Abstract:
In order to solve the problem of difficult determination of spontaneous combustion zone due to serious air leakage in fully mechanized mining face for large mining height of shallow coal seam, N1201 fully mechanized mining face in Ningtiaota Coal Mine was taken the example. The spontaneous combustion danger region in fully mechanized mining face for large mining height of shallow coal seam was comprehensively analyzed by using the similar simulation experiment of mining fissure, the detection technique of SF
6 gas leakage channel, beam tube monitoring technology on the both sides of the goaf and Fluent numerical simulation. The results showed that because of serious air leakage, the goaf belonged to the spontaneous combustion danger region, and its distance far from the working face was from 5 to 500 meters, especially two crossheadings had the greater spontaneous combustion risk. Meanwhile, the validity of determining spontaneous combustion danger region in the goaf of fully mechanized mining face in shallow coal seam was proved by adopting the combination of a variety of monitoring technologies.