Research on the deformation mechanism and control technology of roadway perimeter rock in soft and broken bedrock coal seam
In view of the serious deformation and failure of broken surrounding rock roadway and the difficulty of traditional support technology to control the stability of surrounding rock,No.93 下 11 tromsport roadway of Jining No.2 Mine was taken as the engineering background.According to the results of the ground stress test and drilling peeping,the technical parameters of the original support scheme were optimized,and the support technical parameters were determined by numerical calculation.The results of field practice showed that:after adopting the optimization support scheme,the maximum deformation of roadway roof,two sides and floor was 55 mm,76 mm and 24 mm respectively.The application effect was good,and the stability of broken surrounding rock roadway was effectively controlled.
fractured perimeter rockdeformation mechanismborehole peepingoptimization support
万方数据
维普
