煤自燃与瓦斯共生灾害演化与预警

    Coal spontaneous combustion and gas symbiotic disasters evolution and early warning

    • 摘要: 煤自燃与瓦斯共生灾害预防和控制已成为煤矿亟待解决的重要课题。为了探讨共生灾害的耦合特征及致灾机理,采用数值模拟等方法研究共生灾害的演化过程,并建立了共生灾害的预警和防治体系架构。结果表明:共生灾害是基于多场时空耦合交织产生的灾害,通风量增加,采空区内漏风量增加,灾害区域向采空区中深部移动;相比“U”型通风系统,“Y”型通风系统可有效防止上隅角瓦斯积聚,灾害区域向采空区中深部移动;基于气体体积分数和温度建立了共生灾害预警模型,并从控瓦斯、控时间、控氧气、控温度等方面提出共生灾害协同防控体系,构建了智能化的共生灾害监控系统框架。

       

      Abstract: Coal spontaneous combustion and gas symbiosis disaster prevention and control has become an important issue to be solved urgently in coal mines. In order to explore the coupling characteristics and disaster-causing mechanism of symbiotic disasters, the evolution process of symbiotic disasters was studied by methods such as numerical simulation, and the early warning and prevention system framework of symbiotic disasters was established. The results show that the symbiotic disasters are based on the interweaving of multi-field time-space coupling, the ventilation volume increases, the air leakage in the goaf increases, and the disaster area moves to the middle and deep parts of the goaf; compared with the U-shaped ventilation system, the Y-shaped ventilation system can be effectively prevent gas accumulation in the upper corner, and the disaster area moves to the middle and deep parts of the goaf. Based on gas concentration and temperature, the symbiotic disasters early warning model is established, and a symbiotic disasters collaborative prevention and control system is proposed from the aspects of gas control, time control, oxygen control, and temperature control, etc., and an intelligent symbiotic disaster monitoring system framework is constructed.

       

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