高瓦斯矿井底抽巷合理布置及现场监测研究OA

In order to solve the problems of gas emission,flow and accumulation caused by working face mining,and reduce the influence of working face mining on the roof and floor of bottom drainage roadway,this paper takes 150505 working face of Maijie Coal Industry as the engineering background,and uses theoretical analysis,numerical simulation and field monitoring methods to study the best layer of bottom drainage roadway in this working face.Through the theory of floor slip line field,the maximum failure depth of the floor is 31.58 m,and the failure depth of the floor is 30.90 m by FLAC3D numerical simulation software.Through the field monitoring,the final change of the displacement of the roof and floor of the roadway is 450 mm,and the shrinkage of the two sides is 370 mm.Finally,it is determined that the best horizon of the bottom drainage roadway is arranged at about 32 m,which can meet the needs of safety production.This study can not only solve the problem of gas emission in the coal mine,but also provide reference for the selection of the bottom drainage roadway with similar geological conditions.