Practice of surrounding rock control technology of 31301 transportation roadway in Jinjie Coal Mine
Serious roadway deformation occurs in the transportation roadway caused by the mining of the working face,which seriously endangers the underground transportation and production safety.In order to effectively solve a series of support safety accidents caused by the mining of the working face,taking the 31301 transportation roadway of Jinjie Coal Mine as the research background,through on-the-spot investigation,the failure reasons of the original support of the transportation road-way are analyzed,so as to provide the basis for optimizing the support scheme,and the optimized scheme is verified by nu-merical simulation and engineering measurement.The results show that the expansion crack and stress concentration are the internal causes of the failure of the original support of the roadway.The numerical simulation shows that the optimized com-bined support scheme can effectively control the deformation of the roadway.The effectiveness of the optimized combined support scheme is further verified by field measurement,which can provide reference for similar projects.
transportation roadwaycombined supportsupport optimizationsurrounding rock stabilityengineering measure-ment
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