Water disaster prevention and control technology in shallow coal seam around the large reservoir in Shenfu coal mine

Taking the large Changjiagou reservoir in Shenfu coal mine as an example,using hydro-geological explora- tion,drill hole measurement,theoretical calculation and numerical simulation,the hydrogeological conditions in the vic- inity of Changjiagou reservoir were investigated. A formula of the height of water flowing fractured zone was put for- ward. Also,this paper studied the prevention and controlling technology of the coal seam mining for the vicinity of Changjiagou reservoir. The result shows that the height of water flowing fractured zone is about 72. 8 m,which mainly include the burnt rocks water inrush,Salawusu formation water-sand inrush,and Changjiagou reservoir water inrush. The water disaster problems surrounding Changjiagou reservoir mainly include the burnt rocks water inrush,Salawusu formation water-sand inrush,Changjiagou reservoir water inrush during mining. Based on the water inrush,the water control measures were put forward,which are coal protection pillar reserved,the curtain grouting and drainage underground,the water exploration-drainage underground combined with the drainage ground,the exploration and drainage of the goaf water overlying the coal seam,the channel cracks buried. During the 15207 working face mining,there were 28 boreholes drilled in the 4-2 coal burnt hydrothermal rock,and the curtain grouting was 625 m,the cumulative water discharge was 33 523 m3 based on coal protection pillar reserved.