Goaf water has a serious affect on the safe operation of coal production.The goaf water of two sides of Jianzhuang Coal Mine's 212 island working face,undoubtedly,increases difficulty in both exploration and discharge.Based on analysis of the hydrological conditions,buried conditions,distribution characteristics and water enrichment change law,calculation of goaf water and water-head pressure,and investigation of coal pillar's water-head bearing capacity,water-discharging cham-bers are constructed in belt transportation roadway and air-retaining roadway of the 212 working face,respectively,with each chamber having three borehole for discharging of the two sides'goaf water.Results show that the water-head pressure of the goaf water are 0.25 MPa and 0.23 MPa,respectively,which are below the coal pillar's water-head bearing pressure,leading to the stability of the coal seam.The exploration and discharge of the two sides'goaf water eliminates water disaster during the tunneling process of the 212 working face,thus realizing the safe tunneling of roadway.The study is of practical reference for goaf water prevention and control with the similar conditions.
关键词
孤岛工作面/采空区积水/探放水/水害防治
Key words
island working face/goaf water/exploring and discharging water/water disaster prevention and control
维普
万方数据