Faculty of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing, China.
China Coal Research Institute, Beijing, China.
Environ Sci Pollut Res Int. 2020 Nov;27(31):38776-38787. doi: 10.1007/s11356-020-09847-1. Epub 2020 Jul 6.
Coal gangue hills are prone to spontaneous combustion, thereby polluting the environment of mining areas such as the soil, groundwater, and atmosphere, and the frequent occurrence of gangue hill collapses, landslides, explosions, and other accidents can even endanger the lives and property of residents. To realize the safety management of coal gangue spontaneous combustion and evaluate its present risks, this paper selects the Dongzhou Kiln gangue hill in Zuoyun County, Datong City, China, as the research object to conduct a risk assessment study. The Dongzhou gangue hill fire area is relatively large, with a total area of 183,039 m. Smoke emission commonly occurs at the site, and the surface temperature reaches 50 °C, while the CO concentration exceeds 10. A radon detection scheme for concealed fire zones verified with borehole temperature measurements is applied. The high-temperature area is delineated with relevant data obtained by infrared thermal imaging, radon concentration, and borehole temperature detection technologies, and a coal gangue spontaneous combustion risk assessment method is established, while the gas toxicity and explosion risks of the construction area and fire trends are analyzed. The research results indicate that there are 6 likely high-temperature regions in the test area, 4 high-toxicity areas in the drilling construction area, 1 area with a high explosion risk, and 3 areas with a high risk of spontaneous combustion. Among these areas, platform 2 is a high-risk area and needs to be carefully considered. The construction of the entire area is at high risk, including toxicity, gas explosion, and spontaneous combustion risks, and measures must be implemented to reduce the overall risk.
煤矸石山容易发生自燃，从而污染矿区的土壤、地下水和大气等环境，而且矸石山频繁发生崩塌、滑坡、爆炸等事故，甚至会危及居民的生命财产安全。为了实现煤矸石山自燃的安全管理和评估其当前风险，本文选择中国大同市左云县的东洲窑矸石山作为研究对象，进行风险评估研究。东洲窑矸石山火灾面积较大，总面积为 183039m²。该场地经常发生烟雾排放，表面温度达到 50°C，而 CO 浓度超过 10。应用钻孔温度测量验证的隐火区氡探测方案。利用红外热成像、氡浓度和钻孔温度检测技术获得的相关数据，划定高温区，并建立煤矸石山自燃风险评估方法，同时分析施工区的气体毒性和爆炸风险以及火灾趋势。研究结果表明，试验区内有 6 个可能的高温区，钻孔施工区有 4 个高毒性区，有 1 个高爆炸风险区，有 3 个高自燃风险区。其中，2 号平台为高风险区，需慎重考虑。整个区域的建设存在高风险，包括毒性、气体爆炸和自燃风险，必须采取措施降低整体风险。
