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Long Wall And Pillar Mining

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Long Wall And Pillar Mining

The invention discloses a long-wall working face coal pillar-free mining method which comprises the following steps of 1 digging an upper gate road tunnel and a lower gate road tunnel 2 reinforcing a roof plate of the lower gate road tunnel and drilling an energy collecting hole for presplitting blasting on the roof plate 3 recovering till that a gob is formed 4 blasting in

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