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Download . Let's Connect. Share Add to Flag Embed . Copy embed code: Embed: Flash Copy ... Direction of retreat FACE Bottom Gate TOP Gate LONGWALL GENERAL LAYOUT Dip direction Longwall mining method includes drivage of two long roadways in coal and joining them at the end by a perpendicular drivage forming a face. Different Longwall Methods ...

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LONGWALL MINING Overview. In the method of secondary extraction known as longwall mining a relatively long mining face (typically …

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Sep 10, 2012· This video provides a basic description of the longwall mining method for extracting coal underground. It includes an explanation of the different products/k...

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Underground Mining Methods Group 5 Underground Mining Methods Coal Mining Metal Mining Bord and Pillar Unsupported Mining Supported Mining Caving mining Longwall Room and Pillar Cut and fill Longwall Blasting galllery Stope and Pillar Stull Sublevel caving Shrinkage Square set Block caving Sublevel Longwall mining method: • …

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LONGWALL MINING Overview. In the method of secondary extraction known as longwall mining a relatively long mining face (typically in the range 100 to 300m but may be longer) is created by driving a roadway at right angles between two roadways that form the sides of the longwall block, with one rib of this new roadway forming the longwall …

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Download ... Venkat Masabattula ... TOP Gate FACE Dip direction Bottom Gate - Longwall mining method includes drivage of two long roadways in coal and joining them at the end by a perpendicular drivage forming a face. 19. ...

Starting around 1900, mechanization was applied to this method. By 1940, some referred to longwall mining as "the conveyor method" of mining, after the most prominent piece of machinery involved. Unlike earlier longwall mining, the use of a conveyor belt parallel to the coal face forced the face to be developed along a straight line. The only other …

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INTRODUCTION TO LONGWALL MINING AND SUBSIDENCE 3 1.1. ... When coal is extracted using this method, the roof immediately above the seam is allowed to collapse

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