Research And Application Of Downhole And Local Gas Drainage Technology

Borehole gas drainage is one of the regional and local measures to prevent coal and gas outburst.Coal mine gas drainage and gas utilization effectively,not only can eliminate harmful gas,improve the safety of mine production capacity,but also ensure that the safety of working personnel,strengthen environmental protection and increase the economic efficiency of enterprises.In this paper,taking the gas drainage as the project background,the method of extracting coal seam in the coal seam of the slope coal mine is used as the working face of the coal seam,which is used for the pre extraction of the parallel boreholes in the coal seam and the utilization of the gas drainage in the goaf of the gas tail roadway.It is difficult to solve the problem of gas disaster in coal mine by using this method.In order to solve the gas of Wan Po Mine Drainage rate is low,the effect of extraction and gas overrun problem,realize the high gas coal mine and the establishment of new technology system of zero limit gas control,through long-term practice and technology research,the implementation of local and large area gas in mine drainage by Wang slope,dense bedding drilling and drilling through pre pumping,high drilling and pipe drainage of goaf gas,plus improved ventilation mode can achieve zero limit.In order to solve the problems existing in the process of gas treatment of Wang Po mine,the coal mine is built into a typical model of gas control and demonstration.