Based on the serious deformation of the roadway peripheral rock when the 602 transport tunnels of Changchunxing Coal Mine are excavated to expose the F4 fault under the influence of stress superposition,the joint support technology of"truss anchor cable+let pressure anchor cable+trapezoidal steel shed"is proposed,which is effectively controlled and speeds up the roadway excavation efficiency by the combined support technology.After adopting the joint support technology,the deformation and convergence phenomenon of the surrounding rock in the stress area has been effectively controlled,accelerating the tunnel boring efficiency,improving the tunnel forming rate,and achieving remarkable application results.
NETL
NSTL
万方数据
