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Ground Control Practice at Leeville Underground Mine
By Changshou Sun
The geotechnical properties of mining zones at Leeville Underground mine (or simply called Leeville mine through this paper) are different from one zone to another. The typical ground condition is poo
Jan 1, 2013
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Leached Salt Cavern Design Using a Fracture Criterion for Rock Salt (81ddea75-bb8e-4c9d-8bc7-d9299dc4873e)
By Dale S. Preece
In 1975 Congress passed the Energy Conservation Act to establish a U. S. Strategic Petroleum Reserve (SPR) with a capacity of 750 million barrels of crude oil. The most economic storage medium was det
Jan 1, 1984
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3D FEM Simulation For Fully Grouted Bolts
By Khaled Morsy
Most of the available numerical codes simulating the reinforcing effect of fully grouted bolt are accomplished by a series of bar elements which are connected along their length to the host rock by sh
Jan 1, 2004
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Highwall Mining of Thick, Steeply Dipping Coal: A Case Study in Geotechnical Design and Recovery Optimization
By David P. Conover, Jake Bain, Christopher M. Ross
"Highwall mining of thick (up to 100 ft) steeply dipping (20° or more) coal seams provides many challenges, both geotechnically and operationally because seam dips near or in excess of highwall mining
Jan 1, 2017
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Case Study of Roof Behaviour and Conditions for Longwall Face Recoveries at Beltana No. 1 Mine, Australia
By David Hill
Over the last decade, Beltana No.1 Mine has generally been Australia?s most productive longwall operation, with a ROM output of 7.2 Mt in YEJ2007. Characteristically favorable roof conditions and low
Jan 1, 2011
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Geotechnical Considerations for Concurrent Pillar Recovery in Close Distance Multiple Seams
By Peter Zhang
"Room-and-pillar mining with pillar recovery has historically been associated with more than 25% of all ground-fall fatalities in the underground coal mines of the United States. The risk of ground fa
Jan 1, 2017
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Recent Innovations for Slope Development
By Tim Burgess
Patton Mining, LLC and J.H. Fletcher Company recently collaborated and mechanized the sometimes hazardous, and always labor intensive, process of installing standing steel supports during the construc
Jan 1, 2011
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Volumetric Measurement of Rock Movement Using Photogrammetry
By Stephen R. Iverson, Jeffrey C. Johnson, Donovan J. Benton, Michael J. Raffaldi, Lewis A. Martin
"The NIOSH ground control safety research program at Spokane, Washington, is exploring applications of photogrammetry to rock mass and support monitoring. This paper describes two ways photogrammetric
Jan 1, 2015
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An Alternative for More Productive Rib Bolting in Underground Mining Applications
By Joe E. Bryan, John P. McDonnell
"Underground mine rib stability is an ongoing safety issue in all mining applications. Rib-related accidents present at least as many problems as roof-related ground control. Underground coal mine rib
Jan 1, 2015
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Techniques To Increase Yield Pillar Residual Strength
By Dennis R. Dolinar
The U.S. Bureau of Mines has modeled yield pillars to determine the effects of reinforcement techniques on pillar performance. Model pillars with width-to-height (w/h) ratios ranging from one to four
Jan 1, 1993
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"Void Fill Techniques for Stabilizing Roof Conditions during LongwallShield Recovery"
By Rusty Mchenry, Craig Dickerson, Robin L. Oldham
"It has been proven that longwall faces can be moved safely and efficiently. However, abutment pressures and poor ground control conditions can halt operations and be hazardous to coal miners. Recentl
Jan 1, 2015
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On Research Needs in Coal Mine Ground Control
By Syd Peng
"As the International Conference on Ground Control in Mining (ICGCM) enters its 35th year in 2015, it is time to look back and identify the areas that need to be emphasized and to look forward to see
Jan 1, 2015
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Status Of Longwall Research In CSIRO
By Michael Kelly
Current research in longwall mining in CSIRO Exploration & Mining is focused within five major projects and several minor projects. The major projects are: 1 3D Aspects of Longwall Geomechanics. Th
Jan 1, 2001
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The New Two-Dimension LaModel Program
By Olayemi Akinkugbe
As coal production in the United States continues to increase, the availability of unexploited or virgin fields continue to diminish. As a result, mine operators are forced to mine in unfavorable or m
Jan 1, 2004
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Analysis And Field Testing Of Presupport Application In Coal Strata
By J. D. Dizon
Conventional strata control methods (i.e. roof bolts. cable trusses) are not always effective for ground control of very weak coal strata. An alternative method, termed presupport. is being investigat
Jan 1, 1990
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Surface Flooding-Considerations For Mining Facilities Site Selection
By Daniel S. Mazzei
This paper will be a general discussion of surface flooding considerations as they affect mining facilities site selection, based primarily on experience with several such problems with which MSHA&apo
Jan 1, 1982
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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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Performance and Safety Considerations of Hydraulic Support Systems (eb62774d-dbca-420f-b228-950711bafbce)
By Thomas Barczak
Hydraulic cylinders are used in several roof support systems, such as longwall shields and mobile roof supports, to provide critical ground control Many state-of-the-art hydraulic support system opera
Jan 1, 1998
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Overcoring Techniques to Assess in Situ Corrosion of Galvanised Friction Bolts
The effects of corrosion upon the load bearing capacity and ultimate tensile strength of galvanised friction bolts were determined. Corrosion rates were measured by overcoring of the reinforcement ele
Jan 1, 2005
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In Situ Stress For Underground Excavation Design In A Naturally Fractured Rock Mass
By Andrew J. Hyett
The ISRM commission on testing methods has recently presented Suggested Methods for rock stress determination (Kim & Franklin, 1987). This proposes that even if the magnitude of in situ stress is not
Jan 1, 1989