Practice And Research Of Gas Management Methods Of Huachu Coal Mine

With the increasing of the mining depth, gas emission in the coal mine, the danger of coal and gas outburst and the number of high gassy and outburst mines have been increased, which reasult in many gas suffocation, gas explosion and coal and gas outburst accidents in the production process of coal enterprises. At present, the total gas emission in the key mines has risen to 5400Mm3/a. So much gas gush out in the coal mining process, not only bring serious threats to the Safety production, lead to gas accidents, cause property loss and personnel casualties, but also increase the workload and economic burdenthe of coal enterprises, reduce the economic benefits, particularly in the mine with low air permeability and high gas, coal and gas outburst has been one of the most serious natural disasters which threat to the coal mine's safety production.The main task of this paper is to solve the issues in the gas drainage technology under the conditions of single seam and low permeability. And the technology has been applied to practice, which make the productions safty and efficient. In this paper, the gas drainage situation at home and abroad has been analysised, the appropriate method to our country has been recommended, and the problems existing in the gas drainage has been summarized. Through the research and practice, the occurrence condition and migration regularity of the gas in the coal seam has been mastered, and the present situation of gas drainage in Huachu coal mine has been discussesed. As a focous , the technology of gas drainage in Huachu has been reaserched. Also, the coalbed gas integrated management method has been Introduced, the best application of gas drainage technology in certain conditions has been analyzed, the negative pressure drainage borehole second hole sealing technology has been put foward, and obtained a better effect in the practice. Which laid a foundation for the gas drainage in future.