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Guidelines for the Management of Rock Related Instability in Strip Mines, AngloCoal, South Africa
By Trevor Rangasamy
Technically based guidelines for managing rock related risks associated with strip mines in South African collieries are currently vague and are to a large extent based on experience and trial and err
Jan 1, 2008
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Subsidence and Uplift Prediction in German and Polish Hard Coal Mining
By Axel Preusse
For the last 150 years, subsidence damage to the surface has been an unavoidable phenomenon associated with underground coal mining. In particular, the mechanization of mining methods in multiple seam
Jan 1, 2012
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Subsidence Prediction From The Beginning - Collie Coal Basin (Western Australia) (dce863fc-d411-440e-9991-cfa750adc084)
By Ian Misich
Surface subsidence resulting from "total extraction" of coal in the Collie Basin first occured in 1987 when Western Collieries Ltd trialed the Wongawilli mining method. Because very little quantitativ
Jan 1, 1992
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Characteristics of Seismic Field Generated by Bed Separation and Application Seismic Technique for Exploration of Bed Separation and Grouting Research
By Jiulong Cheng
Underground coal mining causes overburden deformation and failure, one major form of which is bed separation in the overburden. Surface subsidence can be controlled by injecting grout into the bed sep
Jan 1, 2006
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Gate Entry Design For Longwalls Using The Coal Mine Roof Rating
By Chris Mark
Successful longwall mining requires a stable tailgate entry. Gate entry performance is influenced by a number of geotechnical and design factors, including: - Pillar size and pillar loading; - Ro
Jan 1, 1993
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Historical Perspective And Future Projection Of Longwall Mining In The United States (19eaaffe-326c-46a4-9a81-dc104b2df560)
By Thomas M. Barczak
This report chronicles the historical development of longwall mining in the United States and speculates on future developments to the turn of the century. Five eras of technological development durin
Jan 1, 1992
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The Design And Application Of Hercules Cribs For Underground Mining
By Mike Faure
Hercules cribs make use of timber loaded parallel and perpendicular to the grain. Maximum use is made of the orthotropic properties of timber resulting in crib- having superior strength, high initial
Jan 1, 1993
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A Method For Assessing The Potential Of Mine Subsidence At Abandoned Mine Sites Through The Assistance Of Finite Element Modeling
By Richard E. Bischke
Computer assisted finite element model analysis, originally developed to study stress distributions in aircraft, has been modified into a versatile mining program, that can be used to assist the engi
Jan 1, 1984
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Knowledge Is Power: Introducing the Midas, a New Permissible Datalogging System for Use in Mines
By Tristan H. Jones
Beginning in 1987, miniature dataloggers approved by the Mine Safety and Health Administration (MSHA) were publicly available for sale. The principal among these was the model CR21XQM, manufactured by
Jan 1, 2012
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Stability of Slopes in Discontinuously Jointed Rock (4d3fd7d1-f3a8-44f5-b86c-03d96a9b1123)
By T. M. Tharp
Attempts to analyze the stability of slopes, foundations and underground openings in discontinuously jointed rock have generally assumed full joint continuity or ignored the role of stress concentrati
Jan 1, 1984
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The Extraction of Main Heading Pillars with a Longwall at Nre Wongawilli Colliery
By Ry Stone
To maintain longwall continuity, NRE Wongawilli Colliery extracted the approximately 20-year-old Thompson Mains and in doing so, 20 roadways were holed into during longwall retreat. The orientation of
Jan 1, 2012
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Relocating Mining?Induced Seismicity at the Trail Mountain Mine
By Meagan S. Boltz
From October 2000 to April 2001 a local array of fourteen seismograph stations was deployed at the Trail Mountain Mine (TMM), an underground coal mine in Emery County, Utah, to locate mining-induced s
Jan 1, 2012
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Influence Of Cutting Sequence On Development Of Cutters And Roof Falls In Underground Coal Mine (e70fc8d5-b1f5-424b-b360-729cb6e50081)
By Anil K. Ray
Roof falls are one of the greatest hazards in underground coal mines worldwide. Due to stringent safety measures and extensive support system development, roof falls have been reduced significantly bu
Jan 1, 2009
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Ground Control Design Challenges At The El Boleo Copper Project (fe854eab-fde5-445c-8a43-3f4fce2f58ca)
By David Conover
The El Boleo Copper Project is currently in the final design stages for development of a 3-MM-tonne/yr underground copper mine located in Baja California, Mexico. The nearly horizontal mineralized zo
Jan 1, 2009
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Ground Movements Associated With Pillar Extraction Coal Mining In Northern West Virginia (38f818ad-9d3b-4ecb-b624-667cef121309)
By Robert W. Bruhn
An investigation was male of ground response to pillar retreat mining in a 1.7 meter thick seam at 108 meter depth at a site in northern West Virginia. This paper describes mining-related stress chang
Jan 1, 1984
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Sub-Surface Ground Movements Associated With Longwall Mining
By P. Gaskell
The paper examines the development of rock movement between a longwall extraction horizon and the surface for a fully caved mining situation. Physical modelling has been used to examine the mechanics
Jan 1, 1988
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The Next Generation of Cable Bolts for Improved Ground Support
By Stephen C. Tadolini
PC-Strand tendons, commonly referred to as cable bolts, have become a major rock reinforcement device for underground mining and civil applications. The most common configuration is a 1+6 strand, whic
Jan 1, 2012
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Control Of Roadway Closure In Underground Coal Mines By Sidewall Weakening Technique
One of the problems associated with the maintenance of roadways in underground coal mines is that of dealing with roadway closure. Sidewall weakening technique is based on the transference of the h
Jan 1, 1990
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Field Test Results On Dyna-Rok And Dyna-Rok Plus Anchors
By James J. Scott
Research and development has been carried out on the patented Dynamic Rock Anchor, tradenamed DYNA-ROK and DYNA-ROK PLUS Anchors, which are manufactured and marketed by Ingersoll-Rand Company. This pa
Jan 1, 1990
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Strata Management with Ground Behavior Assessment for Mass Exploitation of Coal Deposits: A Case Study of Continuous Miner
By Sanjay Kumar Singh
The mechanics of load transfer in bord-and-pillar mining is not well understood despite the evolution of the art of pillar extraction over the last 20 years via trial and error (empirical) or Rock Mas
Jan 1, 2012