The exploration of methane occurrence law of 3 coalbed in Shimengou mine

Coal seam gas content is one of the main parameters of coal seam,which is the important basis for the forecast of mine gas emission,coal and gas outburst,and design of gas drainage.There will be a pointed governing measure on digging face and mind face,only by finding out the methane occurrence law in order to avoid the blindness of Shimengou mine gas governs.The author analysises relations between the gas content of coal seam and burial depth,and combines the geological structure of the mine,study coal bed gas tax.The paper draws that coal seam gas content tax is controlled by the geological structure,when far away from the geological structure area,the content of gas is correlated with burying depth and put out the relational expression,which offers the reliable data for the mine gas controling.