| Gas is a product of geological processes. The conditions of creation, migration and preservation of gas are controlled by synthetical geologic function. The current coal seam gas occurrence is the result of coal seam with complex geological history evolution.Firstly, this paper using regional geological-tectonic evolution theory, gas occurrence tectonic level control theory, combined with TunLiu coal gas content and gas pressure data, using the method of mine gas geology, the study of geological evolution of the control effect (mine gas, System is studied and analyzed the characteristics and its collapse column of gas, TunLiu mine gas analysis, forecast the occurrence of mine gas content and coal and gas outburst dangerous area.TunLiu coal mine, coal for high and low permeability, has certain outburst dangerous. As to the deep roadway and the increase of mining depth, the gas content and gradually increase the amount adding 5m3 / min, rely on more ventilation is difficult to solve problems, must undertake gas and coal seam gas drainage, but the coefficient of permeability less than 0.1(m2/MPa2·d), 100 meters gas emitted from natural less than 0.1 m3 / min, therefore, TunLiu coal mine drainage is difficult.This paper studies the purpose is to find a kind of efficient lies in the actual production of low permeability of feasible coal permeability gas drainage, thus improving the rate of new methods. Based on the investigation of the information at home and abroad, a kind of new drilling method of crack - controlled blasting cutting pulse loading method.The results of gas pressure, flow parameters determination and comparison proved using controlling blasting technique, make the coal gas flow-volume greatly improve the technology and low dialyzing coal bed, improve the gas drainage under suction.
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