Abstract:
Aiming at the problem that is hard to support the roadway in the lower seam in Jinda very contiguous seams, the paper comprehensively analyzed the influence factors of support ways and parameters between the up and down seams on the mining gateways and studied the mechanism that cause the gateway failure. With the analysis and study, the paper put forward a scheme of applying combined support with anchor and I-steel Truss. FLAC
3D simulation results show that the roadway deformation is relatively small. Field studies show that the maximum convergence between roof and floor is 251 mm, the maximum both sides convergence is 83 mm, the support of the gateway is improved.