Optimization and numerical analysis of mining roadway support parameters

The optimization of mining roadway support parameters，based on the surrounding rock mechanical properties，can ensure the stability of surrounding rock and save the cost of support.In order to solve the supporting problem of the roadway support design lead by adopt engineering analogy method，this paper chose the suspension theory to optimize the design of support and designed three optimization schemes under the research background of the 8302 crossheading condition of a coalmine，based on its characteristics of hard roof and with the optimization factors of row spacing between bolt and anchor cable.The FLAC^3D numerical simulation software was used for the simulation study of the stress field，displacement field and plastic zone，the research proved that the second optimization parameters is most favorable to the stability of surrounding rock of the roadway.Field monitoring shows that the second scheme can effectively control the stability of surrounding rock，which can provide a reference for the optimization of roadway support.