Numerical Simulation Study and Application of Cutting and Unloading of Hard Top Plate
In response to the problem of large deformation of the roadway along the goaf of deep thick coal seam coal roadway due to the influence of working face mining,the distribution of surrounding rock stress and roadway displacement was analyzed using FLAC simulation software and combined with on-site measurements,taking the 151301 transportation channel of coal seam 15 as the engineering background.The comparison results of two schemes show that when the top cutting height is 16.5 m,the top cutting pressure relief is most reasonable,and the average stress value of the top plate after top cutting is reduced by about 50％.This conclusion can provide reference for other similar engineering problems.
top cutting and pressure reliefnumerical simulationleaving alleys along the empty space
万方数据
维普
