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top coal caving mining method

Longwall Top Coal Caving LTCC is a special designed longwall mining method for very thick seams thickness is more than 45m where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around 5m mining height

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  • 3D numerical modeling of longwall mining with topcoal caving

    3D numerical modeling of longwall mining with topcoal caving

    Feb 01 2005 · Coal has been produced by means of longwall retreat with the topcoalcaving production method where a 28 m high longwall face was operated at the floor of the coal seam Topslice coal having a thickness of 52 m was caved and produced through windows located at the top

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  • Systems of Mining ore coal slicing caving method

    Systems of Mining ore coal slicing caving method

    Systems of Mining ore coal slicing caving method top system explosives pillars and cent The principal difference is that a single slice only is worked in these methods when applied to coal mining There are two modifications top slicing by drifts and top slicing by rooms

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  • Inside block caving the deep mining method of the future

    Inside block caving the deep mining method of the future

    The role of block caving Although the caving mining system was initially used for shallow orebodies it has recently been applied at depths of 2km underground According to Suorineni “caving heights have also increased drastically from about 200m to 500m” creating socalled ‘super caves’“There is insufficient experience caving in these environments” he adds which is a

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  • Types of Underground Mining Method Comparison

    Types of Underground Mining Method Comparison

    Table of ContentsFactors Affecting Choice of MethodReview of Stoping MethodsUnderhand Stoping Mining MethodOverhand Stoping MethodLongitudinal Back FlatBack Mining MethodLongWall StopingmMining MethodRillCut Stoping MiningSawTooth Back StopingShrinkage StopingMining by Combination StopingSide StopingBreast StopingSublevel StopingSquareSet StopingFilling MethodsCaving Methods

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  • Underground Mining Methods and Equipment

    Underground Mining Methods and Equipment

    Caving methods are defined as those associated w ith induced controlled massive caving of the ore body the overlying rock or both Th e exploitation workings in caving methods are designed to collapse with intentional caving of the ore andor host rock The three major caving methods are • Longwall mining • Sublevel caving

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  • top coal caving mining method

    top coal caving mining method

    Longwall Top Coal Caving LTCC Mining Technology Longwall Top Coal Caving LTCC is a special designed longwall mining method for very thick seams thickness is more than 45m where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around 5m mining height

    Get price
  • top coal caving mining method

    top coal caving mining method

    Longwall Top Coal Caving LTCC Mining Technology Longwall Top Coal Caving LTCC is a special designed longwall mining method for very thick seams thickness is more than 45m where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around 5m mining height

    Get price
  • Method of underground mining by pillar extraction Patent

    Method of underground mining by pillar extraction Patent

    Abstract A method of sublevel caving and pillar and top coal extraction for mining thick coal seams includes the advance mining of rooms and crosscuts along the bottom of a seam to a height of about eight feet and the retreat mining of the top coal from the rooms crosscuts and portions of the pillars remaining from formation of the rooms and crosscuts

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  • A Brief Comparison of Longwall Methods Used at Mining of

    A Brief Comparison of Longwall Methods Used at Mining of

    There exist several different methods in Turkey and in the world to operate longwalls of thick coal seams in underground mines The most important ones are Single Pass Longwall SPL MultiSlice Longwall MSL and Longwall Top Coal Caving LTCC In this paper these methods are compared to eachother both from the technical and economical perspectives

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  • Mining Safety of Longwall Topcoal Caving in China

    Mining Safety of Longwall Topcoal Caving in China

    53 Mining Safety of Longwall Topcoal Caving in China Jian Wu 1 Yueping Qin 1 and Minghua Zhai1 1China Univ of Mining and Technology 011 Xueyuan Road Haidian Dist Beijing 100083 PR of China 2Zhangji Coal Mine Xuzhou Mining Bureau Xuzhou 221147 Jiangsu Province PR of China ABSTRACT Longwall topcoal caving technology has developed rapidly in China in recent years

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  • Block caving A new mining method arises

    Block caving A new mining method arises

    Jul 25 2018 · Block caving is a new alternative method of developing new mines or extending the operation of open pits Block caving is an underground hard rock mining method that involves undermining an ore body allowing it to progressively collapse under its own weight It is the underground version of open pit mining

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  • Types of Mining Methods Sell Side Handbook

    Types of Mining Methods Sell Side Handbook

    Mar 09 2018 · Sublevel caving is a largescale mining method suitable for large ore bodies with a steep dip The setup is similar to longhole stoping except loft raises are not required Also mining starts at the top of the ore body and progresses downwards in a safe sequence

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  • What are the main methods of mining American

    What are the main methods of mining American

    There are four main mining methods underground open surface pit placer and insitu mining Underground mines are more expensive and are often used to reach deeper deposits Surface mines are typically used for more shallow and less valuable deposits Placer mining is used to sift out valuable metals from sediments in river channels beach sands or other environments

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  • Numerical Simulation on the Evolution of MiningInduced

    Numerical Simulation on the Evolution of MiningInduced

    The longwall top coal caving LTCC method is a new type of mining technique that is popular for thick coal seams in China due to its high efficiency and output However these largescale excavations seriously disturb the original equilibrium state underground and the mininginduced redistribution of stress leads to the initiation and

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  • Method of underground mining by pillar extraction Patent

    Method of underground mining by pillar extraction Patent

    Abstract A method of sublevel caving and pillar and top coal extraction for mining thick coal seams includes the advance mining of rooms and crosscuts along the bottom of a seam to a height of about eight feet and the retreat mining of the top coal from the rooms crosscuts and portions of the pillars remaining from formation of the rooms and crosscuts

    Get price
  • Mining Safety of Longwall Topcoal Caving in China

    Mining Safety of Longwall Topcoal Caving in China

    53 Mining Safety of Longwall Topcoal Caving in China Jian Wu 1 Yueping Qin 1 and Minghua Zhai1 1China Univ of Mining and Technology 011 Xueyuan Road Haidian Dist Beijing 100083 PR of China 2Zhangji Coal Mine Xuzhou Mining Bureau Xuzhou 221147 Jiangsu Province PR of China ABSTRACT Longwall topcoal caving technology has developed rapidly in China in recent years

    Get price
  • What are the main methods of mining American

    What are the main methods of mining American

    There are four main mining methods underground open surface pit placer and insitu mining Underground mines are more expensive and are often used to reach deeper deposits Surface mines are typically used for more shallow and less valuable deposits Placer mining is used to sift out valuable metals from sediments in river channels beach sands or other environments

    Get price
  • Latest Developments in Longwall Mining Technology

    Latest Developments in Longwall Mining Technology

    2015 6 Roof Support Technology Since 2006 Caterpillar has specialized in designing and supplying special shields for the longwall top coal caving method LTCC where extremely thick seams are being mined This method utilizes a second AFC behind the shields to take the coal on top of the longwall outside of the face

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  • top coal caving mining method

    top coal caving mining method

    top coal caving mining method Coal mining Coal mining Choosing a mining method The various methods of mining a coal seam can be classified under two headings surface mining and underground mining Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods and the choice of which method to use in extracting a coal seam

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