贵州沿空留巷支护技术的分析与改进

Analysis and Improvement of Gob-Side Entry Retaining Support Technology in Guizhou

针对贵州某煤矿沿空留巷在原有支护条件下,靠上帮一侧顶板以及下帮底角的岩层变形破坏较严重的情况,对巷道支护方式进行改进。利用数值模拟软件,对改进支护后的巷道围岩变形破坏情况进行分析。研究发现:改进支护后的巷道围岩变形破坏情况得到明显改善,改进后的支护方式能够较好地阻滞巷道上帮一侧顶板和下帮底角的岩层严重变形破坏,从而保持巷道围岩的完整性和稳定性,研究可为类似条件矿井沿空留巷的支护方式提供参考。

In view of the serious deformation and failure of the roof of the upper side and the bottom corner of the lower side under the original support conditions of a gob-side entry retaining in a coal mine in Guizhou,measures are taken to improve the roadway support mode.The numerical simulation software is used to analyze the deformation and failure of roadway surrounding rock after improving the support.It is found that the broken condition of roadway surrounding rock is obviously strengthened under the improved support,which can better block the serious deformation and damage of the roof rock on the upper side of roadway and the bottom angle of the lower side,so as to maintain the integrity and stability of roadway surrounding rock.The research can provide reference for the support of gob-side entry retaining under similar conditions.