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Dynamic Failure in Coal Seams: Implications of Coal Composition for Bump Susceptibility
By Arthur Miller, Andrew Weakley, Heather E. Lawson
"IntroductionDynamic failure events in an underground coal mine, or “bumps,” are defined as “the sudden, violent bursts of coal from a pillar or pillars or a block of coal, resulting in a section, the
Jan 1, 2015
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The Impact Factors of Overburden Movement in Longwall Mining of Shallow Coal Seams
By Yang Li
For the study of overburden movement in longwall mining of shallow coal seams, most scholars merely consider the thickness of bedrock and top soils. In this paper, the overburden movement in longwall
Jan 1, 2014
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Imaging Ahead Of Mining With Radio Imaging Method (RIM-IV) Instrumentation And Three-Dimensional Tomography Software
By Larry Stolarczyk
A clear vision of the future coal mining industry was developed into a hierarchy of technology needs by the National Mining Association (NMA) and the Chief Executive Officers of the mining industry. A
Jan 1, 2003
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Roof Screening: Best Practices and Roof Bolting Machines (e5909744-6953-4a41-b02f-21226966b63f)
By Susan Robertson
Many injuries are caused each year by rock falls in coal mines. Most of these injuries are not caused by major roof collapses, but from falls of smaller rocks from the immediate top or roof skin. Vari
Jan 1, 2002
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Roof Geotechnical Properties for Roof Control Purposes in Illinois Coal Field
By Abdolreza (Reza) Osouli
Determining the roof stability condition of underground coal mines in the Illinois Basin is sometimes very challenging. The roof stability of Illinois mines are mostly affected by two types of shales:
Jan 1, 2014
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Coal Pillar Design in Tabas Central Mine of Iran
By Mostafa Sharifzadeh, Ebrahim Ghasemi, Kourosh Shahriar
"The Tabas Central Mine (TCM) is one of the underground coal mines located in the Tabas coal region, in the mid-eastern part of Iran. This mine is the first mechanized coal mine in Iran that uses the
Jan 1, 2010
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Surface And Borehole Microseismic Monitoring Of Longwall Faces; Their Potential For Three-Dimensional Fracture Imaging And The Geomechanical Implications.
By Styles P.
To determine whether 130 felt earth tremors around Edwinstowe, Nottinghamshire U.K, which also experienced severe surface fissuring, were caused by coal extraction, a surface seismometer array was est
Jan 1, 1992
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Hydraulic Fracturing Of Sandstone And Longwall Roof Control - Implementation And Evaluation
By D. W. H. Su
Following a roof fall in the B12 headgate of a CONSOL Pennsylvania Coal Company (CCPC) underground coal mine in February 1998, CONSOL R&D and Exploration initiated an underground roof geology reconnai
Jan 1, 2001
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Using The Point Load Test To Determine The Uniaxial Compressive Strength Of Coal Measure Rock (993fe9c2-59a0-4335-9e4c-58da9811402f)
By John A. Rusnak
Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a
Jan 1, 2000
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Rock Mass Classification As An Aid To Estimating The Strength Of Coal Pillars (77026f3a-8230-4eb0-afbc-609f7a2ad471)
Coal mass strength properties must be estimated to obtain realistic estimates of coal pillar strength. The limitations of existing techniques for approximating these properties are discussed. The coal
Jan 1, 1992
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A Procedure for the Rapid Assessment of Coal Mine Roof Stability against Large Roof Falls
By Ted Klemetti, Gabriel Esterhuizen, John L. Ellenberger
"Advanced numerical models can be used to evaluate entry support systems in coal mines. However, these methods require specialized software and specialized skills to create the models and evaluate the
Jan 1, 2015
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Strata Control Investigations During Fully Mechanized Coal Pillar Extraction in Indian Coalfield
By Rajendra Singh
Considering the importance of a fully mechanized depillaring operation, the Indian coal mining industry has introduced a number of such depillaring operations at depths of cover ranging from 60 m to 3
Jan 1, 2014
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Analysis of the Design and Performance Characteristics of Pumpable Roof Supports
By Timothy Batchler
"Pumpable roof supports are currently being used to provide a safe working environment for longwall mining. Because different pumpable supports are visually similar and installed fundamentally in the
Jan 1, 2016
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Optimization Research on Flexible Shield Supports Mining Method in Steeply Coal Seam
By Bingjie Huo
"China is a major coal producer and consumer. It is necessary to mine the steeply pitching coal seams due to development of the coal industry to meet the increasing needs for coal. Flexible shield sup
Jan 1, 2010
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Observations of Impacts to Pennsylvania's Interstate Highways by Longwall Mining
By Anthony Iannacchionc, Jessica Benner, Harold Miller, Megan Witkowski
"Longwall bituminous coal mining has been practiced in Pennsylvania since the 1970""s. Hundreds of longwall panels have been mined during the last 40 years but only 24 have actually undermined Pennsyl
Jan 1, 2010
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Roof Span Design for Underground Stone Mines
By Essie Esterhuizen, John Ellenberger, Dennis Dolinar
"Underground stone mines in the United States use the room-and- pillar method of mining. The stability of the roof between pillars determines the mining dimensions and size of equipment that can be us
Jan 1, 2010
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Merging Coal Mine Geologic Hazard Mapping with Mine Production Rates—Industry Experience
By Kevin Andrews, Scott Nelson, Terry Hamrick
"In the process of Geologic Hazard Mapping (GHM) for underground coal mining, geologists evaluate the effects of various geologic and geotechnical conditions to assist with optimization of mine produc
Jan 1, 2018
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Mechanism and Prediction of Ground Surface Subsidence Due to Multiple-Seam Longwall Mining
By Gang Ren, Behrooz Ghabraie
"Observational data suggest that the ground surface subsidence profile from multiple-seam longwall mining is rather different from that of single seam. Despite the increase of coal production from mul
Jan 1, 2016
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The Limitations and Potential Design Risks When Applying Empirically Derived Coal Pillar Strength Equations to Real-Life Mine Stability Problems
By Guy Reed, Russell Frith
"The method of determining coal pillar strength equations from databases of stable and failed case histories is more than 50 years old and has been applied in different countries by different research
Jan 1, 2018
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High-Precision Dynamic Subsidence Prediction Model Aided by Field Measured Data
By Yuanfei Chen, Jianfeng Zha
"China is the largest producer and consumer of coal in the world. The mining-induced surface subsidence has bad influences on the surface and structures above the surface. In order to minimize disaste
Jan 1, 2017