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Analytical Solutions of Hard Roof’s Bending Moment, Deflection, and Energy under Front Abutment Pressure before Periodic Weighting
By Yun Zhang, Haijun Jiang, Shenggen Cao, Chen Wang
The distribution of front abutment pressure is closely related to the force, deformation and energy distribution of hard roof before periodic weighting. So it is necessary to carry out research on the
Jan 1, 2015
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Upgraded Comprehensive and Integrated Subsidence Prediction Model CISPM - W
By Yi Luo
In dealing with various subsidence cases, accurate predictions of mining induced subsidence are the basis for correct assessment of subsidence influences and subsequent mitigation efforts. There is a
Jan 1, 2008
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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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Geomechanical Support Of Adaptive Mining Technology
By I. V. Baklashov
Geomechanical conditions of mining operation are determined by varying in time and space mechanical properties and initial state of the rock mass, by geological and technological factors. We define ad
Jan 1, 1996
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Massive Pillar Collapse: a Room?and?Pillar Marble Mine Case Study
By Sandin E. Phillipson
The Mine Safety and Health Administration?s Roof Control Division responded to a massive ground failure at an underground marble mine in northern Georgia. The ground failure occurred in a benched area
Jan 1, 2012
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Yield Pillar Application Under Strong Roof And Strong Floor Condition - A Case Study
By P. Tsang
The mechanisms and functions of yield pillar are analyzed by employing finite element method that takes time dependent and plastic failure of rock into consideration. The design criteria for different
Jan 1, 1989
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Complex Seismic Trace Attributes In Coal Exploration
By Lawrence M. Gochioco
The interpretation of coal seismic data requires a certain precision and accuracy to make the results more reliable. The signature of the seismic wavelet provides a host of valuable geologic informati
Jan 1, 1989
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Time-Dependent Behavior Of Rocks: Laboratory Tests On Hollow Cylinder
By Gilles Rousset
This paper presents laboratory experiments conducted on hollow cylinders samples. The advantage of such a geometry is to approach in situ conditions around cylindrical openings (lined galleries, boreh
Jan 1, 1989
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Determination Of Horizontal Stress Direction By Underground Mine Mapping (2f4eaf66-10ce-4f4d-9f7a-64c6c21e6400)
By S. E. Phillipson
Underground mine mapping is a critical component of understanding the controls on ground instability. Many relatively localized examples of ground failure are associated with geologic features, such
Jan 1, 2009
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Mine Stability Mapping
By Collin L. Stewart
The high cost and limited flexibility of modern longwall systems has resulted in the need for mine engineers and geologists to predict possible adverse mining areas ahead of mining and to then design
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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Application Of Short-Term Time-Dependent Plate Loading Tests For Estimation Of In-Situ Elastic And Viscous Parameters Of Weak Floor Strata
By Gang Chen
This paper explores the possibility of using short-term time-dependent plate loading tests to estimate the elastic and viscoelastic parameters of the weak floor strata typically associated with coal s
Jan 1, 1990
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Strata Management with Ground Behavior Assessment for Mass Exploitation of Coal Deposits: A Case Study of Continuous Miner
By Sanjay Kumar Singh
The mechanics of load transfer in bord-and-pillar mining is not well understood despite the evolution of the art of pillar extraction over the last 20 years via trial and error (empirical) or Rock Mas
Jan 1, 2012
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Roof Pressure Monitoring Using The Integrated Longwalt Automation System By WESTFALIA
By Ulrich Paschedag
The WESTFALIA group of companies developer and manufactures underground mining machinery for complete high-performance longwalls. WESTFALIA uses a state of the art electrohydraulic system as the most
Jan 1, 1994
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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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Experimental Study Of Line Electrode Method To Detect Underground Cavities
By F. Ziaie
Line electrical resistivity method using physically infinite distance between current line electrodes is proposed to determine the location of mine workings. In this method at least three line electro
Jan 1, 1989
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Application Of A Simplified Three-Dimensional Roof-Pillar-Floor Interaction Analysis Model For Subsidence Prediction
By Witold M. Pytel
A simplified, three-dimensional, time-dependent, mechanistic model of the overburden-coal seam-floor interaction has been developed and validated at two Illinois coal mines. The model based on the thi
Jan 1, 1992
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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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Jenmmar Compression Roof Control System
By John C. Stankus
To improve mine roof bolt performance, Jennmar Corporation commenced the design and development of a new roof control sys- tem. This new system designated "Insta'l Compression", not only improves
Jan 1, 1990
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Effect Of Water On Stability Of Mine Roadways
The basic objectives of mine roadways are to provide sufficient cross sections in order to meet the needs of accommodation of equipment, transport, personnel travel and ventilation. However, many road
Jan 1, 1996