全断面快速灌浆法在采空区防灭火中的应用

Application of Full Section Fast Grouting Method in Fire Prevention and Control of Goaf

摘要: 为防止不连沟煤矿在开采时采空区遗煤发生自燃，本文提出一种快速灌浆法可以有效地弥补采空区注氮、喷洒阻化剂、地面塌陷区回填等常规防灭火方法的不足。该方法首先通过漏风、遗煤分布及采空区氧气浓度判断发火范围，之后通过相邻巷道向采空区打设钻孔，通过钻孔向火区大量注入具有膨胀性防灭火材料覆盖遗煤区域，对氧化遗煤进行隔氧冷却。最终，工作面气体及采空区遗煤氧化得到很好地控制，工作面安全回采或安全回撤。

Abstract: In order to prevent spontaneous combustion of leftover coal in goaf during mining in Buliangou Coal Mine, in this paper, a fast grouting method can effectively make up for the shortage of conventional fire prevention and extinguishing methods, such as nitrogen injection in goaf, spraying inhibitor and backfilling in ground subsidence area. In this method, the ignition range is first determined by air leakage, residual coal distribution and oxygen concentration in goaf. Then, a borehole is drilled into the goaf through an adjacent roadway, through which a large amount of expandable fire-fighting materials are injected into the fire area to cover the residual coal area, and oxygen isolation cooling is carried out on the residual oxidized coal. Finally, the gas and coal oxidation in the working face and goaf are well controlled, and the working face can be safely mined or withdrawn.