Optimization of Supporting Parameters for Deep Coal Roadway Considering Repeated Impact Dynamic Load

For the situation of large amount of deformation of surrounding rock and serious tunnel damage at 42101 measure roadway of Gaojiabao Coal Mine affected by impact dynamic load, combined with the deformation and damage of roadway surrounding rock, the characteristics of deformation and fracture of surrounding rock and the supporting effect of supporting structure are analyzed by means of bolts(cable) working resistance monitoring, theoretical analysis and numerical simulation methods. Based on these, the control measures and supporting optimization schemes for surrounding rock were proposed. Numerical simulation for deformation of roadway surrounding rock under different support schemes and considering multiple dynamic load is carried out, and the validity and rationality of optimization scheme is analyzed.