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top coal caving mining method

top coal caving mining method

Underground coal production at gle turkey was originally won from conventional longwall mining drill and blast and more recently from the innovative use of the mechanised longwall top coal caving method this latter method was introduced to gain maximum tonnage from the extraction of an m lignite coal seam under very difficult mining

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  • Numerical modeling of longwall top coal caving method

    Numerical modeling of longwall top coal caving method

    The topcoal caving mining method, developed steadily in the past two decades, has become the main method for thick seam coal mining in china in recent years, the core research areas in the top

  • Determination for Ultra Thick Longwall Top Coal Caving

    Determination for Ultra Thick Longwall Top Coal Caving

    Mining methods are encouraged in china longwall top coal caving ltcc is an economical underground mining method that has been introduced and practiced in underground coal

  • 2194  Recognition of rock   coal interface in top coal

    2194 Recognition of rock coal interface in top coal

    Therefore, achieving automation for top coal caving mining is an important goal such automation requires highly accurate and rapid recognition of coal and rocks in the past decades, researchers have proposed many methods for recognizing coal and rock the most famous methods include ray detection , radar detection , , cutting force

  • Mining safety of longwall top coal caving in China

    Mining safety of longwall top coal caving in China

    Articleosti, title mining safety of longwall topcoal caving in china, author wu, j and qin, y and zhai, m, abstractnote longwall topcoal caving technology has developed rapidly in china, in recent years the application of longwall topcoal caving can double both the productivity and the efficiency of a working face and reduce the cost of

  • Gas Drainage Technology in Fully Mechanized Caving Face

    Gas Drainage Technology in Fully Mechanized Caving Face

    At present, the common mining method is horizontal sublevel caving due to the characteristics of horizontal sublevel fully mechanized topcoal caving face in steeply inclined superthick coal seam, such as large mining and caving ratio, difficult control of topcoal, selfunloading gas desorption and migration of bottom coal body, more coal

  • Radiation characteristics of natural gamma ray from coal

    Radiation characteristics of natural gamma ray from coal

    Jan , in china, coal is the main energy source, accounting for about of primary energy production and consumption ,Since top coal caving mining method has the advantage of highproduction, high

  • Caterpillar to supply two complete longwall top coal

    Caterpillar to supply two complete longwall top coal

    Jul , the longwall top coal caving ltcc mining method to be employed at the eynez east underground coal mine is a special type of longwall mining applicable to seams thicker than meters feet

  • Tutorials Mining     Official Minecraft Wiki

    Tutorials Mining Official Minecraft Wiki

    Feb , in the world of minecraft, mining is essential to a players progress however, it can be dangerous and timeconsuming if not done well below are some tips provided by the community for performing this underground work mining layers preparing to mine cave mining mineshafts caves under sand cave mining checklist shaft mining

  • Numerical Analysis of Top Coal Recovery Ratio by using

    Numerical Analysis of Top Coal Recovery Ratio by using

    This paper discusses numerical modeling of top coal caving mining method and studies the coal recovery ratio by using discrete element method in the modeling consequences, the total top coal recovery ratio was computed to be when the top coal thickness was three times the cutting height with the drawing interval of M respectively

  • Determination of Water Proof Coal  Rock  Pillar Height in

    Determination of Water Proof Coal Rock Pillar Height in

    The results show that the height of waterproof coal rock pillar is calculated as m when mining upper and lower groups and m when mining all coal seams at the same time according to udec numerical simulation results, the height of waterproof coal rock pillar is Ampxm when mining upper and lower groups and Amp

  • CN105604551A   Large mining height full mechanized caving

    CN105604551A Large mining height full mechanized caving

    The present invention discloses a large mining height fullmechanized caving mining method the method comprises the following steps acquiring cohesion c, body force gamma and an included angle of velocity vector of a spalling rib slider with a sliding surface of a coal seam and calculating coal wall critical stable height hcr by a formula, if the coal wall critical stable height

  • Prediction of top coal caving and drawing characteristics

    Prediction of top coal caving and drawing characteristics

    Topcoal caving is mainly used for the mining of thick coal seams , due to the advantages of high per unit area yield, low energy consumption, and simple roadway arrangement the topcoal caving method has been advanced in europe, implemented in china in the late s, and nowadays gained a wide popularity worldwide

  • Longwall Top Coal Caving  LTCC  Mining Technology

    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 M where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around m mining

  • Longwall Top Coal Caving Top Coal Caving Top Coal Caving

    Longwall Top Coal Caving Top Coal Caving Top Coal Caving

    Longwall top coal caving ltcc is a special designed longwall mining method for very thick seams thickness is more than M where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around m mining

  • Top Coal Movement Law of Dynamic Group Caving Method

    Top Coal Movement Law of Dynamic Group Caving Method

    Due to the unbalanced top coal drawing process, the recovery ratio is low, and the equipment stability is poor in the longwall top coal caving mining ltcc with an inclined seam aimed at these problems, this paper proposes the dynamic group caving method dgcm the basic procedure is that when the drawn volume of top coal from a support reaches about half, the

