Analysis of Temperature Variation of E1302 Paste Filling Mining Working Face in Gaohe Mine
In order to ensure the safe and efficient mining of paste filling working face,the E1302 working face of Gaohe Mine was taken as the research object.Combined with the technical means of test,simulation analysis and field measurement,the temperature change of goaf and the spontaneous combustion of the lower coal seam during the production of mining face were analyzed.The results showed that the E1302 working face released heat during the solidification of paste,which led to the increase of temperature in the lower coal seam and the mining face,and the increase of temperature will increase the risk of spontaneous ignition in the lower coal seam,but the residual coal in the paste filling goaf lacked the condition of continuous spontaneous combustion oxidation,thus reducing the risk of spontaneous ignition in the goaf.During the mining of E1302 paste filling working face,the CO volume fraction in the mining face and at the return air outlet was within the safe range,which indicated that the paste filling materials used on site can meet the need of spontaneous ignition prevention in the goaf of the mining face.
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