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Design Of Multi-Level Thick Seam Extractions Under Major Aquifers And Considering Spontaneous Combustion Risk
By D. J. Reddish
An understanding of the mechanisms that cause large seismic events in a deep mine provides a foundation for designing effective measures to reduce the incidence of these events, as well as reduce the
Jan 1, 1996
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Requirements and Performance of Pumpable Cribs in Longwall Tailgate Entries and Bleeders
By Peter Zhang
Pumpable cribs are being increasingly used in longwall tailgate entries and bleeders for roof support under abutment pressure. Their high peak capacity and confinement-controlled yield characteristics
Jan 1, 2012
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Airbag Support for Ground Control in Thin Seam Coal Mining
By Fan Shaogang
In this paper, the airbags' structure and technical characteristics and its applications in China are described. Based on the practice of the airbags in mining thin seams, the effects on ground c
Jan 1, 1997
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Understanding the hydraulic pressure cell
By Keith A. Heasley
Numerous different instruments and techniques have been developed for the purpose of measuring rock stress and stress changes around excavations. The interpretation of the output from many of these in
Jan 1, 1989
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Analysis of Small-Scale Thrust Faults and Their Effect on Coal Mining in Southern West Virginia
By Thomas Z. Jones
Deep mining within the Sewell Coal member of the New River Formation in southern West Virginia has exposed several small-scale thrust faults and related features. The faults were en- countered in West
Jan 1, 1986
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High Horizontal Movements In Longwall Gate Roads Controlled By Cable Support Systems
By Dennis R. Dolinar
Controlling coal mine roofs subjected to high-horizontal stress conditions has always been difficult and uncertain. Traditional supports such as wooden cribs and posts, concrete donut cribs, and stand
Jan 1, 1996
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A Case Study of Longwall Roof-Supports Interaction
By Y. H. Wang
During the last two decades many research projects were conducted to study the load requirements for the powered supported longwall faces (1-6). Significant results had been achieved by these research
Jan 1, 1986
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New Type of Load Cell for Monitoring of Roof Bolt Tension
By K. Unkug
It is commonly accepted that the tension of roof bolts can be used as a measure of the effectiveness of roof support performance in coal bearing strata. The conceptual base for the assumption orig
Jan 1, 1986
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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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Application of Electrohydrodynamic Method and High-Pressure Water Jets as Non-Blasting Alternative of Rock Breaking and Splitting in Open Pits
By Krzysztof Kotwica
The steady demand for rock materials leads not only to on increase in mining but to the need for decreasing the loss of material in the process of exploitation as well. It brings about an increase in
Jan 1, 2006
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Aspect Ratio and Other Parameters That Affect the Performance of Burrell Can Roof Supports
By David F. Gearhart
The Burrell Can1 is a thin, steel, tubular shell filled with aerated concrete that is used as a roof support in coal mines. The Can height is always shorter than the mining entry, so it is capped with
Jan 1, 2012
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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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Failure mechanisms in ultra-close seam mining
By Yingxin Zhou
Virtually every coal seam in Appalachia will at some time be subject to multi-seam interaction (Wu et al, 1987). Many such problems result from seams which lie in close proximity or have split and lie
Jan 1, 1989
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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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Destressing Practice In Rockburst-Prone Ground
By J. Willan
This paper addresses the problem of designing a destress blasting procedure to reduce the incidence of rockbursting in hard rock mines. A review is made of the developed theory and practice of destres
Jan 1, 1984
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Load Determination For Long Cable Bolt Support Using Computer Aided Bolt Load Estimation (CABLE) Program
In this paper a numerical formulation is presented for determination of the axial load along a cable bolt for a prescribed distribution of rock mass displacement. Results using the program CABLE indic
Jan 1, 1996
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Practical Strata Management, Beltana No. 1 Mine, Australia
By Shane McDonald
Australia produces approximately 84 million tonnes of coal per annum from 30 longwalls in New South Wales and Queensland, operating at an average depth of around 300m. Industry trends and expectations
Jan 1, 2008
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Innovation in Rock Mechanics: Iced Tailings As Structural Backfill for the Citronen Mine, Ironbark Zinc Ltd., Greenland
By Andrew P. Schissler
The Citronen Zinc-Lead Project is one of the world?s largest undeveloped zinc-lead resources, containing more than 13 billion pounds of zinc and lead metal. The project is located in northern Greenlan
Jan 1, 2012
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Sub-Surface Cracks Due To Disc Cutter Spacing For Improved Rock Breakage And Ground Control (9409c703-a463-4470-b9b9-4f86b64581d4)
By N. I. Aziz
The importance of using disc cutters for rock excavation is reflected by their wide application in hard rock cutting machines such as tunnel boring machines and raise borers. The forces involved in th
Jan 1, 1992
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Improving Design Methodology For Innovative Rock Mechanics Design
By Dwayne C. Kicker
This paper introduces the concept of design theory and methodology as applied to rock mechanics for more innovative and efficient design. This is a "frontier" research area in rock mechanics because a
Jan 1, 1989