Study On Symbiotic Disasters Of Gas And Spontaneous Combustion Of Coal In The Gob Area By Mining

With the development of coal mining to the deep, gas emission increases, spontaneouscombustion of coal is also serious increasingly, gas and spontaneous combustion symbioticdisasters are increasing. To solve this problem, using the material derivative to study gas and coalspontaneous combustion, analyzes gas emission and transport conditions of three zones in the gobused the similar simulation experiments and Fluent numerical simulation in the chamber and theexperimental data was analyzed by Origin software. Studied the affect between characteristics andpermeability and porosity in the gob and gas flow and spontaneous combustion of coal, the role ofBleeder system and Bleederless system played in prevention and treatment of spontaneouscombustion of coal and gas, as well as changes of temperature in the mined area when thepermeability increases100times in two ventilation systems. Through the research, get theinteraction between gas and spontaneous combustion of coal in the mined-out area, high gasemission inhibit the spontaneous combustion of coal, while spontaneous combustion of coal in themined out area will also affect gas migration, mastered the situation of gas emission, transport anddistribution in different regions of the gob area under different temperatures, increasedpermeability of the gob area has a greater impact to the Bleederless system and provided aguarantee to the further prevention of gas and spontaneous combustion of coal.