Rapid Positioning and Controlling for Spontaneous Combustion Zone in Close Distance Coal Seams of Renlou Mine Ⅱ₁ Mining Area

The article analyzes the characteristics and control difficulties of fire area in Renlou Mine Ⅱ₁ mining area, shrink exclusion method is used to quickly locate areas of spontaneous combustion Renlou Mine Ⅱ₁ mining area; and the coal pillar around 8₂17 oblique transport roadway is determined as the spontaneous combustion zone. Combined with the actual situation of the mining area, the method of "point-line management" and "surface-type prevention" is proposed, the spontaneous combustion zone is controlled by three phases of "extinguishing", "controlling " and "preventing". Based on the "fixed-point grouting technology", "sealed surrounding rock fracture technology" and sealing technology of "film type", the new fire fighting system is formed, which is applied successfully in Renlou Mine Ⅱ₁ mining area.