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Analysis of Coal Pillar Stability (ACPS): A New Generation of Pillar Design Software
By Zach Agioutantis, Christopher Mark
"Thirty years ago, the Analysis of Longwall Pillar Stability (ALPS) inaugurated a new era in coal pillar design. ALPS was the first empirical pillar design technique to consider the abutment loads tha
Jan 1, 2018
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Five Stress Factors Conducive To Bumps In Utah, USA, Coal Mines
By Joe F. T. Agapito
High stresses and adverse geology in deep coal mines in the state of Utah, USA, have caused numerous bumps. The larger bumps have been associated with seismic events with Richter magnitudes of 3.6 and
Jan 1, 2000
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Utilization of the Hilti OneStep Rock Anchor at Twentymile Coal Company to Reduce the Overall Amount of Time for Face Stabilization During Longwall Recovery
By Bill Stormes
This paper will discuss implementation of the Hilti OneStep rock anchor technology to improve face bolting operations during the May 2008 longwall move; increase rock anchor installation capacity; and
Jan 1, 2008
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Coal-Mining-Induced Seismicity in Utah?Improving Spatial Resolution Using Double-Difference Relocations
By Kristineq Pankow
The August 2007 Crandall Canyon mine disaster raised national awareness of mining-induced seismicity (MIS) in Utah as well as general interest in how seismic monitoring might improve mine safety in th
Jan 1, 2008
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Utilization of the OSI Underground System's Tandem Anchor to Improve the Weak Roof's Stability of Underground Openings
By Tom Blevins, Roland Walker, Jinsheng Chen
"The Dywidag-Systems International DSI Tandem Anchor bolt, with an improved expansion shell-washer design, can substantially reduce potential entry roof falls caused by twisted or deformed expansion s
Jan 1, 2010
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A Comparison Between ARMPS and the New ARMPS?LAM Programs
By Peng Zhang
In previous research, the laminated overburden model from the LaModel program was effectively integrated with Analysis of Retreat Mining Pillar Stability (ARMPS) through ARMPS-like input to create a l
Jan 1, 2014
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In-Situ Testing Of Roofex Yielding Rock Bolts In Coal Ribs (d7c8f4cb-6d76-4845-93df-11dd74a1d904)
By Sean Harvey
One of the manifestations of the dynamically induced failures in deep coal mines is the violent ejection of coal from the ribs. A possible protection against such failures is the use of a specificall
Jan 1, 2009
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An Examination of the Loyalhanna Limestone's Structural Features and Their Impact on Mining and Ground Control Practices
By Tony Iannacchione
A close look at the Loyalhanna Limestone of southwestern Pennsylvania reveals a complex structural environment. Most exposures of the Loyalhanna occur along Chestnut Ridge and Laurel Hill within the A
Jan 1, 2002
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A First Step in Developing Standing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support
By Thomas Barczak
Roof support systems are designed for roof control to prevent unplanned falls. It sounds logical and has been the conventional thinking in support design since supports were first installed. In orde
Jan 1, 2008
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Investigation of Rock Mass Stability around Tunnels in an Underground Mine in USA by 3-D numerical modeling
By L. A. Sandbak, Yan Xing
"The purpose of this study is to evaluate the rock mass stability around the tunnels by three-dimensional (3-D) numerical modeling. Complex geological and tunnel features have been included in the mod
Jan 1, 2016
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Numerical Analysis of Some Geotechnical Factors Influencing the Application of Longwall Top Coal Caving
By Dao Hong Quang
This paper describes the numerical analysis of some geotechnical factors influencing the application of Longwall Top Coal Caving (LTCC) method. The study was aimed at comparing the differences in stre
Jan 1, 2008
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Geomechanical and Weathering Properties of Weak Roof Shales in Coal Mines
By Hakan Gurgenli
Many coal seams have weak shale immediate roofs that cause ground control problems. Therefore, it is important to know the properties of these shales so that preventive measures can be developed in a
Jan 1, 2006
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Strata Movement of Protective Seam Mining with Large Interburden ?? A Case Study
By Changsheng Song
With increasing depth of coal mining in China, the number of coal and gas outbursts has been increasing for years. By means of destressing the protective seam, the gas in the protected seam is drained
Jan 1, 2008
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Numerical Simulation of Reinforced Concrete Mine Seal Subjected to Explosion Loading
By Khaled Morsy
The tragic incidents at Sago and Darby coal mines in 2006 pointed out the need for stronger seals to resist the blast effects of violent gob explosions. Mine Safety and Health Administration (MSHA) ha
Jan 1, 2008
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Alleviation of Rock Bursts by Identifying Burst-Prone Mine Workings
By S. Paul Singh
Rock burst is one of the most serious mining hazards, adversely affecting the safety, economy and productivity of mines. It is a sudden manifestation of the release of strain energy stored in the rock
Jan 1, 2008
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Coal and Gas Outburst in a Coal Mine Shaft Development: A Case Study
By Mingju Liu
China has been suffering from coal and gas outbursts since 1950s. Nowadays, the situation has become worse than ever with the need to mine deeper coal deposits at higher production rates in a more com
Jan 1, 2007
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Multiple Seam Interactions of Relatively Shallow, High Seam Shortwalls in South Africa
By John Latilla
Exxaro Mining?s Matla Coal situated in Mpumalanga, South Africa operates two shortwall faces on the No 4 and No 2 seam while the No 5 seam has also been longwalled in the past. Severe strata loading e
Jan 1, 2007
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Effect of Faults on the Movement of Roof Strata in Gateroads
By Panfeng Gou
In order to solve the problems of supporting the roof of the gateroads affected by a fault, the movement characteristics of roof strata must be fully understood. In this paper, a plane stress physical
Jan 1, 2006
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Evaluation of Support and Ground Response as Longwall Face Advances into and Widens Pre-Driven Recovery Room (94eb68ca-11f6-41ed-b8a6-cb9b52889278)
By Thomas Barczak
A cooperative study was conducted with Emerald Coal Resources, L.P., an affiliate of Foundation Coal Corporation, and the National Institute for Occupational Safety and Health (NIOSH) to evaluate the
Jan 1, 2007
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High-Precision Dynamic Subsidence Prediction Model Aided by Field Measured Data
By Yuanfei Chen, Jianfeng Zha
"China is the largest producer and consumer of coal in the world. The mining-induced surface subsidence has bad influences on the surface and structures above the surface. In order to minimize disaste
Jan 1, 2017