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通过沿综放工作面全长埋管布点测定的方法,对采空区气体进行监测,得出下沟煤矿ZF4403工作面采空区氧气分布,并推算出采空区漏风强度和浮煤厚度;再结合采空区自燃危险区域判定理论和下沟煤矿ZF4403工作面煤样自然发火实验测定的煤自燃极限参数,确定ZF4403工作面采空区自燃危险区域和工作面最小安全推进速度,从而为高瓦斯综放工作面的防灭火工作提供科学依据。
The gas in goaf area was monitored by measuring along the length of buried pipe in the fully mechanized caving face and the oxygen distribution in goaf of ZF4403 working face was obtained and the air leakage intensity and the thickness of floating coal in goaf were deduced. Combined with the judgment theory of spontaneous combustion danger zone of goaf and the coal spontaneous combustion limit parameter measured by coal spontaneous combustion experiment of ZF4403 working face in Xiagou coal mine, the minimum safe advance speed of spontaneous combustion danger zone and working face of ZF4403 working face is determined, Gas Comprehensive Working Face Fire Prevention and Control to provide a scientific basis.