新元矿矸石充填工作面沿空留巷技术研究与应用

Research and application of gob side entry retaining technology in coal mining with gangue filling in Xinyuan mine

为进一步提高煤炭资源的回收率,在新元矿3211综采矸石充填工作面进行沿空留巷的应用研究。根据数值模拟结果,充填体宽度对巷旁充填体的侧向变形影响较大,但对巷道表面位移影响较小,结合理论计算分析,确定充填体的宽度为3.0 m。现场应用表明,3211工作面运输巷变形量小,能够满足下工作面的回采要求。

In order to further improve the recovery rate of coal resources,the gob side entry retaining in 3211 fully mechanized gangue filling face of Xinyuan mine was studied.The numerical simulation shows that the width of the filling body has a great influence on the lateral deformation of the filling body beside the roadway,but has little influence on the surface displacement of the roadway.Combined with the theoretical calculation results,the width of the filling body is determined to be 3.0m.The field application shows that the deformation of transportation roadway in 3211 working face is small,which can meet the mining requirements of the lower working face.It is of great significance to further improve the recovery rate of coal resources in resource exhausted mines.