ground failures in coal mines with weak roof

  • CDCMiningGeologic Hazards and Roof Stability in Coal

    Development and Application of the Coal Mine Roof Rating (CMRR) Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines Geologic Characterization Ground Failures in Coal Mines with Weak Roof Horizontal Stress The Introduction of Roof Bolting to U.S. Underground Coal Mines (1948-1960) A Cautionary Tale

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  • MSHACoal Mine Fatal Accident Investigation Report

    MINE SAFETY AND HEALTH ADMINISTRATION District 4 REPORT OF INVESTIGATION (UNDERGROUND COAL MINE) FATAL FALL-OF-ROOF ACCIDENT Camp Creek Mine (ID No. MINE SAFETY AND HEALTH ADMINISTRATION District 4 REPORT OF INVESTIGATION (UNDERGROUND COAL MINE) FATAL FALL-OF-ROOF ACCIDENT Camp Creek Mine (ID No. 46-05121) Rockspring Development Inc. East Lynn Wayne County West ia April 10 2002 By Roger D. Richmond Coal Mine Safety and Health Inspector Don Winston Get Price
  • Ground Control in Coal Mines in Great Britain

    2006 Coal Operators Conference The AusIMM Illawarra Branch 10 67 July 2006 GROUND CONTROL IN COAL MINES IN GREAT BRITAIN James Arthur 1 ABSTRACT In deep coal 2006 Coal Operators Conference The AusIMM Illawarra Branch 10 67 July 2006 GROUND CONTROL IN COAL MINES IN GREAT BRITAIN James Arthur 1 ABSTRACT In deep coal mining support of the underground roadway is fundamental and without knowledge of the mechanics of ground control a mine is unlikely to be operating safely and efficiently.Get Price
  • MINING IN A Technical DATA-DRIVEN WORLD ANNUAL

    that a weak floor has on roof and pillar stability. This case study will provide important information to limestone mine operators regarding the impact of weak floor causing the potential for roof that a weak floor has on roof and pillar stability. This case study will provide important information to limestone mine operators regarding the impact of weak floor causing the potential for roof collapse pillar failure and subsequent subsidence of the ground surface. MONDAY FEBRUARY 22 2 00 PM Coal Energy Carbon ManagementGet Price
  • Roof FallYouTube

    Click to view4 31

    Jun 24 2012 · The roof had collapsed onto the track and prevented us riding in on the man-trip Website christopheremersic.

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  • Influences of Water Vapor on Roof Fall Accidents in

    Therefore it can be concluded that tensile failure at weak sedimentary planes due to the seasonal decrease in tensile strength by the vapor migration into the rock mass would have been playing an important role for the roof falls at Malawian coal mines. The

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  • Shale Failure Mechanics and Intervention SpringerLink

    Oct 12 2015 · Ground control research in underground coal mines has been ongoing for over 50 years. One of the most problematic issues in underground coal mines is roof failures associated with Ground control research in underground coal mines has been ongoing for over 50 years. One of the most problematic issues in underground coal mines is roof failures associated with weak shale. This paper will present a historical narrative on the research the National Institute for Occupational Safety and Health has conducted in relation to rock mechanics and shale. Get Price
  • Reference Coal Mining Geology Kentucky Geological Survey

    Hill J.L. III and E.R. 1984 An investigation of the causes of cutter roof failure in a central Pennsylvania coal mine A case study Twenty-fifth Symposium on Rock Mechanics Society of Mining Engineering American Institute of Mining Metallurgical and Petroleum Engineers (AIME) p.

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  • Weak Floor Stability During Perimeter Mining In The

    Jan 01 2009 · Perimeter mining is a special form of very productive partial extraction method practiced at some mines in the United States. In the Illinois Basin mines where all major coal seams have weak underclay in the immediate floor experience shows that any long-term ground control issues will arise due to floor failures rather than instability of the coal pillar itself.

