| With the fully mechanized coal caving mining technique of growing maturity, greatly improving the production efficiency, and creating a good social and economic benefits, Therefore it have enjoyed rapid development in the country. But the phenomena of spontaneous combustion of residual coal is Serious in coaf of top coal caving mining face. increase the mining height, it make Leakage increased intensity in the coaf,the ventilation difficult to manage in the face, so it cause spontaneous combustion of residual coal in coaf, and impact of the mine production safety.This paper analyses the study on the mechanism of spontaneous combustion of coal, gob process and spontaneous combustion of residual coal "three zones" and the significance. Use of simulation of coal pyrolysis test system with the design and development of mine own, experimental study conducted for coal sample of 14254 light caving coal face in goaf in Xiaozhun Mine of FengfengGroup. Drawing the figs of various gas concentration with the change in temperature, identified signs of gas of spontaneous combustion of residual coal of light caving coal face in Goaf.it provide a basis that the prevention of spontaneous combustion of coal.Use of the gap dielectric fluid mechanics principles, analyzed resistance characteristics of the dynamic for light caving coal face in goaf, The goaf as continuous porous media, thereby establishing gob gas flow differential equations, find a gob Drag changes in the distribution of the trend. According to the graph theory of computer knowledge, goaf will flow as the air flow filtration, establish ventilation network model,and establish a mathematical model to solution the ventilation network, and preparation procedures for numerical simulation Solution.obtained the leakage wind speed of Filter Flow entilation network nodes in goaf,Use of mapping software to charte distribution of spontaneous combustion of residual coal "three zones" in goaf.Against the situation of spontaneous combustion of residual coal of 14254 light caving coal face in goaf in Xiaozhun Mine, we proposed prevention and control measures of Rationaland effective,and guarantee the safe and efficient production in mine. |