  • Top Coal Caving   Longwall   underground COAL

    Top Coal Caving Longwall underground COAL

    A brief description of longwall top coal caving ltcc is included at the end of the longwall section of the fundamentals of coal mining module of this web site despite the fact that there are numerous coal seams in australia which are thick enough for ltcc to be used to increase recoveries, potentially at a reduced costtonne, there has been

  • 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

  • Coal mining   Choosing a mining method   Britannica

    Coal mining Choosing a mining method Britannica

    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

  • SMERE Longwall Top Coal Caving   Apps on Google Play

    SMERE Longwall Top Coal Caving Apps on Google Play

    Apr , this app has been developed for the students of minerals and energy resources engineering mere subjects at the university of new south wales unsw, australia it is intended to provide an introduction to the longwall top coal caving ltcc mining method through an interactive simulation a degree view is provided of the cutting sequence at a

  • Numerical Analysis of Top Coal Recovery Ratio by using

    Numerical Analysis of Top Coal Recovery Ratio by using

    Caving mechanisms of loose topcoal in longwall topcoal caving mining method international journal of rock mechanics and mining sciences, , doi JIjrmms yasitli nE

  • Effect of Seam Dip On Face Orientation of Longwall Top

    Effect of Seam Dip On Face Orientation of Longwall Top

    Effect of seam dip on face orientation of longwall top coal caving hD quang hD quang university of new south wales search for other works by this author on

  • Determination of Water Proof Coal  Rock  Pillar Height in

    Determination of Water Proof Coal Rock Pillar Height in

    The results show that the height of waterproof coal rock pillar is calculated as m when mining upper and lower groups and m when mining all coal seams at the same time according to udec numerical simulation results, the height of waterproof coal rock pillar is Ampxm when mining upper and lower groups and Amp

  • Numerical modeling of longwall top coal caving method at

    Numerical modeling of longwall top coal caving method at

    The preferred mining method for these thick coal seams is the longwall top coal caving ltcc the connection of both the top coal caving and its compactness are still rare therefore, the capability of top coal caving mechanism is the most significant factor in ltcc that must be adequately explained and examined

  • 3D numerical modeling of longwall mining with top coal caving

    3D numerical modeling of longwall mining with top coal caving

    Article in press caving mechanism in the topcoalcaving methodundoubtedly, caving of naturally fractured or blasted top coal under gravity is the most critical factor in determination of mining methodrelated parameters such as geometry and dimensions of longwall panel, face support and production scheduling

  • Ultra thick Seam Longwall Mining in China   Coal Age

    Ultra thick Seam Longwall Mining in China Coal Age

    Oct , in top coal caving mining, the bottom m ft of the seam is extracted by the conventional longwall mining method and the remaining roof top coal is naturally caved behind the shield in this method, there are two armored face conveyors afcs at the longwall face, the front one located in front of the shield legs is operated

  • 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

  • Top Coal Movement Law of Dynamic Group Caving Method

    Top Coal Movement Law of Dynamic Group Caving Method

    Due to the unbalanced top coal drawing process, the recovery ratio is low, and the equipment stability is poor in the longwall top coal caving mining ltcc with an inclined seam aimed at these problems, this paper proposes the dynamic group caving method dgcm the basic procedure is that when the drawn volume of top coal from a support reaches about half, the

  • 3D numerical modeling of longwall mining with top coal caving

    3D numerical modeling of longwall mining with top coal caving

    Article in press caving mechanism in the topcoalcaving methodundoubtedly, caving of naturally fractured or blasted top coal under gravity is the most critical factor in determination of mining methodrelated parameters such as geometry and dimensions of longwall panel, face support and production scheduling

  • Numerical modeling of longwall top coal caving method at

    Numerical modeling of longwall top coal caving method at

    The preferred mining method for these thick coal seams is the longwall top coal caving ltcc the connection of both the top coal caving and its compactness are still rare therefore, the capability of top coal caving mechanism is the most significant factor in ltcc that must be adequately explained and examined

  • Numerical modeling of longwall top coal caving method

    Numerical modeling of longwall top coal caving method

    The topcoal caving mining method, developed steadily in the past two decades, has become the main method for thick seam coal mining in china in recent years, the core research areas in the top

  • Application of retreating and caving longwall  top coal

    Application of retreating and caving longwall top coal

    Underground coal production at gle turkey was originally won from conventional longwall mining drill and blast and more recently from the innovative use of the mechanised longwall top coal caving method this latter method was introduced to gain maximum tonnage from the extraction of an m lignite coal seam under very difficult mining

  • Longwall Top Coal Caving Mechanisms in the Fractured Thick

    Longwall Top Coal Caving Mechanisms in the Fractured Thick

    Aug , in this study, the finite difference method fdm coupled with a discrete fracture network dfn was utilized to analyze longwall top coal caving ltcc behaviors the integrated fdmdfn model enabled the influence of the preexisting fracture, stress redistribution, stress rotation, caving material compaction, and periodic rupture of roof

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