Research and Application of Advanced Prevention and Control Technology for Water Damage in Lower Coal Mining
There was a large amount of accumulated water in the goaf above 92105 driving face.In order to ensure the safe construction of 92105 driving face,long-distance water exploration boreholes were constructed in 92013 belt roadway,and the accumulated water in 91105 goaf was discharged.During the exploration of water,a total of 7 boreholes were constructed.The test results show that after using advanced water exploration drilling,the advance of 92105 driving face can be ensured to be 552 m,saving 46 d of construction period and 4.8×105 yuan of cost.