Preventive Method for Dynamic Load Tensile Failure of Anchor Rod(Cable)in Weakly Cemented Roadway of Hami Mining Area
Aiming at the control problem of roadway surrounding rock with weak cementation and complex conditions in Hami Mining Area,by methods such as theoretical modeling and mechanical analysis and so on,the types of roadway anchor rod(cable)tensile failure and their prediction and control method of dynamic load tensile failure of anchor rod(cable)are proposed.The research shows that there are two main tensile failure types for roadway anchor rod(cable)with weak cementation and complex conditions:high stress"static load"and mining"dynamic-static load";Establish a local structural spatial model of"support-surrounding rock",obtain the roadway rock mass is affected by dynamic vibration velocity and the anchor rod dynamic load impact force,and determine the judging basis for anchor rod tensile failure under"dynamic-static load"condition;Considering the action principle of the"support-surrounding rock"in the roadway and the two working states of limited deformation and given deformation,a control strategy for anchor rod tensile fracture is proposed with the core of"increasing the diameter of the anchor rod or increasing the support density,controlling the reasonable timing and strength of secondary support".The research provides theory and methods for quantitative optimization design of roadway support parameters.
国家科技期刊平台
NSTL
万方数据