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  • Mine Roof Condition and the Occurrence of Roof Falls in

    ABSTRACT. Mine roof fall characteristics of 250 falls in 5 different room-and-pillar coal mines located in Pike Martin and Floyd counties Kentucky were investigated to determine the relationship of selected parameters associated with roof failure and the assumed condition of the mine roof before failure. The selected parameters used in

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  • Figure 15 from Overview Of Coal Mine Ground Control Issues

    Figure 15 — Safety and productivity in U.S. longwall mines that use roof screen vs. longwall mines that do not use roof screen (2003 through 2005)."Overview Of Coal Mine Ground Control Issues In

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  • Observations and analyses of roof T guttering in a coal mine

    Observations and analyses of roof guttering in a coal mine To eliminate control or minimize the risk of rockfalls pillar failure and roof and floor failure as a result of the instability associated with bord Observations and analyses of roof guttering in a coal mine To eliminate control or minimize the risk of rockfalls pillar failure and roof and floor failure as a result of the instability associated with bord and pillar mining it is necessary to understand the distribution of Get Price
  • SKIN FAILURE OF ROOF AND RIB AND SUPPORT

    SKIN FAILURE OF ROOF AND RIB AND SUPPORT TECHNIQUES IN UNDERGROUND COAL MINES By Eric R. 1 and Dennis R. Dolinar1 ABSTRACT Skin failures of roof and rib in underground coal mines continue to be a significant safety hazard for mine workers. Skin failures do not usually involve failure of the support systems but result from rock or coal

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  • Site Browser

    Many rock fall injuries can be prevented with roof screen but many coal mines are reluctant to use it due to added cost. in stopes continues to be a primary safety risk for miners in underground Many rock fall injuries can be prevented with roof screen but many coal mines are reluctant to use it due to added cost. in stopes continues to be a primary safety risk for miners in underground mines because this condition can result in failures of ground that lead to both injuries and death. Discussions of weak rock include drawrock Get Price
  • Discrete element modelling of cutter roof failure in coal

    Sep 01 2013 · Read "Discrete element modelling of cutter roof failure in coal mine roadways International Journal of Coal Geology" on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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  • Weak Floor Stability During Perimeter Mining In The

    Jan 01 2009 · Perimeter mining is a special form of very productive partial extraction method practiced at some mines in the United States. In the Illinois Basin mines where all major coal seams have weak underclay in the immediate floor experience shows that any long-term ground control issues will arise due to floor failures rather than instability of the coal pillar itself.

    Get Price
  • Geomechanical behaviour of laminated weak coal mine roof

    This paper describes a component of the results from an ARC-SPIRT funded collaborative research project between UNSW Powercoal Pty Ltd. and Springvale Coal Pty Ltd. The research project was aimed at identifying strategies for appropriate ground control in particularly weak and soft roof strata in underground coal mining.

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  • Simulation of roof shear failure in coal mine roadways

    Shear failure is a common failure mechanism in underground coal mine roadways and is usually caused by high horizontal stress acting on relatively weak roof rock. Fig. 1 shows an example of roof shear failure in a Chinese coal mine roadway.

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  • (PDF) FUNDAMENTALS OF COAL MINE ROOF SUPPORT

    The Coal Mine Roof Rating (CMRR) was developed by the U.S. Bureau of Mines as an engineering tool to quantify descriptive geologic information for use in coal mine design and roof support selection.

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  • Is Cape Breton mine somehow different than others that had

    Is Donkin somehow different than Phalen Lingan or Prince Mines with respect to the failure of roof bolts to secure a weak roof I m thinking not but

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  • Preventing Roof Falls in Weak GroundOneMine

    Jan 01 2019 · "Some of the weakest roof in United States coal mines is found in the Illinois Basin. Historically the Illinois Basin has also suffered from high rates of unplanned roof falls and rock fall "Some of the weakest roof in United States coal mines is found in the Illinois Basin. Historically the Illinois Basin has also suffered from high rates of unplanned roof falls and rock fall injuries. During the past decade however roof fall and rock fall injury rates have fallen dramatically and are now lower than the national average. Get Price
  • COAL MINER S HANDBOOK FOR ROOF AND RIB CONTROL

    problem in underground coal mines. Mining personnel have to cope with constantly changing geologic conditions every day. A cut of coal taken from the mining face opens up new territory and problem in underground coal mines. Mining personnel have to cope with constantly changing geologic conditions every day. A cut of coal taken from the mining face opens up new territory and potentially new hazards. Therefore it s important to understand that every coal mine has a unique set of conditions. What works to control roof and rib Get Price
  • FUNDAMENTALS OF COAL MINE ROOF SUPPORT

