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| Application practice of fire-proof closed wall technology in deep mine goaf |
| Hu Chaohui |
| Xingdong Mine, Jizhong Energy Resources Group Co.,Ltd., Xingtai 045000, China |
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Abstract Taking No.1127 Face of Xingdong Coal Mine as the engineering background, according to the spontaneous combustion characteristics of goaf in No.1127 Face, the goaf is blocked by filling sealing wall with expansive material through reasonable proportioning of expansive material. Practice shows that the sealing effect of the closed wall is good, which improves the tightness of the mined-out area, effectively reduces the air leakage in the mined-out area, eliminates the major hidden dangers of “ one ventilation, three preventions” in Xingdong Coal Mine, and ensures the safe production of the mine. It provides reference for the sealing of the mined-out area in other working faces of the mine.
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