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Mobile Roof Support For Retreat Mining
By H. Gene Wilson
Mobile Roof Supports (MRS) look similar to a longwall shield on crawler tracks. The MRS units offer a safe, productive method of extracting the 40% to 60% product left normally unrecovered in room and
Jan 1, 1990
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Assessment of the Rockburst Proneness in Hard Rock Coal Mines
By S. P. Singh
Rockburst is a sudden manifestation of the release of elastic strain energy stored in the rock. Therefore the tendency of the rock to burst should depend upon its ability to accumulate elastic strain
Jan 1, 1986
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Stress Analysis and Support Design for Longwall Mine-Through Entries (A Case Study)
By Keith Heasley
An eastern longwall mine was required to mine through a set of three entries located midway down the length of a panel. Of course, the mine desired to design a successful support system for the mine-t
Jan 1, 2003
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Laboratory and In Situ Results of a Slip Nut Yielding Rock Bolt System
By John D. VandeKraats
Yielding rock bolt systems have been developed to provide ground support while accommodating shifting, creeping, or swelling ground movements. The Dywidag Systems, Inc. (DSI) Slip Nut System is one su
Jan 1, 1998
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Considerations Of Gas Outbursts In Using Dome Salt Mines For Storage Of Oil And Nuclear Waste
By M. Ashraf Mahtab
A feature of interest in stability of excavations in domal salt is the phenomenon of gas outbursts which has occurred in five of the six mines in Louisiana salt domes. Gas outbursts are sudden errupti
Jan 1, 1981
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Ground Control Technology for Mass Exploitation of Coal Deposits with Continuous Miner: A Review of the Indian Scenario
By Sanjay Kumar Singh
This paper presents ground control technology associated with a continuous mining operation for mass exploitation of underground coal deposits in the Indian coal mining Industry It shows that competen
Jan 1, 2011
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Empirical and analytical design of large openings at a proposed national underground science laboratory
By Karl Jr. Zipf
The famous Homestake gold mine in Lead, SD. closed recently alter 125 years of operation. However, the mine may receive a new lease on life as a National Underground Science Laboratory (NUSL) supporte
Jan 1, 2002
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In-Situ Investigation Into The Causes Of Falls Of Roof In South African Collieries
By J. Nielen van der Merwe
The main objective of the research described in the paper was to determine the causes of falls of roof in South African coal mines. The south African Colliery Manager's Association and the member
Jan 1, 2001
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Potential Problems Related To Mining Under Or Adjacent To Flooded Workings
By Stanley J. Michalek
Good planning is critical to operating a safe and efficient mining operation. As the shallow coal scams become depleted, attention turns toward deeper mineable seams or remnant coal reserves. It is be
Jan 1, 2000
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Influences of Longwall Subsidence on a Guyed Steel Tower - A Case Study
By Yi Luo
The potential influences of mining subsidence on structural stability, integrity and functionality of guyed tower structures have not been systematically studied before. This paper presents a ease stu
Jan 1, 2003
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Modelling Of Pillar Stability In Room And Pillar Mines
By Douglas Morrison
By applying modern 3D numerical modelling techniques to the analysis of a pillar cascade failure in a room and pillar mine, it has been possible to simulate the collapse and develop an understanding o
Jan 1, 2003
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Evaluation of Pillar Recovery in Southern West Virginia (0e64fb3d-0c07-4638-b455-a16004535ca1)
By Chris Mark
Pillar recovery continues to be a significant ground control hazard. During the past decade, 10 miners were killed during pillar extraction operations in southern West Virginia. Studies conducted duri
Jan 1, 2002
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How to Design an Efficient Roof Bolting Plan Based on Simple In-Mine Measurements
By C. J. H. Brest van Kempen
The techniques developed should provide a useful tool, not only during the initial formulation of a suitable bolting plan for a new section, but also for periodic check¬ing on the utilization factor
Jan 1, 1986
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Longwall Surface Subsidence Prediction Through Numerical Modelling
By Noor Mohammad
Comprehensive numerical modelling of the subsidence associated with longwall mining in UK Coal Measures strata has been conducted and validated against UK data. The Rock Mass Classification System (RM
Jan 1, 1997
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Rock Mechanics Study Of Lateral Destressing For The Advance-And-Relieve Mining Method (2bf3b56c-1393-4658-a2e4-6e9ace0d24dd)
By Hamid Maleki
The advance-and-relieve method benefits from lateral destressing associated with mining in laminated rocks and a high horizontal stress regime. This stress control method is based on measurements show
Jan 1, 2003
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Controlled Thrust And Torque Placement Of Mechanical Anchor Bolts And Their Relationship To Improved Roof Control
By Anil Mahyera
Under contract to the Bureau of Mines, a roofbolting machine has been developed which will: control torque on the bolthead to within 4 percent of a set point, control thrust to a low level (150 lbf),
Jan 1, 1981
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Hydrogeologic Effects Of Subsidence At A Longwall Mine In The Pittsburgh Coal Seam
By Leslie Carver
The effects of longwall mine subsidence on water resources were studied at a West Virginia coal mine (mine Z) by Carver (1994). Data were obtained for 137 domestic supply wells and springs and 12 base
Jan 1, 1994
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Effects of Panel Mining Sequence and Retreat Direction on the Roof Stability of Longwall Headgate Entries
By Jinsheng Chen
The major functions of longwall headgate entries are to provide access ways to the outby submains or mains for coal transportation and to the longwall face for fresh air and for transporting men and m
Jan 1, 1998
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Polymer Membrane Liners In Underground Coal Mines - Ground Control For The Millenium?
By David C. Laurence
in March 1999, the School of Mining Engineering at the University of New South Wales carried out a series of underground trials using " Evermine", a South African developed two-part water based polyme
Jan 1, 2000
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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