Numerical Simulation Study on Reasonable Parameters for Roof Cutting and Pressure Relief of Hard Roof
In order to solve the problem of difficult collapse and falling of hard roof,this article uses numerical simulation software to analyze the cutting effect under different cutting heights and angles.By analyzing the stress and subsidence of the roadway roof under different cutting heights and angles,the optimal height is 11 m,and the optimal cutting angle is 10°.After analyzing the optimal cutting angle and cutting height,it was found that the stress on the coal pillar and roadway roof decreased significantly after cutting,and the roadway was in a low stress environment,which was conducive to controlling the stability of the roadway.
numerical simulationcutting heightcutting anglehard top plate
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