Regional Coal Self-ignition Detection And Governance And Overall Control Technology For Mining Under Complex Goaf

For the study of mining area coal spontaneous combustion detection under complicated cavity governance and the overall prevention and control,thesis firstly induced mechanism of coal spontaneous combustion is analyzed by theory, development process and different influencing factors, and combined with the special environment of mining under the complicated cavity analyzed under the mining of coal spontaneous combustion characteristics and combustion possibility level in large area, and then North progenitormine as a case study. Using small coal spontaneous combustion experiment method of its temperature programmed4#,9#coal seam, the experiments of coal sample is obtained through the air with the coal temperature under the condition of low temperature stage release the gas composition and concentration of coal samples, it is concluded that applies to general situation of index gases, and combining the theory of coal spontaneous combustion phase transition based on the index gases of coal spontaneous combustion early warning system. According to the North progenitormine’s condition on site, by the method of tracer gas,air leakage remit9209lane was determined, on the basis of the index of gas inside the roadway fixed-point sampling to be the result of spontaneous combustion status early warning, the application of infrared thermal imager on roadway surface temperature monitoring, and then adopt air leakage section of the roadway surface spray and regional equalizing, old grouting plugging technique, etc. FLACE3D numerical simulation method is used to protect, to simulate the damage status of coal pillar mining, and then based on this, advances working face design, spontaneous combustion monitoring and forecast of coal spontaneous combustion prevention to develop the mining face layout, the prevention and control of the automatic control of positive pressure ventilation CO gas and a set of working face of coal spontaneous combustion prevention and control plan.