Classification and comprehensive management technology of coal spontaneous combustion hazardous areas in the remining face
In response to the coal spontaneous combustion accident in the F1301 remining face of Yunhe Coal Mine,based on the actual situation of F1301 mining face,the hidden dangers of coal spontaneous combustion in the working face were analyzed.Based on the gas sample data from the intake and return air way drilling,the risk level of coal spontaneous combustion in the goaf on both sides of the working face roadway is divided into three levels:high risk,general risk,and low risk,a fire prevention and monitoring system and comprehensive treatment technology were proposed and applied in practical engineering.The application results show that,the overall CO concentration in each observation borehole shows a fluctuating and decreasing trend,ultimately stabilizing below 0.024‰.This effectively suppresses the oxidation process of residual coal in the goaf,eliminates the hidden danger of coal spontaneous combustion in the adjacent 1301 and 1302 goafs during the mining process of F1301 working face,and is conducive to ensuring the smooth subsequent mining of F1301 working face.
coal spontaneous combustionmine fire prevention and extinguishingclassification of spontaneous combustion hazard zonegovernance technology
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