Analysis Of The Gob's Gas Emission Methodsof The Newly Developeed Area Of Huai Nan Coal Mine

The gob's gas emission of the is extremely essential in the coal mine gas treatment. It is relating with controling gas density and enhancing the air quality of the coal face, preventing spontaneous combustion of the gob's coal and enhancing availability of gas in the entire mine ect. Therefore, researching of gas emission of the gob has the very important function and significance in reducing the gas density and enhancing the air quality of the coal face, reducing the expense of the ventilation, preventing the coal spontaneous combustion and enhancing availability of gas ect.The circle of "O" form, the beam of built body and the theory of the transfusion are quoted to research the mechanism of the fire—damp migration in the gob and the essential methods of the gob's gas emission are detailedlly elaborated in the article. The distribution situation of the gob's gas will be easily understanded by quoted the isoconcentration field in researching the theory of the fire-damp migration in the gob. The article analyzed the gob's gas emission methods of the newly developed area of Huai Nan coal mine through the gas emission situation of 1115(3) fully mechanized coal face of Zhangji coal mine. The highly collection tunnel and high location drilling field were elaborated in detail. Specially, the aspects was optimized about being determined the position of in the plane and the space of the roof way of gas emission, the spacing of high drilling field and the arrangement situation of roof borehole.The mathematical models were established about the relations of emissed gas quantity of the gob and ventilated gas quantity of the coal face in the article final. And the model was confirmated by the project example. The forecasts of the gob's gas emission of the coal mine was made.