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Case Study of Conditions Observed During the Removal of a Highly Fractured Roof Beam in Bedded Halite
By Liane J. Terrill
A 9O) ft (275 meter) section of a highly fractured beam of halite was mined from the roof of a supported thirteen year old drift at the Waste Isolation Pilot Plant (WIPP). The operation was conducted
Jan 1, 1997
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A Comparison Of Support Reactions To Retreat Longwall Front Abutment For Two Different Gateroad Support Techniques
By Gary R. Corbett
The federally owned Cape Breton Development Corporation (CBDC) mines approximately 2.5-3.0 Mt of coal per annum from its Phalen Colliery. As part of an ongoing process to become more commercially viab
Jan 1, 1993
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Interaction Between Roof And Support On Longwall Faces With Particular Reference To Support Resistance
The objective of extensive underground experimentation on three longwall coal faces was to improve the stability of mechanised longwall faces through investigation of the relations between support res
Jan 1, 1984
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Roof Sounding Device - A Loose Rock Detector
By Richard C. Repsher
The U.S. Bureau of Mines has developed a method and device designed to detect lose rock material in underground mines. The technology is designed to be an aid to mine workers in detecting hazardous ro
Jan 1, 1990
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Letter Of Nomination
By Dr. Daniel W. H. Su
t is both an honor and privilege for me to nominate Dr. Daniel W. H. Su for the inaugural Syd S. Peng Ground Control in Mining Award. I can think of no better candidate than Daniel that is deserving
Jan 1, 2006
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A Practical Application of Photogrammetry to Performing Rib Characterization Measurements in an Underground Coal Mine Using a DSLR Camera
By Brent A. Slaker, Khaled M. Mohamed
"Understanding coal mine rib behavior is important for inferring pillar loading conditions as well as ensuring the safety of miners who are regularly exposed to ribs. Due to the variability in the geo
Jan 1, 2016
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Development, Trials, and Testing of a Two-Component, Rapid-Set Cement Grouting System
By Stephen C. Tadolini, Robert Hawker, Peter Mills, Colin Grubb, Tom Meikle
"In unfavorable strata conditions, it is often necessary to install additional long tendon support as part of a primary support cycle. Although these support systems provide the required additional st
Jan 1, 2017
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Design Considerations for Tensioned Bolts
By Yunqing Zhang
The 3-D numerical modeling using ABAQUS is performed to analyze the mechanisms of the tensioned bolts by taking into considerations excavation sequence, pre-tension, bedding planes and in-situ horizon
Jan 1, 2002
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Think Like a Rock
By Tom Barczak
Early in my career, while giving a presentation on shield design for longwall mining at one of the International Conferences on Ground Control in Mining, the late Jim Scott told me that I was finally
Jan 1, 2011
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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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Quantification of Ventilation Enhancement Using the Eye Can Roof Support
By Mark F. Sindelar, Yi Luo, Hua Jiang, Michael T. Shook
"Convergence of roof and floor in underground mine openings is a common occurrence. This convergence not only adversely affects the ability of workers, equipment and supplies to travel through the min
Jan 1, 2016
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Design of Roof Bolt Based Breaker Line Support in a Mechanised Depillaring Panel
By Sahendra Ram, Arnn Kr Singh, Dheeraj Kumar, Rajendra Singh
"Inherent existence of different rooms (openings) along the extraction line in a depillaring panel provides an easy path for the goaf to encroach the working area. Each of these openings in a mechaniz
Jan 1, 2016
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An Application Of Tree Classification Method In Analysis Of Longwall Shield Stability
By Yong-Ming Jiang
Longwall mining systems are extremely complex and expensive and require great caution for reliable and efficient operation. In many cases, ground control problems are the primary concern in longwall m
Jan 1, 1993
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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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Some Structural Aspects Of Designing The Shield Supports
By S. S. Peng
This paper presents a convenient way for the preliminary design of the shield supports. The locus equations which are applicable for all kids of shield supports are derived. These equations facilitate
Jan 1, 1982
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Assessment of the Dynamic Loads Effect on Underground Mines Supports
By Kazem Oraee-Mirzamani
Blasting operations generate seismic effects in underground mines. These effects apply additional dynamic loads on the support system, which should bear both static and dynamic loads. Static loads are
Jan 1, 2011
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The Massive Collapse Of Coal Pillars - Case Histories From The United States
By Frank E. Chase
A massive pillar collapse occurs when undersized pillars fail and rapidly shed their load to adjacent pillars which in turn fail. This chain reaction-like failure may involve hundreds, even thousands,
Jan 1, 1994
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Field Testing of a Real Time Roof Mapping Drilling Display System in a Limestone Mine
By Craig Collins
The objective was to develop a Real Time Drilling Display System for Rotary Roof Bolting using Analyzing Software to display mapped holes as they are being drilled in real time. The Analyzing Softw
Jan 1, 2004
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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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Load And Deflection Response Of Ventilation Stoppings To Longwall Abutment Loading - A Case Study (49571726-6a2d-49b8-8ef0-957c4421195c)
By David C. Oyler
Few studies have specifically measured and documented the large-scale loading behavior and durability of ventilation stoppings to mining induced movements, particularly from longwalls. Ventilation sto
Jan 1, 2001