Optimization Study of Gob-side Roadway Support on Island Working Face under Multiple Mining
During coal mining,the migration of buried thin bedrock overburden is prone to oc-cur under high geo-stress,and the strong mining pressure induces the deformation and instability of the surrounding rock structure of the roadway.In the design of the 23206 belt transportation gateway of the new excavation roadway in the second mining area of Zhuanlongwan Coal Mine,this study employed various technical approaches based on its actual engineering geological condi-tions,including theoretical analysis,laboratory testing of physical and mechanical parameters of surrounding rocks,the detection of surrounding rock structures of the boreholes,the stability e-volution patterns of surrounding rock in strong mining roadways,and the numerical simulations.The research aimed to clarify the reasonable support technical requirements for the excavated strong mining roadways in Zhuanlongwan Coal Mine and analyze the surrounding rock stability under different support schemes during excavation to determine the support schemes for the 23206 belt transportation gateway.The results show that stress relief reduces stress values in shallow coal bodies,which is conducive to the formation of bearing structures in surrounding rocks and,to some extent,minimizes the surrounding rock deformation.Anchoring strengthened the shallow coal body of the coal walls,significantly reducing overall roadway deformation.Therefore,the"pressure relief-anchoring integration"collaborative stability control technology can cope with the strong mining roadways,especially the gob-side entry where the stress of the solid coal wall is concentrated.
island working faceroadway supportgob-side entrysurrounding rock control
万方数据
维普
