Numerical Simulation Of Mine Discharge On Former Auxiliary Inclined Shaft In Panjiayao Coal Mine

Mine discharge is the inflow water of unit time into mine workings during the process of mine production and mine construction. The research about mine discharge is a very important content during mine production and construction. The characteristic and intensity of mine discharge are determined by the condition of mine discharge, finding out the condition of mine discharge is conducive to accurately predict mine discharge and can effectively prevent and control the phenomenon of mine discharge. The source of mine discharge is varied, including groundwater, precipitation, surface water, hydrops in waste mine workings and so on. Mine discharge is an important index to determine deposit hydrogeological condition, providing important basis for mine drainage and preventing water design. Accurately predicting the mine discharge has important significance for preventing mine safety accidents, controlling mine production congstruction project investment scale, reducing mine production cost and improving mine production efficiency. The article discussed the matter with the research object of three strands of groundwater discharge from former auxiliary inclined shaft in Panjiayao coal mine according to realizing the internal and overseas forecasting mine discharge.Panjiayao coal Co., LTD integrates with former Panjiayao associated mine and Cuijialing mine. It is located south 6km of Caozhuang village, Jingping town, Pinglu, Shuozhou. The shape of the mine is polygon,east-west 4.30km, north-south 4.22km, the acreage is 7.897km2.The research object of the article is the problem of three strands of groundwater discharge from former Cuijialing mine auxiliary inclined shaft before integrate Panjiayao mine, research area is selected certain scope of former Cuijialing mine auxiliary inclined shaft esat in Panjiayao mine.The wellhead elevation of the former Cuijialing mine auxiliary inclined shaft is 1257.17m, inclination is 23o. There are three strands of groundwater discharge from more than 60 metres to the wellhead in the auxiliary inclined shaft, then the water washes into the inclined shaft, two strands of water discharge point locate in the feet of the inclined shaft,the elevations are 1233.34m and 1230.29m. another strand locates in the top of the inclined shaft,68m away to the well head.Three strands of the mine discharge are 13.17m3/h,10.71m3/h and 4.20m3/h, the total is 58.08m3/h. According to collecting material, investigation, hydrogeology exploration, the article finds hydrogeological condition of the mine and research area, explores the supply source and approach of the mine discharge on former auxiliary inclined shaft, finds out water abundance of groundwater on the research area, Analyses the influence of reservoir leakage on and the approach of leakage washing into former auxiliary inclined shaft in Panjiayao coal mine. Generalized reasonably the hydrogeological condition on the research area, established the mathematical model according to hydrogeological conceptual model,applied international advanced Visual Modflow professional software system to solving the above mathematical simulation model,and identified the model by using the known water level data of the observation hole. According to the model already recognition, we can forecast the influence to mine discharge of the former auxiliary inclined shaft in Panjiayao coal mine former when the reservoir water level changed.