Abstract: To research the pressure bump dangerous level in deep mining area of No. 3 Hongyang coal mine, the influence factors were analyzed and ascertained according to the actual geological and production conditions of the mining area. The mining depth and the remaining coal pillar of 7# overlying coal seam are regarded as the key influence factors. The impact hazard index of divided mesh in mining area was calculated with comprehensive index method. According to the calculation result, the comprehensive index of geological influence factors is 0.65 which indicated moderate impact risk, and the maximum impact index of influence factors of mining condition is 0.83 which indicates strong impact risk. The impact hazard areas of the mining area is divided, and the areas influenced by key factors and igneous rock wall are at strong impact risk.

Key words: Deep mining area, pressure bump, comprehensive index method, division of hazardous areas