山西一煤矿回采巷道围岩控制及支护研究

Surrounding Rock Control and Support of Mining Roadway in a Coal Mine in Shanxi Province

针对山西一煤矿1404工作面地质情况,通过现场调查、理论分析等方法分析了巷道变形与破坏的原因。高应力影响、巷道岩性较差、围岩强度不高、原支承参数不尽合理是围岩破坏的主要原因。在巷道围岩破坏发生前,通过增加支护阻力、提高临界载荷、抵抗巷道围岩破坏发生、采用高强锚网带加预应力带锚索优化支护方案能够有效控制巷道围岩变形。

According to the geological situation of the 1404 working face of a coal mine in Shanxi,the causes of roadway deformation and failure were analyzed by on-site investigation and theoretical analysis.High stress influence,poor roadway lithology,low strength of surrounding rock,and unreasonable original supporting parameters are the main reasons for the failure of surrounding rock.Before the occurrence of roadway surrounding rock failure,by increasing the supporting resistance,increasing the critical load,and resisting the occurrence of roadway surrounding rock failure,the application of optimal support scheme of high-strength anchor net belt and prestressed anchor cable can effectively control the deformation of roadway surrounding rock.