淮南谢二矿是煤和沼气突出的高沼气矿井。矿井可采煤层总厚度为30.07m,煤层走向北西,倾向东北,倾角一般为18至25度。由于井田走向短,加上受地质条件的限制,矿井经常处于多水平、多区段、多煤层、多工作面同时开采状态,开采强度大,工作面搬家频繁,通风系统复杂、多变。可采煤层均有自然发火危险,发火期一般为2～6个月,煤尘具有强烈的爆炸性,爆炸指 Huainan Xie 2 mine is a prominent high methane and biogas gas wells. The total thickness of mineable coal seams is 30.07m. The coal seam goes northwest and tends to the northeast. The dip angle is generally 18-25 degrees. Due to the shortening of the mine field and the restriction of geological conditions, the mine is often in a multi-level, multi-section, multi-coal seam and multiple face simultaneously mining conditions, mining strength, face moving frequently, the ventilation system is complex and changeable. The coal seam can have natural fire risk, the firing period is generally 2 to 6 months, coal dust has a strong explosive, explosive means