Simulation Study on Shear Failure of Anchored Jointed Rock Mass Under Impact Dynamic Load
In order to explore the influences of different joint angles on the shear failure of anchored jointed rock mass under impact dynamic load,the dynamic shear numerical simulation of anchored rock mass with different joint angles under dynamic load impact was carried out based on ABAQUS software.The shear failure evolution process of anchored jointed rock mass under impact dynamic load,as well as the shear strain,shear stress and shear displacement of anchor rod when shear failure occurs were systematically analyzed.And the optimal anchorage angle scheme was proposed based on theoretical analysis.The results show that in the process of dynamic load impact,the bolt and rock mass provide different degrees of shear resistance of anchorage system in different impact periods.The shear strain,shear stress and shear displacement generated by the shear failure of the bolt are the largest when the joint angle of the anchored rock mass is 60°,larger than that at 90°,and reach the smallest at 45°.The optimal anchorage angle was verified in the range of 60°-70° by the optimal anchorage angle estimation formula.The research results have a certain guidance and reference significance for the reinforcement engineering of jointed rock mass in dynamic roadway.
Jointed rock massAnchorageShear characteristicsImpact dynamic loadNumerical simulation
万方数据
维普
