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Updating the NlOSH Support Technology Optimization Program (STOP) With New Support Technologies and Additional Design Features
By Thomas M. Barczak
The initial Support Technology Optimization Program (STOP), Version 1.0, was released at the 19th Gmund Control Conference. This original program has since been updated to Version 2.3 which was releas
Jan 1, 2001
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Subsidence Monitoring Results, Thick Seam Longwall Mining In Wyoming
By Collin L. Stewart
A summary of the results of a limited subsidence monitoring program at Cyprus Amax Coal Company's Shoshone Mine No. 1 in the Hanna Basin of south central Wyoming is presented. The monitoring prog
Jan 1, 1995
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Strategies for the Application of Rockbolting Technology to Longwall Gateroads in Chinese Coal Mines
By Zuoliang Xiu
Experience indicates that rockbolting is the most efficient and cost effective means of supporting gateroads of retreating longwalls. However, gateroads supported solely by rockboltiug currently accou
Jan 1, 1997
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Proposed Criteria for Assessing Subsidence Damage to Surface Structures
By Swapan Bhattacharya
Section 516 of Public Law (PL) 95-87, commonly known as the Surface Mining Control and Reclamation Act of 1977 (SMCRA), requires that underground coal mine operators must 'adopt measures consiste
Jan 1, 1984
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Comparison Of Multiple And Single Entry Roadways For Highly Stressed Longwalls
By Klaus Opolony
The world's most popular method of longwall mining requires multiple entry systems for the panels. In contrast to this mine layout the roadways in German coal mining are used for advanced mining
Jan 1, 2003
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Application of Highwall Mining System at Surface Coal Mine in Thailand
By Takashi Sasaoka, Pinyo Meechumna, Hiroshi Takamoto, Pipat Laowattanabandit, Akihiro Hamanaka, Kikuo Matsui, Hideki Shimada
"The EGAT Mae Moh coal mine is an open-cut coal mine in Thailand that produces about 16 million tons of lignite annually to generate 2,400 mw of electricity. The surface mine pit covers is 4 by 7 km (
Jan 1, 2010
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The Failure Mechanism and Control Technology of Coal Wall of a Large Mining Height Panel
By Dezhong Kong, Jaichen Wang, Shengli Yang
"The stability control of longwall coal face is the key technology of large-cutting-height mining method. Therefore, a systematic study of the factors that affect coal face stability and its control t
Jan 1, 2015
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Re-Use of Rectangular Bolted Roadways in a Cover Depth > 1000 M
By Klaus Opolony
The German coal industry operates a multi-seam extraction system, with average working depths currently around 1,000 meters. The gate roads serving the longwalls are often used for a second time - a p
Jan 1, 2002
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The Integration Of Geology And Engineering In Ground Control And Mine Planning For A Multi-Level Underground Limestone Quarry
By D. Newman
An underground limestone quarry, developed in the 1940's, transitioned from a surface quarry to an underground room-and-pillar operation. The quarry expanded to a second underground level when th
Jan 1, 2001
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A Study On The High-Water Solidifying Materials For Gob-Along Roadside Instead Of Coal Pillars
By Yunxin Qiu
A new technology has been introduced - the use of the High-Water Solidifying Material for providing pumped roadside supports to maintain a roadway for re-use in longwall retreating. As a gob edge supp
Jan 1, 1992
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Renewed Interest In Prop Supports As A Replacement For Wood Cribs
By Thomas M. Barczak
Wood cribs have been the dominant form of supplemental support in coal mining for many years. Recently, there has been a renewed interest in prop supports as a replacement for wood cribbing due to the
Jan 1, 1995
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A Case Study Of A Deformation Mechanism Around A Two-Entry Gate-Road System Involving Probable Time-Dependent Behavior
By M. K. Larson
The U.S. Bureau of Mines and Cyprus Shoshone Coal Corp. conducted a study of deformation mechanisms around a longwall gate-road system in an underground coal mine. Of particular interest was roof defo
Jan 1, 1995
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Effect of Geological and Mining Factors on Roof Stability of a Room and Pillar Mine in US
By Taghi Sherizadeh, Pinnaduwa H. S. W. Kulatilake
"This paper examines the effect of different geological and mining factors on roof stability in underground coal mines by combining the field observations, laboratory testing, and numerical modeling.
Jan 1, 2015
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Probabilistic Stability Analysis Of Embankments And Slopes (1006fe25-ccb9-48a0-86b2-57e4779408ba)
By Rossen A. Halatchev
This study introduces a new probabilistic approach to seismic stability analysis of embankments and slopes. The approach is based on Sarma's solution, which is modified through presentation of th
Jan 1, 1992
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Floor Heave Control Outby the Seal Line in No. 11 West Kentucky Seam
By Joel Bradley, Kot Unrug, Kyle Perry, Mark Klimek
"A West Kentucky mine operation in No. 11 seam, encountered floor heave, due to the localized increase of the thickness in the fireclay mine floor. Floor heave has overridden seals installed in two mi
Jan 1, 2015
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An Alternative To A Manual Torque Check On Roof Bolts
By Joseph A. Cybulski
In response to the mining of reserves with increasingly adverse round conditions and the roof support recommendations of current rock mechanics theories, roof support systems have continued to improve
Jan 1, 1990
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Validation of Entry Stability Factors Determined By the Strength Reduction Method Against Empirical Approaches
By Gabriel S. Esterhuizen
The design of support for underground excavations is a complex process in which the interaction between supports and the rock mass must be evaluated. The strength reduction method (SRM) is useful beca
Jan 1, 2013
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Roof Behavior In South African Coal Room And Pillar Panels
By Bruce W. Jack
An extensive underground roof-monitoring program was conducted in order to determine the roof strata behavior under various conditions. In total 29 sites at 5 different collieries were monitored using
Jan 1, 2000
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Development Of A Statistical Technique For Assessing Sandstone Escarpment Stability
By Hamid Maleki
During the last decade, a significant amount of research has been conducted by Energy West Mining Company, government agencies, academia, and consulting companies to develop predictive tools for asses
Jan 1, 2000
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Investigation Into Abnormal Surface Subsidence Above a Longwall Panel in the Southern Coalfield, Australia
By Winton J. Gale
The subsidence over a longwall panel at Tahmoor Mine in the Southern Coalfield of NSW, Australia, was found to be approximately twice the size it had been in previous measurements. An investigation in
Jan 1, 2011