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鹤壁四矿采区原采用岩石集中巷布置 ,水平大巷为煤层底板岩石大巷 ,通过 10多年在大巷以煤代岩的实践和探索 ,取得较好的技术经济效果
The mining area of Hebi No.4 mining area was originally designed with concentrated rocky lanes. The horizontal main road is the rock floor of the seam floor. Through more than 10 years of practice and exploration in the main road, it has achieved good technical and economical results