A.5m B.10m C.15m D.20m
A.煤層厚度:≥3.0m,采區(qū)回采率:≥70﹪ B.煤層厚度:≥3.5m,采區(qū)回采率:≥75﹪ C.煤層厚度:≥4.0m ,采區(qū)回采率:≥80﹪
A.煤層厚度:1.3~3.0m,采區(qū)回采率:≥80﹪ B.煤層厚度:1.3~3.5m,采區(qū)回采率:≥80﹪ C.煤層厚度:1.3~3.5m,采區(qū)回采率:≥85﹪