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煤层开采引起的地表沉陷能够产生与采空区贯通的裂缝,导致地面向采空区漏风,会引发采空区遗煤自燃。根据元堡煤矿9号煤层埋深浅、采用综采放顶煤技术、易自燃等特点,分析了地表沉陷初期漏风对采空区遗煤自燃的影响,通过对进、回风巷风量对比证实了地表漏风的存在,采取地表填土掩埋裂缝的措施,有效地解决了地表漏风的问题。
Surface subsidence caused by coal seam mining can lead to cracks penetrating through the goaf, resulting in air leakage to the goaf and the spontaneous combustion of coal left by the goaf. According to the shallow depth of No.9 coal seam in Yuanbao Coal Mine, using the technology of fully mechanized top coal caving and spontaneous combustion, the influence of air leakage on the spontaneous combustion of coal left in the goaf during the initial period of surface subsidence was analyzed. Comparing the air volume between inlet and return airways, Surface air leakage, the use of surface fills the cracks buried measures to effectively solve the problem of surface air leakage.