Simulation Analysis of Key Parameters and Filling Body Width for Roof Cutting of Goaf Retaining Roadway
In order to improve the success rate of retaining roadways along the goaf and reduce the deformation of the surrounding rock of the roadway,this paper uses numerical simulation software to study the roof cutting and pressure relief parameters of thick coal seam fully mechanized mining faces.The roof cutting effects under different roof cutting heights,angles,and widths of filling bodies are analyzed,and the roof deformation and stress curves under different roof cutting parameters are given.The optimal roof cutting height is determined to be 20.5 m,and the optimal roof cutting angle is 5 °.The optimal width of the filling body is 1.5 m,which provides reference for the subsequent setting of blasting cutting parameters along the goaf.
numerical simulationcutting heightcutting anglefilling body width
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