采动下特厚煤层巷道顶板离层影响因素分析  

Analysis on factors affecting roof separation of roadway in extra-thick coal seam under mining influence

作　　者：邢鹏飞 孙余好 吴亚华 林成青 周煌 XING Pengfei;SUN Yuhao;WU Yahua;LIN Chengqing;ZHOU Huang(Nuclear Industry Jingxiang Construction Group Co.,Ltd.,Huzhou 313000,Zhejiang,China)

机构地区：[1]核工业井巷建设集团有限公司,浙江湖州313000

出　　处：《工程建设》2021年第5期12-17,共6页Engineering Construction

摘　　要：采动影响下特厚煤层沿底巷道顶板离层的演化特征为判断矿山巷道顶板垮冒发生条件、预测巷道顶板垮冒和制订顶板垮冒防治对策提供了重要理论基础。本文针对山西塔山煤矿辅运巷道受临空开采以及超前应力影响。顶板离层显现明显顶板变形量大的问题,开展采动影响下特厚煤层沿底巷道顶板离层分析。通过对塔山矿区典型煤岩样品的物理力学性能进行测试,获得单轴抗压强度、弹性模量、泊松比、黏结力和单轴抗拉强度等参数。采用UDEC软件研究巷道变形得出结论:巷道埋深、侧压系数、弹性模量、内聚力及巷道宽度是影响特厚煤层沿底巷道顶板离层的主要因素。Under the mining influence,the evolution characteristics of roof separation in roadway along the bottom of extra-thick coal seam can provide important theoretical basis for judging the occurrence conditions of roof collapse in mine roadway,predicting the roof collapse of roadway and formulating the prevention measures of roof collapse.In view of such problems as the auxiliary transport roadway in Tashan Coal Mine in Shanxi affected by goaf mining and advanced stress,obvious roof separation,and large roof deformation the roof separation of roadway along the bottom of extra-thick coal seam under the mining influence is analyzed.Such parameters as uniaxial compressive strength,elastic modulus,Poisson's ratio,cohesive force and uniaxial tensile strength are obtained by testing the physical and mechanical properties of typical coal and rock samples in Tashan mining area.Conclusions are drawn based on UDEC software to study roadway deformation that roadway buried depth,lateral pressure coefficient,elastic modulus,cohesion and roadway width are the main influencing factors of roof separation along the bottom of extra-thick coal seam.

关 键 词：特厚煤层 采动影响 顶板离层 数值模拟 

分 类 号：TD327.2[矿业工程—矿井建设]