Analysis of Law of Coal Seam Gas Occurrence and Coal and Gas Outburst Risk Assessment of Mayixi No.1 Mine

Mayixi No.1 Mine is under construction and lack of gas data, by analyzing measured gas content of coal sample that collecting during the geological exploration, obtain the essential feature of mine gas occurrence. Through regression statistics analysis of depth of burial, elevation and gas content,obtain the law of the coal seam gas occurrence. Back calculation gas pressure with Langmuir formula,then assess the risk of coal and gas outburst of opening coal point of air-return shaft by using comprehensive indexes.