| Gao Jia Liang coal mine located in Erdos City, Inner Mongolia,8km southeast of Dongsheng District Office, the mine design the size of an annual output of 6 million tons. Well built during the depth of 50～150m of Transportation Roadway Central has encountered a low-intensity soft rock, tunnel excavation and the construction process, cave, cave-ins occur, conventional bolting failure, caused by the construction safety and progress of significant. Based on geological conditions and the roadway characteristics of soft rock, according to tunnel surrounding rock loose circle theory and the surrounding rock and supporting role in the relationship, this article analyzes the deformation mechanism of soft rock roadway, roof instability mechanism and conventional reinforcement methods, and identified the major transport Lane reinforcement method.After checking, as well as numerical ADINA late roadway deformation monitoring of the transport curves have proven to meet the transportation roadway reinforcement of the supporting stiffness and strength requirements, while also strengthening the economic evaluation of the program, come to such a reinforcement program for the Gao Liang mine special reinforcement of soft rock roadway segment is technically feasible and economically acceptable conclusion. |
PDF Full Text Request