Reducing operation period of exposing coal seams in a crosscut by non - uniform hole layout 非均匀布孔缩短石门揭煤工期
2.
Application of deep - hole pre - splitting blast and coal body reinforcement technique by metal skeleton and grouting in a face by crosscut for exposing coal seam 深孔控制预裂爆破与金属骨架注浆加固煤体技术在石门揭煤工作面的应用