厚煤层区段小煤柱切顶护巷研究及应用
杨竹军
Research and Practice of Cutting Pole Protection for Narrow Coal Pillar in Thick Coal Seam Section of Changping Coal Mine
q 11
煤炭工程 . 2019, (5): 82 -86 .  DOI: 10.11799/ce201905020