Research On Fire Prevention Technology Of Working Face Under Small Coal Pit Fire Area

Spontaneous combustion of coal burning is an objective phenomenon in natural disaster, which is also one of the most serious disasters in coal mine. The spontaneous combustion of residual coal is caused by air leakage in the goaf. According to relevant statistics, more than ninety percent of fires in coal mine are caused by spontaneous combustion of small coal pit. According to relevant data, abandoned small coal spontaneous combustion of residual coal in goaf of mine fire caused fire accounted for more than90%. To solve the problem of mine fire prevention, management of small coal spontaneous combustion fire became the focus in the coal mine safety production. Aiming at the characteristics of Xiqu Coal Mine of Xishan coal electricity Limited by Share Ltd overlying coal mine goaf on fire, put forward comprehensive prevention technology project of fire with fire information detection technique.The related theories in the theoretical research of infrared thermography and air leakage detection technology are studied In Xiqu Coal Mine No.29210working face in the goaf during overburden small coal fire information detection process. In the aspect of experimental analysis, the Xiqu Coal Mine8coal and9coal spontaneous combustion tendency and spontaneous ignition temperature are worked out through the crossing point temperature experiment of coal. At the scene detection, the leakage channel with the temperature abnormal area that leads to spontaneous combustion is found out by releasing and analyzing tracer gas in Xiqu Coal Mine No29210working face. Comparing with monitoring and analysis of infrared thermography on the observation of internal heat source temperature and surface temperature, the existence of hidden fire is found, calculating the inversion formula of the small coal pit distance. Finally, aiming at the region of spontaneous combustion, there is a series of corresponding measures for the Xiqu coal mine that arc made, which further provides a reliable basis for fire prevention design.