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Successful Application of Rock Bolt Support and Mechanised Depillaring in Difficult Roof Conditions at Tandsi Mine, Western Coalfields, India
By D. C. Oldroyd
Western Coalfield?s Tandsi Mine, has difficult support conditions and a history of roof falls, resulting in mining roadway widths and depths being restricted for safety reasons. Rock Mechanics Technol
Jan 1, 2006
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The Evolution of Intelligent Coal Pillar Design: 1981-2006 (550072c4-5cb4-4845-a20b-da35141e93d6)
By Christopher Mark
The first International Conference on Ground Control in Mining opened with the topic of pillar design. Two classic papers were presented, one by Bieniwski and the other by Wilson. Unfortunately, the
Jan 1, 2006
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The Development and Application of Polyurethane Injectable Cable Bolts
By Dakota D. Faulkner
Cable bolts have been very effective in mine ground control. Non-tensioned and tensioned cable bolts are now used for both primary and supplemental bolting (Suder, 2001; Mirabile, 2010). In the United
Jan 1, 2012
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Track Entry Deformation Subjected to Longwall Mining in the Overlying Seam: a Case Study
By Wenbing Xie
At Renlou Coal Mine, Huaibei Mine Area, the track entry deformed significantly after longwall mining in an overlying multiple seams. The supporting characteristics of primary roof bolts and shotcrete
Jan 1, 2012
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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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Impact Of Vertical Stress On Roadway Conditions At Dartbrook Mine
By Ken Mills
A program of stress change and roadway deformation monitoring was undertaken to measure the forward abutment load distribution about a retreating longwall panel at Dartbrook Mine. The results of this
Jan 1, 2000
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Application Of A Simplified Three-Dimensional Roof-Pillar-Floor Interaction Analysis Model For Subsidence Prediction
By Witold M. Pytel
A simplified, three-dimensional, time-dependent, mechanistic model of the overburden-coal seam-floor interaction has been developed and validated at two Illinois coal mines. The model based on the thi
Jan 1, 1992
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Roof Stability Issues in Underground Limestone Mines in the United States (c7025d3b-53e9-40eb-abd5-d6a28b7f51f3)
By Gabriel Esterhuizen
The room-and-pillar mining method is used extensively in underground limestone mines in the Eastern and Midwestern U.S. The rock mass is typically a near-horizontal, bedded deposit at relatively shal
Jan 1, 2007
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The Roof Behavior of a Longwall Tailgate Under Massive Sandstone Strata
By Yemi Akinkugbe
Underground coal mining under massive sandstone can present significant challenges if the roof behavior is not well understood. This paper presents a classic cantilever bending/flexing behavior of a l
Jan 1, 2007
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Feasibility Study And Design Of A New Underground Coal Mine Developed From Open Cut Highwall In Indonesia (25d3d094-fa9d-4970-a166-6a4fe20badce)
By Takashi Sasaoka
About 200 M tons of coal were imported into Japan in 2007 and Indonesia was its second largest exporter, accounting for about 30 M tons (12% of the total imported coal). Indonesia produced about 200 M
Jan 1, 2009
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Coupon Testing for Field Assessment of Stress Corrosion Cracking of Rock Bolts
By Damon P. Vandermaat
Coupon testing allows for the rapid understanding of a material?s likely behavior in service conditions, allowing engineers and operators to make informed decisions about the likely service-life of pa
Jan 1, 2012
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Experimental and Numerical Study of Double Shearing of Bolt under Confinement
By Naj Aziz
The shear behaviour of reinforced rock joints is investigated for the bolt-grout-rock interaction and for failure mechanism. The effectiveness of the bolt application under lateral and axial loading c
Jan 1, 2007
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Stability Mapping To Examine Ground Failure Risk: A Field Study At A Limestone Mine (b0d73e07-1fdd-41b0-ab9e-b3e15e89a17e)
As the surface reserves are being depleted, more and more stone operators are seeking underground mining options. Stability of underground openings is a major concern for the safety and productivity.
Jan 1, 2009
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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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Effects of Specimen Age on the Uniaxial Compressive Strength and Moisture Content of Weak Coal Measure Rocks
By Timothy Barton
The uniaxial compressive strength (UCS) is the most fundamental measurement used in geotechnical rock characterization for mine design. While there are standardized procedures for how to conduct UCS
Jan 1, 2008
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Analysis of Multiple Seam Stability
By Christopher Mark
Multiple seam interactions are a major ground control hazard in many U.S. underground coal mines. The two most common types are: ? Undermining, where stress concentrations caused by previous ful
Jan 1, 2007
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Numerical Modelling of the Range of Rock Fracture Zone Around Gateroads on the Basis of Underground Measurement Results (edbcb7c0-6a88-4056-904b-d121adf0097c)
By Andrzej Walentek
This paper presents the results of numerical modeling of the fractured zone around longwall gateroads. The numerical computations have been based on the results of underground measurements of the frac
Jan 1, 2009
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Techniques To Investigate Subsidence Events Over Inactive Room-And-Pillar Mines (f8b483c2-2524-4334-950b-cd6315d7aeaa)
By Yi Luo
Subsidence events occurred over inactive room and pillar (R&P) mines, including abandoned mines or sealed portions of active mines, are classified as unplanned subsidence because of their timing and d
Jan 1, 2009
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Analysis of Extensometer Data from a Room Widening Experiment Designed to Induce a Roof Fall
By Dennis R. Dolinar
Roof falls, even of supported roof, still constitute a major hazard in underground mines. However, associated with any fall or instability is a pattern of roof movement. Therefore, the National Instit
Jan 1, 1997
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Determination Of Horizontal Stress Direction By Underground Mine Mapping (2f4eaf66-10ce-4f4d-9f7a-64c6c21e6400)
By S. E. Phillipson
Underground mine mapping is a critical component of understanding the controls on ground instability. Many relatively localized examples of ground failure are associated with geologic features, such
Jan 1, 2009