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Application Of Polyurethane Injection For Rehabilitation Of The Maingate Of A Deep Single Entry Longwall Mine
By Kevin MacPherson
After 34km of roof bolted drivage the first fall of ground occurred at the Phalen Colliery in the maingate of the 8th East longwall panel. The fall occurred over the stage loader as the wall approache
Jan 1, 1999
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The Impact Of Variability In Coal Strength On Mine Planning And Design - A Case History
By David A. Newman
Strength and physical property testing of coal is conducted regularly by the Arch Mineral Corporation as part of reserve exploration. Pillar design and mine layout are the primary applications for the
Jan 1, 1993
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Ground Control Techniques Utilizing Polymer Grid Structures (6a308b5b-e28a-436d-9aed-f102a6943d1b)
By Brian E. Travis
Lightweight polymer grids have recently been introduced to the mining industry. They are currently being used for roof and rib control, longwall shield recovery, safety guarding or barricade, highwall
Jan 1, 1992
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International Conference On Ground Control In Mining Design Of Three-Entry System For Super Longwall Panels
By J. D. Cole
In order to reduce the number of longwall face moves and to increase the rate of gateroad construction, super longwall panels, 1000 feet wide and 12000 to 14000 feet long, are planned for Wolf Creek C
Jan 1, 1990
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Analysis of Panel Stability for Post-Mining Slurry Injection
By Tim Ross
Slurry injection into mined-out panels is an attractive alternative for disposal of coal preparation plant fines. however, in areas where surface subsidence cannot be tolerated, either by law or neces
Jan 1, 1998
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Geotechnical Mine Design Of The Foidel Creek Mine
By H. N. Maleki
The results of five years of geotechnical investigations are presented to develop productive and stable longwall layouts for the Foidel Creek Mine. The program was initiated during the pre-mining stag
Jan 1, 1988
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Rehabilitation of Underground Surge Bunker Following Massive Rib Wall Failure
By Rob Robinson
Following a massive rib wall failure along the reclaim belt of the large underground surge bunker at CONSOL?s Bailey Mine, a multifaceted, cleanup and rehabilitation effort was initiated to rapidly st
Jan 1, 2007
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Changes In Seismic Measurements With Blast Induced Fracturing: A Field Experiment
By Clifford J. Roblee
In this paper, various seismic indicators are evaluated for ability to discern fractures induced into a rock mass by blasting. This is accomplished by presenting results from in situ crosshole seismic
Jan 1, 1989
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Expanded Cement: New Solutions for Age-Old Problems
By John K. Wood
The development of an expanded cement product represents a major advance in the technology of roof control systems. Such a product is gaining recognition as a valuable tool in today's cost- consc
Jan 1, 1986
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Management of the Dynamic Phenomena of Rock Pressure in Underground Mines
By Vladimir I. Klishin
Complex method of ruling of rock pressure is considered in conditions of rapid roof subsidence. The purpose of this method is elaboration of emergency devices into hydraulic props. Also method of unlo
Jan 1, 1997
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Mine Panel Collapse - Two Case Studies
By Hanjie Chen
A mine panel collapse may occur when pillar sizes are too small or the surrounding rock strata (roof or floor) yields. After a small pillar fails, its loading is rapidly transferred to adjacent pillar
Jan 1, 1999
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Manifestation Of Mine Pressure And Its Relations To Overlying Strata Movements
By Z. C. Song
[THIS PAPER WAS TRANSLATED FROM CHINESE TO ENGLISH BY S. S. PENG, WEST VIRGINIA UNIVERSITY] Immediately after coal extraction, the pressure that causes the movement of the surrounding strata is c
Jan 1, 1982
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Effects Of Surface Topography On The Stability Of Coal Mine Openings
By Gregory M. Molinda
An investigation was conducted to determine the nature and frequency of coal mine roof failure beneath valleys. A mechanism for this failure, and suggestions for controlling this problem are presented
Jan 1, 1990
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Coping With High Lateral Stresses In An Underground Illinois Coal Mine (Inland Steel Coal Capany, Mine #2)
By C. Tom Blevins
The purpose of this paper is to discuss production and roof control problems associated with directional lateral stresses in an in situ stress field and the approach that Inland Steel Coal Company mad
Jan 1, 1982
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Determination of the Optimum Crown Pillar Thickness between Open Pit and Block Caving
By Kourosh Shahriar, Kazem Oraee, Ezzeddin Bakhtavar
"In this paper, a relationship between dependant parameters and the crown pillar thickness is first introduced. This relationship defines geotechnical problems caused by thin pillars and economic cons
Jan 1, 2010
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Determination Of Limitation Of Roof Layer Separation (LRLS) In Entry Roof
By Wenjun Ju
It's very important to determine the limitation of bed separation in entry roof in order to predict roofs stability and take some necessary precautions. Based on numerical modeling and monitoring
Jan 1, 2001
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Stepwise Support Technology For Extremely Soft Rock Roadway And Its Engineering Application
By Xinchuan Xia
Based on the stepwise strain features and the strength reduction law of the surrounding rock in extremely softrock roadway, this paper proposes a dynamic supporting principle. A new kind of stepwise r
Jan 1, 2000
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The Rheological Fracture Properties And Outburst Mechanism Of Coal Containing Gas (d683aa0b-ccc6-4082-b59a-667b798b544c)
The properties of coal or rock containing gas are very important both for studying coal and methane outburst mechanism and for controlling underground rock in mining. The theological fracture properti
Jan 1, 1992
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Prediction of Roof Fall Rate in Coal Mines Using Fuzzy Logic
By Ebrahim Ghasemi
Roof fall risk is a common problem in coal mines, and it is generally unpredictable due to variability in geological and mining parameters. In this study, a new fuzzy logic model was developed to pred
Jan 1, 2011
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Roof Instability of Longwall Face at Ikeshima Colliery
By Kikro Matsui
Longwall mining 1s more productive in comparison to other methods but requires particular conditions for its effective use This paper relates to longwall roof instability at Ikeshima Colliery In order
Jan 1, 1997