Analysis and Application of Numerical Simulation on Cutting Top and Unloading Pressure with Multiple Angles
In order to solve the problem that the hard top plate is difficult to collapse and fall,which causes the danger of the mining road-way to increase,the numerical simulation of roof cutting and pressure relief is studied and analyzed.The author used numerical simulation software FLAC3D to analyze and compare the effect of roof cutting under different roof cutting angles,and determined that the best roof cutting angle is 10°.Analyzing the effect of pressure relief under the optimal roof-cutting angle,it is found that the design should take into account the rock properties of the roof plate and the stability of the short-arm structure of the roof-cutting,and it is more conducive to the maintenance of the stability control of the roadway when the roadway is in a low-stress environment.
roof-cutting decompressionnumerical simulationalong the hollow stay roadwayroof-cutting angle
NETL
NSTL
万方数据
