
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Effects of In-seam and Near-seam Conditions and Asymmetric Pillar Loading on Coal Pillar Strength
By Daniel W. H. Su
The importance of incorporating fundamental principles of rock material response and failure mechanics into a pillar strength design model has been demonstrated. To accurately assess pillar strength,
Jan 1, 1997