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顶板较硬的9#煤层工作面使用切顶支柱,改善了回柱放顶和大面积悬顶的管理难题,简化了回采工艺,节约了材料消耗,保证了采煤工作面的安全、高效生产。
The roof of the hard 9 # coal seam working face using cut-top pillars to improve the backstop and a large area of suspended roof management problems, simplifying the mining process, saving material consumption, to ensure the safety of coal mining face, efficient production .