Study Of Yushe Coal Gas Deposit Law And Drainage Technology

The thesis is aimed at the problems of thin coal seam Gas Drainage, Yushe mine as the research object, by studying the mine gas geological data, coal seam gas emission, etc., analysis of the three-dimensional gas migration law of the mine gob tilt direction, haed direction and normal direction, master of the gas deposit law of the mine. Based on the gob gas deposit "O" ring theory, by the gob respectively construct 4 different angles drilling hole to faces gob, the research obtained the maximum height of gob caving zone between the 6 ~ 12m, the maximum height of fractured zone is about 30m; On this basis, established the gas emission law model of the mine to be more accurate prediction of gas emission rules for the mine.Finally, the paper researches the gas occurrence, migration and emission law of the gas drainage system of the NZ-702 face, by comparing the three methods of the bedding drainage, drainage crossing and wear layer combined with cis drainage holes, determined the mine based integrated gas drainage system, through the drainage rate, drainage volume forecast, this method can meet the needs of mine safety.