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High Capacity Tensioned Cable Bolts For Tailgate Support
By Stephen C. Tadolini
A joint research program was designed and conducted at Lodestar Energy?s Baker Mine to investigate the performance of a high-capacity tensioned cable supported gateroad. The secondary system consisted
Jan 1, 2000
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Non-confirmation Mathematics for Wall Rock Classification for Mine Support
By Guangyi Sun
Wall rock classification method for coal mine support is the main factor affecting mine support. It is greatly affected by the combined effect of randomness, fuzziness and human being's incomplet
Jan 1, 2005
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Detailed Stress Analysis of Longwall Panels
By Khaled Morsy
In the past two decades, high horizontal stress has been attributed to many ground control failures. Most believe that entries parallel to the high horizontal stress is most stable and least stable wh
Jan 1, 2006
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Supporting Method of the Bolted Strata in Large Deformation Roadways
By Shuangsuo Yang
Based on field observations and physical modeling of simulated materials, the dynamic equilibrium principle on the whole interaction process between the surrounding rocks and support of large deformat
Jan 1, 2005
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Geotechnical Considerations for Longwall Top Coal Caving at Austar Coal Mine
By Adrian L. Moodie
Austar Coal Mine (formerly Southlands and Ellalong Collieries) has had a long association with difficult strata control conditions associated with mining depth and a highly jointed/cleated coal seam.
Jan 1, 2011
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Outcomes of the Landmark Longwall Automation Project with Reference to Ground Control Issues
By Michael Kelly
Inertial navigation technology has, for the first time, allowed the position of a longwall shearer to be mapped in three dimensions. Following the success of the technology in highwall mining and succ
Jan 1, 2005
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Detection of Abandoned Mines and Air Passages/Burning Centers of Mine Fires by Combined Electromagnetic Method
By Shu Yan
The high resolution resistivity method (HRRM) is developed specifically for detecting underground cavities and tunnels. HRRM has a special feature in that it can recognize and cancel static shift, whi
Jan 1, 2005
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Rib Support Innovation At Daw Mill Colliery (a22a0861-1502-4d3d-a2cd-8a6ba0c13271)
By Jon Bowler
Daw Mill Colliery, UK Coal, near Coventry in England, mines the Warwickshire Thick Seam at 800 m/2500 ft depth using longwall retreat with gateroads supported by rockbolts. Over the last eight years
Jan 1, 2009
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Roof Screening for Underground Coal Mines: Recent Developments (45f180e8-0601-41d7-bc8b-2e9de87bd46d)
By Craig Compton
Falls of small pieces of rock from between roof bolts continue to cause fatalities and to injure hundreds of coal miners each year. Roof screen is the most effective way to prevent these incidents,
Jan 1, 2007
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Comparison of the Performance of Active and Passive Roof Bolts in An Illinois Basin Coal Mine
By Anil K. Ray
This paper discusses in situ studies conducted at an Illinois Basin room-and-pillar coal mine to evaluate the performances of three different types of bolts under similar geologic conditions. The bolt
Jan 1, 2012
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Crinum Mine 15 Longwalls in Weak Roof What Did We Learn about Supporting the Ground?
By Dan Payne
The Crinum mine has recently completed workings in the southern area of the mine. Over the 10 years of longwall production 40 million tonnes have been extracted and the mine has experienced over 40 lo
Jan 1, 2008
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A Resin Quality Testing Procedure for Collieries
By D. Minney
The quality of resin used in South African collieries is currently controlled according to South African Bureau of Standards, "SABS-1534:2002". It has however been found that resin which passed the SA
Jan 1, 2005
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The Influence of the First Layer Thickness of Immediate Roof on its Stability
By Lixun Kang
Bedded structure is the characteristics of coal measures strata. Bedding planes, coal streaks and soft rock bands existing in roof strata destroyed its continuity in the direction perpendicular to the
Jan 1, 2005
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Mitigating Longwall Subsidence Effects on a Large Industrial Building
By Yi Luo
The efforts to mitigate longwall subsidence influences on various residential and farming structures by many coal mining companies have been successful in the recent years (Luo, et al, 2003). The succ
Jan 1, 2005
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Mitigating the Effects of High Horizontal Stress on Ground Control in An Underground Stone Mine: A Case History
By John Ellenberger
The nature of a stone deposit is rarely defined through exploration and engineering design, but more through the actual experience encountered as the mine develops; hence, issues with ground control a
Jan 1, 2012
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Multiple Seam Mining Interactions: Case Histories from the Harris No. 1 Mine (b50cab1b-ba36-4377-a652-1d452c62f433)
By Frank E. Chase
The Harris No. 1 Mine, located in Boone County, WV, has been longwalling the Eagle Coalbed for over 30 years. Harris has experienced numerous interactions associated with the extensive room-and-pillar
Jan 1, 2005
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Footwall Stability and Final Pit Design in the PT. Adaro Coal Mine, Indonesia
By Takashi Sasaoka
The PT. Adaro Coal Mine targeted in this research is located in South Kalimantan, Indonesia. The coal production of this mine is increasing year, with about 35 M tons of coal produced in 2006. Th
Jan 1, 2008
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A Retrospective Assessment of Longwall Roof Support with a Focus on Challenging Accepted Roof Support Concepts and Design Premises
By Thomas M. Barczak
The era of the shield-supported longwall face began in the United States a little over 25 years ago. The most fundamental development of the shield in the past 25 years has been an increase in size a
Jan 1, 2006
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J?Crete: An Engineered Cementitious Composite Rock Coating
By Alan A. Campoli
The mining industry has long been searching for an effective structural application that prevents weathering and falls of loose rock, debris, and sediment. J-Crete is a fiber-reinforced, engineered, c
Jan 1, 2012
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Time Dependent Roof Deterioration At A Central Ohio Coal Mine (b0f3bbeb-91e8-4a62-8116-5f9e444a047e)
By Ted Klemetti
Roof deterioration in weak moisture-sensitive rock leads to roof falls in coal mines. An observation site was set up in intake air at an underground coal mine in central Ohio to evaluate the time-dep
Jan 1, 2009