Abstract:
In order to solve the support difficult problem of roadway under superimposed abutment pressure of adjacent mining goaf in Xiangshan Mining Area, the numerical simulation software of FLAC
2D and field test are applied. According the laws of the deformation of roadway under superimposed abutment pressure of adjacent mining goaf, we provide the support technology of pre-tightening total length self-drilling bolt + two sides structure reinforcing supporting technology. The result shows that the superimposed abutment pressure in mining goaf of 21303 and 21502 coal faces, and the distance between the ventilation roadway of 21503 coal face and peak value of superimposed abutment pressure is 10 m.The vertical stress is 20.7 MPa in the area of the ventilation roadway, and the stress concentration factor is 1.41. The whole displacement field is inhomogeneous to some extent, and the displacement of laneway's two sides is much bigger than roof and floor.