Study On Comprehensive Treatment Technique For Outcrop Coal Fire Of 4# Coal Seam In Bozidun Mine

Under natural conditions, outcrop coal can cause spontaneous combustion of coalfield because of oxygen and assembling heat, and spontaneous combustion of coal seam is continuously expanding into the deep areas and forms large area coalfield fire, which is one of the major natural disasters people faced. Spontaneous combustion of coal seam seriously restricts the realization of high production and high efficiency, safety production and scientific development of coal mine, and caused by serious resource waste, environmental pollution, casualties and property loss.As a sub-project of"The Comprehensive Treatment of Coalfield Fire", basing on the present research of causes and mechanism of spontaneous combustion of coal, this paper closely focus on the actual situation of 4# coal seam in Bozidun mine in Wensu and studies on treatment technique of spontaneous combustion of coal seam for outcrop coal. Firstly, according to the influence factors of spontaneous combustion, this paper analyses the causes and influence factors of spontaneous combustion about outcrop coal. Secondly, the paper discusses the treatment technique of spontaneous combustion about outcrop coal and brings forward gel fire extinguishing technique aiming at outcrop fire of 4# coal seam in Bozidun mine, as well as analyses the characteristics of colloid material and the process of infuse colloid system and choose a process according with the actual fire situation. Thirdly, the paper studies the treatment technique of outcrop fire, thus, measuring radon method is applied to fire source probing of fire area. Fourthly, the paper studies the rapid expansion bond and flexible solidification technique of dry powder sealing material. The result show that this technique can effectively seal the rock cranny and avoid the work of explosive dust stripping of hard rocks and loess covering. Fifthly, using the comprehensive treatment technique, we made a successful treatment on outcrop fire of 4# coal seam in Bozidun mine, this has an important action for eliminating spontaneous combustion fire and restoring safety production of the working face.In summary, the research of radon measuring technique and gel fire prevention and control technique has some reference significance for the comprehensive treatment technique of outcrop fire.