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Identification Of Factors Affecting Horizontal Displacement In Subsidence Process
By Yi Luo
In the study of the topographical effects on surface movement due to underground longwall mining, the factors that affect the incremental horizontal displacements are identified using 10 collected cas
Jan 1, 1996
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Crinum Mine 15 Longwalls in Weak Roof What Did We Learn about Supporting the Ground?
By Dan Payne
The Crinum mine has recently completed workings in the southern area of the mine. Over the 10 years of longwall production 40 million tonnes have been extracted and the mine has experienced over 40 lo
Jan 1, 2008
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In-Seam Seismic Tomography Mapping Application To Coal Mining Problems
Continuing with the effort of providing new and more effective exploration methods to the mining industry, where direct methods (drilling, cross-cutting, etc.) are not applicable, either for logistica
Jan 1, 1996
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Comparison of the Performance of Active and Passive Roof Bolts in An Illinois Basin Coal Mine
By Anil K. Ray
This paper discusses in situ studies conducted at an Illinois Basin room-and-pillar coal mine to evaluate the performances of three different types of bolts under similar geologic conditions. The bolt
Jan 1, 2012
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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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Analysis Of Rockbolt Performance At The Waste Isolation Pilot Plant
By Liane J. Terrill
Rockbolt failures at the Waste Isolation Pilot Plant have been recorded since 1990 and are categorized in terms of mode of failure. The failures are evaluated in terms of physical location of installa
Jan 1, 1995
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Comparison Of Predictions And Measurements Of Subsidence Caused By Underground Mining In Northern Appalachia
By H. J. Siriwardane
This paper presents results from three case studies involving longwall mine panels at which the measured ground movements were compared with the numerical model predictions based on the finite element
Jan 1, 1988
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Study Of Coal Fragmentation Under Conical Bit Indentation (151fd177-8c94-4b7d-bb78-001df228dd2a)
By S. J. Jung
A fundamental study of fragment size distribution and characteristics of fracture pattern is presented for the dynamic penetration of a conical bit into coal block. In this paper, damaged zones during
Jan 1, 1989
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Application Of Seismic Tomography In Underground Mining
By D. F. Scott
Seismic tomography, as used in mining, is based on the principle that highly stressed rock will demonstrate relatively higher P-wave velocities than rock under less stress. A decrease or increase in s
Jan 1, 1996
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Risk Assessment of Surface Fracture Endangered Ranges Over Shallow Mine Workings
By Peter Fischer, Heinz-Jiirgen Kateloe, Anton Sroka, Axel Preusse
"Since mining in Germany has a long history, there are still many locations where the surface fracture problem has to be solved. Shallow mine workings from an earlier era can affect the surface in a d
Jan 1, 2010
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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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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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Catastrophic Failures of Underground Evaporite Mines
By Jeff Whyatt
Deformation of underground salt, trona and potash mines is generally time dependent, providing for gradual adjustment of strata to mining induced stresses. Time dependence can allow for higher extract
Jan 1, 2008
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Cable Support Systems For Longwall Gate Road Stability
By Stephen C. Tadolini
The U.S. Bureau of Mines, in cooperation with the Cyprus- Plateau Mining Company, has conducted research to provide an alternative to traditional secondary support systems in a two-entry, yield pillar
Jan 1, 1995
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Time Dependent Roof Deterioration At A Central Ohio Coal Mine (b0f3bbeb-91e8-4a62-8116-5f9e444a047e)
By Ted Klemetti
Roof deterioration in weak moisture-sensitive rock leads to roof falls in coal mines. An observation site was set up in intake air at an underground coal mine in central Ohio to evaluate the time-dep
Jan 1, 2009
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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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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
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Geomechanic Monitoring And Distributed Information Systems
By G. I. Gritsko
In this paper we consider the elements of a distributed information geomechanic monitoring system which is used in computerized mine planning and mining operations control. The automated system is a t
Jan 1, 1996
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Pillar Stability Issues Based on a Survey of Pillar Performance in Underground Limestone Mines (08bccb54-5d4b-443a-860e-90b5a6841ec3)
By Gabriel S. Esterhuizen
A survey of pillar conditions was carried out at 21 operating limestone mines that use the room-and-pillar method. The surveyed pillars were all located in rock that was classified as ?Good? to ?Very
Jan 1, 2006
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Rib Support Innovation At Daw Mill Colliery (a22a0861-1502-4d3d-a2cd-8a6ba0c13271)
By Jon Bowler
Daw Mill Colliery, UK Coal, near Coventry in England, mines the Warwickshire Thick Seam at 800 m/2500 ft depth using longwall retreat with gateroads supported by rockbolts. Over the last eight years
Jan 1, 2009