| Coal resources affected by geological conditions,mining technology and the influence of mechanical equipment is the main energy in our country,at the same time domestic coal mine disasters and accidents still occur.Among various kinds of accident disasters,flooding accident is in the first place.Mine flooding accident is one of the five major disasters in the process of mine construction and production,it causes serious damage to the state and the people’s life and property,meanwhile the mining enterprises property and staff’s safety of life constitutes are threatened.As 16#coal seam in the Limin coal mine 16112 working face belongs the pressure mining on the confined water,therefore,in this paper,the mining of 16112 working face of confined water safety feasibility research has important theoretical significance and practical value.This paper arranges and studys the Limin coal mine hydrogeological information,through the drilling test,it carry on water test of 16#coal floor strata pressure,meamwhile it analyses according to the result of the pressure water test of floor strata and permeable rate and permeability between the limestone.Then it carrys on the observation of mine pressure adjacent working face,and it haves numerical simulation using the software of UDEC for the 16112 face appeared to the underground pressure and the maximum damage depth of working face.Numerical simulation shows the failure process of the appeared rule of mine pressure and bottom rock in the way of visual images dynamics,through the rule of the mine adjacent face pressure appearance it validates the reliability of numerical simulation.Combining with theoretical analysis,empirical formulation and numerical simulation of face slab maximum damage with depth.Finally,through water inrush coefficient method and the safety of water prevention coal(rock)columns it tries to determine the feasibility of the mining on the confined water. |
