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为解决高瓦斯易自燃煤层生产过程中瓦斯与煤自燃复合灾害的重大隐患,在研究付村煤矿瓦斯异常区的瓦斯赋存规律与煤自燃发火特点的基础上,建立了“W”型通风方式条件下交错钻场高位钻孔抽放、旁路式倾向高位钻孔抽放、邻近采空区钻孔抽放等立体瓦斯抽放体系;提出了采用三相泡沫对采空区浮煤覆盖、不燃高倍数固化泡沫对漏风地点迅速封堵、易自燃区域目标注氮惰化、支架后面注塑性水玻璃凝胶堵漏降温等“注-堵”成套防灭火关键技术。针对抽放瓦斯过程易引发煤自燃的特点,提出了旁路式高位钻孔抽放瓦斯并结合瓦斯抽放钻孔大流量灌注三相泡沫防灭火材料的“抽-注”一体化方法同时治理采空区瓦斯与煤自燃技术。上述关键技术在付村矿3下煤层综放面瓦斯和煤自燃防治中得到成功应用,应用效果显著,在有效解决工作面瓦斯的同时很好地解决了采空区煤自燃危险性,具有广泛的推广应用前景。
In order to solve the serious hidden danger of gas and coal spontaneous combustion in the process of producing gas with high gassy and spontaneous combustion, based on studying the gas occurrence law and spontaneous combustion characteristics of coal spontaneous combustion in Fucai coal mine anomalous zone, the “W” type Ventilation mode under staggered drilling rig high borehole drainage, bypass prone high borehole drainage, adjacent to the mined-out gas drainage and other three-dimensional gas drainage system; proposed the use of three-phase foam on the goaf floating coal Coverage, non-combustible high-fold foam quickly sealed the location of leakage, easy to spontaneous combustion zone injection nitrogen inerting, behind the stent injection of water glass gel plugging cooling and other “Note - plug ” complete set of fire-prevention key technologies. In view of the characteristics of spontaneous combustion of coal which can cause spontaneous combustion in the process of gas drainage, a “pumping - injection” integration method of bypassing high-level drilling drainage methane combined with gas drainage drilling large-flow perfusion three-phase foam fire-extinguishing material Simultaneous management of goaf gas and coal spontaneous combustion technology. The above key technologies have been successfully applied in the prevention and control of gas and coal spontaneous combustion in the fully mechanized top-coal caving face of the No. 3 coal seam in Fucun Mine, and the application effect is remarkable. The gas in the working face is effectively solved and the danger of spontaneous combustion of coal in the goaf is well solved, The promotion of application prospects.