Bolt-cable combined support technology for three-soft thick coal seam
Due to the low strength of the surrounding rock of the three-soft coal seam,the deformation of the surrounding rock of the roadway is large under,which is easy to cause safety hazards.In order to solve the problem of roadway instability in three-soft thick coal seam,the east 1100 return airway of Weijiadi Coal Mine is taken as the research object,and the theo-retical analysis method is used to calculate and analyze the roadway support parameters.Combined with numerical simulation and field measurement results,the deformation and control of surrounding rock in three-soft coal seam roadway are studied,and a targeted design scheme of bolt-cable combined support is proposed.The research results show that the unstable sur-rounding rock range of the three-soft thick coal seam roadway is large,and the bolt support range cannot effectively control the surrounding rock structure,so the bolt-cable combined support scheme needs to be adopted.The results of numerical simulation and field application show that the support scheme has obvious effect on controlling the deformation of surround-ing rock of roadway,and the deformation of surrounding rock and the stability of roadway meet the requirements of safety production.
three soft coal seamroadway instabilitysurrounding rock stabilitybolt-cablecombined support
万方数据
维普
