Water prevention and control technology for 814 working face of Huangling No.1 Coal Mine
With the increasing depth of coal mining,the underground hydrogeological conditions are becoming more com-plex,and the inadequate prevention and control measures of mine water disasters would cause water disasters.Taking the 814 mining face of Huangling No.1 Coal Mine as an example,this paper analyzes the water disaster control situation of the mine.The water disaster of 814 working face in the mine is mainly the sandstone fissure water in the overlying Yan'an Forma-tion and the lower section of Zhiluo Formation.In order to reduce the threat of the overlying aquifer,the underground geophysi-cal exploration was carried out,three water-rich abnormal areas were delineated,and the underground water exploration and drainage project was carried out.The drilling footage was 5 900 m,and the total amount of water drainage was 1.5 × 105 m3.After continuous observation,the dynamic water inflow of the roof drainage borehole in the working face continues to decay steadily.Finally,the water inflow of the borehole is stable at 0～10 m3/h,and the water pressure is 0～2 kPa,which effec-tively reduces the water hazard threat of the sandstone fissure water in the Zhiluo Formation of the roof.The water disaster control of 814 working face has achieved good results,which provides guidance for coal mine water prevention and control work.
direct current methodtransient electromagnetic methodsandstone fissure waterwater disaster management
万方数据
维普
