Simple Analysis of Safety Mining in 7₁30 Working Face Under Qidong Coal Mine Loose Aquifer

Qidong coal seams are covered by extremely thick loose layer.The"four content" of loose layer derectly covered on the coal seams,which is the threat water of shallow mining.According to the mining condition of No.1 and No.2 block segments of 7₁30 mining face,the safety evaluation of No.3 block segment is put forward.