摘要
Abstract
In response to the problem of excessive support in the on-site design of the 5109 working face return air roadway of Ruilong Coal Industry,methods such as on-site measurement,theoretical calculation,numerical simulation analysis and others are used to determine that the roadway surrounding rock is Class II relatively stable surrounding rock;On the basis of the original support,the support form and support parameters are re optimized,and a support method of"anchor rod+anchor net"is designed and adopted.The row spacing of the optimized roadway roof anchor rod is 1.5 m×1.4 m,and the row spacing between the two sides anchor rods is 1.4 m×1.4 m.Compared with the original support,the number is reduced,the row spacing is increased,and the support cost is saved.The optimized support effect is basically the same as the original support through numerical simulation and comparative analysis.The on-site monitoring of the roadway roof and floor displacement,bracket working resistance,and the stress situation of the support anchor rod shows that the control effect of the roadway surrounding rock is good,meeting the needs of safe production during the stoping period.关键词
煤巷/支护/优化Key words
coal roadway/support/optimization分类
矿业与冶金
