Disposal the Complex Situation of Outburst Elimination Drilling in Uncovering Coal in Crosscut
As a new gas control technology,uncovering coal in crosscut can prevent and control coal and gas outburst accidents from the source.However,drilling complications are easy to occur during construction.The correct disposal of drilling complications is related to the success or failure of drilling engineering.The hydrogeological conditions of Xieyi Mine in Huainan are complex,and the ground-assisted outburst elimination drilling is faced with the problems of accurate borehole trajectory control and avoiding obstacles during drilling.During the construction process,drilling fluid leakage and drilling tool washout occurred.Through measures such as cement paste plugging,cement sealing and sidetracking,a large amount of drilling fluid and formation water were successfully prevented from pouring into the lane.According to the tracer outflow time difference,the approximate location of drilling tool washout was determined,and the treatment measures of pulling out and replacing drilling tools were taken,which successfully avoided the occurrence of downhole drilling accidents.
gas controloutburst eliminating drillingdrilling fluid leakagedrilling tool washouttracerxieyi mine in Huainan
万方数据
维普
