Research On The Feasibility Of Protective Coal Pillar With Paste-like Backfill Mining Under Highway In Xima Mine

According to the problems of huge under "three bodies" pressure coal in Xima coal mine and production splice tension, the paper carried out feasibility study to mine protection pillar under highway with method of paste-like backfilling.In accordance with the relevant provisions of national and local governments, to determine highway surface allow movement deformation range and select surface movement and deformation prediction method based on first determine the expected parameters depending on the geological and mining conditions, and calculation based on the measured data paste-like filling equivalent mining height face. Then based on the single face mining surface movement deformation predicted method, independently developed multi-face mining surface movement deformation expected method and expected software system. Surface movement and deformation caused by protection pillar under highway mining plan to take advantage of the system to predict. The results show that it appears local surface movement and deformation overrun phenomenon. Through a series of calculation and impact analysis, the individual size of faces has been adjusted. After predicted to prove again, the surface deformation caused by the mining plan after adjustment is allowed within the range, and this program is feasible, In order to reduce the filling cost and improve recovery efficiency, we have studied the possibility of reducing filling workload, and proposed mathematical out of mining depth and pack owe joint top height relation.Finally, in order to validate the analytical results and timely maintenance of highways, mining design ground monitoring program under highway.