Liu Yang, Qi Xuyao, Luo Dayong, Zhang Yongqing, Qin Jiangtao
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China.
School of Resources and Security, Chongqing Vocational Institute of Engineering, Chongqing 402260, China.
ACS Omega. 2023 Dec 8;8(50):47690-47700. doi: 10.1021/acsomega.3c05942. eCollection 2023 Dec 19.
Spontaneous combustion of coal gangue dumps not only releases toxic and harmful gases, polluting the environment, but also leads to explosion accidents and casualties due to improper handling. This paper focuses on delineating the fire area, constructing a comprehensive fire prevention and extinguishing system, and restoring the ecological environment. Infrared thermal imaging was used to detect the shallow fire area, while intensive drilling was conducted to detect the deep fire area. The stability of the coal gangue dump was enhanced by perfusing three-phase foam for cooling and using a curing material to fill the cracks. Land reclamation was then performed to restore the ecological environment. The results indicate that spontaneous combustion of coal gangue dumps can trigger the spread of the fire area from the outside to the inside, gradually expanding due to the 'stack effect'. The sources of spontaneous combustion in gangue fire areas are mainly located 3-5 m below the flat surface, and the shallow and deep fire areas are interconnected, posing a significant danger. These research findings can serve as a reference for detecting fire areas in coal gangue dumps and controlling environmental pollution.
煤矸石山自燃不仅会释放有毒有害气体，污染环境，还会因处理不当引发爆炸事故并造成人员伤亡。本文着重于划定火区范围，构建综合防火灭火系统，并恢复生态环境。利用红外热成像检测浅层火区，同时进行密集钻孔检测深层火区。通过灌注三相泡沫进行冷却并使用固化材料填充裂缝来增强煤矸石山的稳定性。随后进行土地复垦以恢复生态环境。结果表明，煤矸石山自燃会引发火区从外向内蔓延，由于“烟囱效应”而逐渐扩大。矸石山火区自燃源主要位于平面以下3 - 5米处，浅层和深层火区相互连通，存在重大危险。这些研究结果可为检测煤矸石山火区及控制环境污染提供参考。
