动压条件下综采厚煤层沿空掘巷支护优化

摘要

为解决动压条件下厚煤层沿空巷道难以维护的问题，以内蒙古某矿1902 N回风巷为研究背景，在分析沿空巷道围岩破坏机理的基础上建立窄煤柱受力特征的力学模型，通过沿空掘巷上覆岩层结构分析和力学计算，得出影响巷道稳定性的主要因素是实体煤帮承载能力和窄煤柱的稳定性，同时两者之间又存在相互联系，并在此基础上对沿空掘巷的支护方式及支护参数进行了优化。%To solve the difficult maintenance Problem of the roadway driving along the next gob of the fully mechanized face in the thick seam under dynamic Pressure,a mechanical model of the force-bearing characteristics of the narrow coal Pillar was established by taking 1902N air-return way in a mine in Inner Mongolia as the research background and based on the analysis of the failure mechanism of the roadway surrounding rock,and it came to the conclusion that the main factors affecting the stability of the roadway were the force-bearing caPacity of the solid coal wall and the stability of the narrow coal Pillar,and an interlink existed between the two factors. On this basis,the oPtimization of suPPort mode and Parameter was carried out for the roadway driving along the next gob.