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Field Measurements Of Overburden And Chain Pillar Response To Longwall Mining (22054dce-c5fa-459f-94f1-b6ef58bd87bf)
By Daniel W. H. Su
This paper presents the results of an extensive geomechanical testing and monitoring program conducted at a longwall panel. The field program included the monitoring of roof caving sequence and mechan
Jan 1, 1987
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Analysis of Roof Falls at and Recommendation of Roof Control Plansfor Rofomex Posphate Mine
By Jinsheng Chen
For underground openings, many factors can cause roof failure and thus roof falls. The most common factors related to Mother Nature are weak roof lithology, geological structures, and an abnormal in-s
Jan 1, 2011
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Structure, Strength And Relaxation Of Interbuden For Input Into Highwall Mining Design In The Baralaba Coal Measures Of Queensland, Australia
By Bret E. Leisemann
The geomechanical environment in which highwall mining must operate represents a hybrid between surface and underground operations. Mine design must take into consideration the complexities associated
Jan 1, 1993
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Subsidence Studies In Thick And Steep Coal Seam Mining
By M. Y. Fisekci
This paper concentrates on subsidence measurements, applied over the thick and steep seam mining in the Rocky Mountains Region of Western Canada. The studies to date indicate that two new subsidence m
Jan 1, 1981
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Design Of Shield Supports For The U.S. Coal Mining Industry
By Alan Peacock
Shield supports have been in use in the USA underground mines since 1975, and their development in the intervening time has been progressive and inovative. Specialized techniques are used to optimize
Jan 1, 1981
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A Cooperative Study Of Gate Entry Designs Welbeck Colliery (UK) And Jim Walter Resources (USA)
By Greg Hendon
Longwall developments in the UK have historically consisted of single entry gate roads. Adjacent developments were separated from existing panels by large barrier pillars (designed of sufficient width
Jan 1, 1995
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Landslide Occurrence and Causation in Steep Slope Areas of Appalachia
By David Newman
Landslides and soil creep often occur with varying degrees of severity on steep slopes within Southern Appalachia. Ground movement may take place over years with subtle changes in topography and veget
Jan 1, 1998
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Ground Control And Safety Considerations During Longwall Recovery
By William J. Gray
The Roof Control Division of MSHA's Pittsburgh Safety and Health Technology Center has been conducting a program to evaluate methods employed by the U.S. coal mining industry during recovery of l
Jan 1, 1993
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Monitoring For The Evaluation Of The Stability Of Underground Openings
By P. K. Kaiser
The purpose of deformation monitoring for the evaluation of the stability of underground openings is reviewed briefly and some results from laboratory tests of small tunnels are presented. The ground
Jan 1, 1981
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Calculating the Mining-Induced Horizontal Deformation Indices
By Krzysztof Tajdus
In Europe, horizontal strain is a primary parameter for estimating building hazard resistance. Other measured indices, like curvature, are less important, since in most cases of European excavation de
Jan 1, 2011
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Drag Picks - Influence Of Tool Geometry And Angle Of Arrack On The Stress Evolution And Cutting Efficiency
During the last decade mechanical rock excavation has become increasingly widespread in the mining industry and, more in general, in excavation engineering. This technology, especially the tools and t
Jan 1, 1990
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Automation Of A Progressive Failure Procedure For Analysis Of Underground Mine Pillar Designs
By N. P. Kripakov
The U.S. Bureau of Mines (USBM) is conducting research to develop a practical computer-based tool that will allow coal mine planners to anticipate rock mass behavior surrounding mine entries prior to
Jan 1, 1994
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The Use Of Cribless Tailgates In Longwall Extraction
By Russell Frith
The paper defines the various operational advantages associated with the use of cribless tailgates during longwall extraction and considers the associated ground control issues that need evaluating to
Jan 1, 2000
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Subsidence Prediction Influence Assessment and Damage Control
By Y. Luo
An extensive subsidence research program conducted by the authors has greatly improved the accuracy and the capabilities of subsidence prediction under complicated mining and surface conditions. The t
Jan 1, 1997
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Application of geotechnical and geophysical parameters to improve planning reliability in roadway drivage
By Nikolaos Polysos
To drive and utilise gate roads economically requires accurate planning and risk assessment considering the variable geomechanical requirements. The geomechanical part of roadway planning is secure
Jan 1, 2002
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Roof Bolting Application In Longwall Mining In Indonesia And Japan
By Herryal Anwar
The application of roof bolting technology to control the stability of roadways in coal mining within weak strata or under high ground pressure has improved progressively. One of several factors that
Jan 1, 1999
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Rock Compaction Caused By Dewatering In Poorly- Consolidated Sandstones
By Hamid R. Nikraz
This paper reports the finding of a comprehensive investigation carried out to evaluate the compaction characteristics of saturated sandstone aquifers in the Collie Coal Basin under conditions anticip
Jan 1, 1993
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Effect of the Approaching Longwall Faces on Barrier and Entry Stability
By Klaus-Dieter Beck
RAG American Coal Holding, Inc. affiliates operate two longwall mines in the Pittsburg seam in Pennsylvania, the Cumberland mine and the Emerald mine. A unique situation in longwall operation occurred
Jan 1, 2004
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Evaluation of Instrumented Cable and Rebar Bolts as Ground Support at a Trona Mine (958ba3b7-4ed1-4b81-9815-5e4d6ebd9ea2)
By Lewis A. Martin
Instrumented cable bolts developed at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health were used in conjunction with existing ground control systems to moni
Jan 1, 2001
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GIS Supported Evaluation of Surface Level Impacts Due to Abandoned Near?Surface Mine Locations
By Alexander Kattner
Surface fractures in urbanized areas show the risk potential of near-surface mining. This kind of mining subsidence damage occurs mainly in areas where hard coal was mined near the surface with very l
Jan 1, 2011