    FUNDAMENTALS OF COAL MINE ROOF SUPPORT By Christopher Mark Ph.D. 1 and Thomas M. Barczak2 ABSTRACT Roof supports can only be understood in conjunction with the rock structure that they support. The strength of the rock depends on geology and the loads are applied primarily by the in situ and mining-induced stresses.

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  • Advances in Coal Mine Ground Control ScienceDirect

    This chapter summarizes recent advances in coal mine ground control technology and practice from the operator s perspective. While many ground control research programs have been carried out over the past 60 years from the mine operator s perspective any new development in coal mine ground control technology can be segregated into two

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  • SKIN FAILURE OF ROOF AND RIB AND SUPPORT

    SKIN FAILURE OF ROOF AND RIB AND SUPPORT TECHNIQUES IN UNDERGROUND COAL MINES By Eric R. 1 and Dennis R. Dolinar1 ABSTRACT Skin failures of roof and rib in SKIN FAILURE OF ROOF AND RIB AND SUPPORT TECHNIQUES IN UNDERGROUND COAL MINES By Eric R. 1 and Dennis R. Dolinar1 ABSTRACT Skin failures of roof and rib in underground coal mines continue to be a significant safety hazard for mine workers. Skin failures do not usually involve failure of the support systems but result from rock or coal Get Price
  • 13 Review of Ground Failure Prevention Research Mining

    failures are reduced by 50 within 8 years (2) injuries by ground and roof support system failures are reduced by 25 within 5 years and by 50 within 8 years and (3) unplanned roof falls are reduced by 20 within 5 years and by 40 within 8 years" (NIOSH 2005a).

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  • Ground control failures. A pictorial view of case studies

    article osti_21149594 title = Ground control failures. A pictorial view of case studies author = Peng S.S. abstractNote = The book shows in pictorial views many forms and/or stages of types of failures in mines for instance cutter roof falls and cribs. In each case the year of occurrence is stated in the beginning so that the

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  • Coal mine roof rating (CMRR) rock mass rating (RMR) and

    The rock mass rating (RMR) has been used across the geotechnical industry for half a century. In contrast the coal mine roof rating (CMRR) was specifically introduced to underground coal mines two decades ago to link geological characterization with geotechnical risk mitigation.

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  • 9781681172590 Coal Mine Ground ControlAbeBooks

    The book reviews current general practices in underground mine layouts roof control and common ground control failures and the discussion of the state-of-the-art of coal mine ground control The book reviews current general practices in underground mine layouts roof control and common ground control failures and the discussion of the state-of-the-art of coal mine ground control technology. The book will also prove useful to practical engineers involved in either the design or the day-to-day operations of underground coal mines. Get Price
  • Ground Control in China s Coal Mine Progress and Prospects

    Ground control in China s coal mine progress and prospects to control the hard roof and gas of the No. 8 coal seam. Failure depth of the No. 7 coal

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  • Welcome to CDC stacks

    Ground control research in underground coal mines has been ongoing for over 50 years. One of the most problematic issues in underground coal mines is roof failures associated with weak shale. Ground control research in underground coal mines has been ongoing for over 50 years. One of the most problematic issues in underground coal mines is roof failures associated with weak shale. This paper will present a historical narrative on the rese Get Price
  • Discrete element modelling of cutter roof failure in coal

    Cutter roof failure is a common failure mechanism in coal mine roadways due to the oblique orientation of the major horizontal stress with respect to roadway advance direction. In the present study two 3D numerical models based on the discrete element method have been developed to simulate cutter roof failure.

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