Method for dividing degree of influence of fire area on coal seam

The invention provides a coal seam fire area influence degree division method. The method comprises the steps that the minimum distance D between a mining coal seam and a fire area is determined; calculating the height Hm of a caving zone of a roof of the mined coal seam; calculating the height Hli of the fissure zone of the roof of the mined coal seam; calculating the safety thickness T of the coal rock pillar for preventing collapse of the coal rock layer after mining; according to the obtained values of D, Hm, Hli and T, dividing the threat level of the ignition area suffered by the mining coal seam; when Dgt; when T is greater than T, judging that the threat level of the ignition area suffered by the mining coal seam is level III; when Hilt is greater than Hilt; when D is less than or equal to T, judging that the threat level of the ignition area suffered by the mining coal seam is II level; when Hmlt; when D is less than or equal to Hli, judging that the threat level of the ignition area suffered by the