“三软”不稳定煤层过老巷实践

Practices of ″Three soft″ unstable coal seam crossing old roadway

介绍了郑煤集团米村煤矿-150水平28采区专用回风巷,在"三软"不稳定煤层中施工时,根据穿越老巷的实际位置,制定出切实可行的施工方案,有效地解决了施工中的顶板管理难题。

At the return airway at No.28 horizontal mining area 150 meters underground of Zhengzhou Coal Group＇s Mi Cun Coal Mine, when ＂Three soft＂ unstable coal seam is mined, operable schemes are set out according to different actual points crossing old roadway so as to deal with the problems occurred in course of construction.