顺序开采工作面小煤柱巷道布置方法研究

    Research on layout method of small coal pillar roadways in sequential mining faces

    • 摘要: 为减小顺序开采条件下小煤柱巷道布置面临的相邻工作面回采扰动及采空区覆岩运动影响,以巴彦高勒煤矿为例,提出1种“窄煤柱反掘+宽煤柱正掘”的小煤柱巷道布置方式,并分3个阶段分析了巷道布置的过程及相关影响因素;通过地表岩移观测分析,得出了采空区覆岩运动特征及稳沉距离。结果表明:盘区内工作面开采顺序的不同导致采空区覆岩运动特征存在差异性;采空区稳沉距离约为900~1 000 m;23104工作面回风巷布置过程中严格遵循反掘巷道滞后采空区的稳沉距离和正掘巷道长度的设置要求,完成了巷道的合理布置,保证了工作面平稳接续。

       

      Abstract: In order to reduce the influence of mining disturbance of adjacent working face and overlying rock movement of goaf on small coal pillar roadway layout under sequential mining conditions, taking Bayangaole Coal Mine as an example, a small coal pillar roadway layout method of “reverse excavation with narrow coal pillar + direct excavation with wide coal pillar” was proposed. The process of roadway layout and related influencing factors were analyzed in three stages, and through surface rock movement observation, the characteristics of overlying rock movement and stable settlement distance in the goaf were obtained to guide the practice of roadway layout. The results indicated that different mining sequences of working faces resulted in differences in the movement characteristics of overlying rocks in goaf areas, and the stable settlement distance of the goaf was about 900-1 000 m; during the arrangement of the return air channel in 23104 working face, the requirements for the stable settlement distance of the reverse excavation roadway lagging behind the goaf and the length of the direct excavation roadway were strictly followed, and the reasonable layout of the roadway was completed to ensure the smooth continuity of the working face.

       

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