Research and application of water hazard exploration and control technology in complex mine structure area
In view of the threat of high-pressure water and hidden collapse pillars,faults and fractures in the thin layer of gray rock aquifer and the Ordovician aquifer under the coal seam in part of the mine field,special water control technology research is carried out to ensure the production safety of the mine.The ground area treatment project included the construction of 2 main holes,16 branch horizontal holes,and 2 secondary branch holes,with a total drilling advance of 11,778.31 m,cumulative cement injection of 14,820.45 t,and fly ash injection of 29.15 t.The underground drilling project included 1 wild green hole,6 mountain-folding green holes,and 16 regional treatment effect test holes,with a total advance of 2,994.5 m and cumulative cement injection of 82.9 t.After second search of the geophysical anomaly range,the 3#and 7#anomaly areas have been eliminated.After underground drilling verification,the water temperature and pressure of the drill holes are consistent with those of other drill holes in the area,and the anomaly is excluded.Through the implementation of this project,1.2 million tons of new coal production were added,and the economic benefits were about 92.4 million yuan,ensuring the normal production of the mine.
万方数据
维普
