Deformation and Damage Mechanism and Joint Support Technology for Deep Soft Multi-sectional Roadways
In order to solve the problem of large deformation of soft and multi-jointed roadway,21501 transport roadway of Xiangshan Mine is taken as an engineering example,and the deformation and damage mechanism of the roadway perimeter rock and the range of plastic zone are analysed through on-site investigation and drilling peeping.Based on the theory of three-soft coal seam roadway rock control,the optimised support scheme of"over-head pipe shed+long anchor cable+W steel belt/I-beam+double-layer mesh"is proposed,and the feasibility of the support scheme is verified through numerical simulation and engineering practice.The test results show that after adopting the optimised support scheme,the convergence speed of the two gangs and the top and bottom plates of the roadway is effectively reduced,and the convergence amount of the two gangs and the top and bottom plates of the roadway is 133.2 mm and 175.5 mm respectively,which ensures that the loose and soft multi-jointed roadway can be protected.This ensures the long-term stability of the loose and soft multi-jointed roadway.
soft multi-sectionallarge deformationborehole peepingsurrounding rock controllong-term stability
万方数据
维普
