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How to Mitigate Coal Mine Bumps Through Understanding of the Violent Failure of Coal Specimens
By Gamal Rashed
This research is divided into two parts: the first part of this research focuses on understanding coal mine bump mechanisms, and the second part focuses on mitigating the violent failure associated wi
Jan 1, 2013
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Estimating Rock Strengths Using Drilling Parameters During Roof Bolting Operations - Progress Report
By Yi Luo
Accurate mechanical and geological information of the roof strata is vital for roof bolting design in underground mines. In order to obtain such information in a timely manner, a research has been und
Jan 1, 2002
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Downhole Overcoring Stress Measurement at a Western Underground Coal Mine
By David Conover
Knowledge of the magnitude and direction of the horizontal secondary principal stresses is a critical factor in designing the layout and mining sequence of underground openings. Typically, horizontal
Jan 1, 2004
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Ground Control Criteria for Coal Reserve Optimization in Multiple-Seam Mines
By Eric Westman
Ground control problems caused by multiple-seam interaction frequently sterilize coal reserves. Interaction mechanisms differ for overmining and undermining and are controlled by mining, spatial. and
Jan 1, 1997
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Analysis Of Major Failure Through Integration Of Static And Dynamic Rock Mechanics Investigation
By K. Y. Haramy
Rock burst and coal mine bump research using static and dynamic rock mechanics instrumentation has been conducted for several decades. Research efforts typically have been conducted using static instr
Jan 1, 1988
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Root Causes of Groundfall Related Incidents in U.S. Mining Industry (2ced207f-73e6-4ab3-8c4e-7a683f4eb75c)
By Kousick Biswas
The main objective of occupational health and safety research is to minimize or eliminate the events that may cause fatal or non¬fatal injuries to human workers. A commonly used technique is to devise
Jan 1, 2003
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Highwall Augering In Ultra-Thick Western Coal Reserves: Unique Geotechnical And Operational Challenges
By Timothy Ross
The Pittsburg & Midway Coal Mining Co.'s Kemmerer Mine is one of the deepest surface coal operations in the world, with the highwall extending to approximately 1,000 ft above the pit floor. To in
Jan 1, 1999
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Effect of In Situ Stresses on the Stability of Coal Mine Development Workings
By Murali Gadde
Among different types of ground control problems associated with underground coal mining, those related to in situ stresses are the most common ones affecting the safety and economy of a mining operat
Jan 1, 2004
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Shear Mechanism for Mining-Induced Fractures Applied to Rock Mechanics of Coal Mines (26fab274-0576-48ca-b03a-d4a9f18550cb)
By Brian White
Two examples of en echelon mining-induced fractures seen in hard¬rock mines provided a basis for inferring that fracture zones and bedding plane separations immediately surrounding mine openings are p
Jan 1, 2002
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Economic Evaluation Of Subsidence Damage Mitigation Techniques
By David C. Johnson
Coal mining in Illinois has resulted in many structures being exposed to subsidence damage. Damage mitigation techniques (DMT) applied in the foundation design/construction have proven successful in m
Jan 1, 1993
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Status Of Longwall Research In CSIRO
By Michael Kelly
Current research in longwall mining in CSIRO Exploration & Mining is focused within five major projects and several minor projects. The major projects are: 1 3D Aspects of Longwall Geomechanics. Th
Jan 1, 2001
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A Method for the Selection of Rock Support Based on Bolt Loading Measurements
By Stephen P. Signer
A method to assist in the evaluation and selection of roof bolts using in situ measurements of roof bolt loading has been developed by researchers of the Spokane Research Center, National Institute of
Jan 1, 1997
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Volumetric Measurement of Rock Movement Using Photogrammetry
By Stephen R. Iverson, Jeffrey C. Johnson, Donovan J. Benton, Michael J. Raffaldi, Lewis A. Martin
"The NIOSH ground control safety research program at Spokane, Washington, is exploring applications of photogrammetry to rock mass and support monitoring. This paper describes two ways photogrammetric
Jan 1, 2015
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Investigation Of Pillar-Roof Contact Failure In Northern Appalachian Stone Mine Workings (55897abb-5ce0-4661-bf26-04d03fe5d67b)
By Gabriel Esterhuizen
The roof rock in underground limestone mines in Northern Appalachia can be subject to high horizontal stresses in spite of the shallow depth of the workings. The high stresses can cause roof stability
Jan 1, 2004
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Strata Mechanics Of Pillar Extraction Goaf Edges (001afab8-c7ac-48fa-af96-b8de57c1318e)
By John Shepherd
Pillar extraction carried out using various methods (split and lift, Wongawilli and old Ben) involves the formation of narrow fenders (commonly 7 m of coal) formed by driving "splits" for lifting off
Jan 1, 1992
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Critical Roof Span Approach To Selection Of Proper Coal Mine System
By Antoni Kidybinski
Coal mining both with longwall and room-and-pillar method often encounters severe operational difficulties due to had roof conditions. Rooffalls at entry cross-cuts or along the rib line in longwalls
Jan 1, 1982
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Mine Convergence When Using Mobile Roof Supports In Pillar Recovery
By J. R. Stoltz
To date, there has been limited formal research dealing with the use of Mobile Roof Supports (MRS) for pillar recovery. This paper, which is a portion of a larger project, presents convergence data fr
Jan 1, 1999
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Design Factors In Near-Seam Interaction
By A. Grenoble
The mining of seams in close proximity can greatly accentuate interaction problems. At distances of less than 110 feet vertically interaction can occur for both over and under mining. Research into gr
Jan 1, 1984
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Hydraulic Fracturing Of Sandstone And Longwall Roof Control - Implementation And Evaluation
By D. W. H. Su
Following a roof fall in the B12 headgate of a CONSOL Pennsylvania Coal Company (CCPC) underground coal mine in February 1998, CONSOL R&D and Exploration initiated an underground roof geology reconnai
Jan 1, 2001
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Load Deformation Behavior Of Simulated Longwall Gob Material
By Deno M. Pappas
The purpose of this U.S. Bureau of Mines study was to determine the material stiffness properties of the gob for use in numerical models of rock mass response to longwall mining. Photographs of actual
Jan 1, 1993