The district ventilation system divides the whole mine into several independent ventilation systems. The main applicable conditions are: the ore body is moving towards a long mine; the geological conditions of the ore deposit are complex, the ore body distribution is disorderly or the ore body is structurally destroyed, and it is naturally divided into several areas. There are many intersections between the Dianhe and the old coffin, the goaf, the caving area and the surface, and the wind leakage is more serious, and the main transportation wells connecting the mining areas are few mines, which are easy to be closely separated; the ore or surrounding rock has The risk of spontaneous combustion requires a zone return to the wind or a mine that needs to be partitioned to provide disaster relief measures.
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