煤炭地下气化地质可行性和工艺适用性研究现状与进展

煤炭地下气化技术(UCG)是一种潜在的煤炭利用新方法，对于缓解我国能源危机，保障国家能源安全，实现碳达峰碳中和的“双碳”目标具有重大意义，其探索研究一直受到世界各国的重视。针对UCG资源条件的适宜性、工艺技术的可行性、环境影响的可控性3个方面，综述了煤炭地下气化技术的发展现状，阐明了适合UCG技术的煤炭资源储量情况、地质选区选址技术的不同标准、气化工艺的发展历程与适用条件、影响气化实施的工程与环境因素。分析认为，UCG的地质选区技术多为定性分析特定地质条件下的有利区，缺乏定量化的指标体系和方法，并且主要针对浅部和中部煤层，评价体系有待完善，特别是多煤层地区和深部煤层的开发；环境因素对于UCG产业化发展的影响越来越大，将是未来研究的主要方向之一。 

A review:Geological feasibility and technological applicability of underground coal gasification

Underground coal gasification (UCG) is a potential new method of coal utilization, which is of great significance for alleviating China’s energy crisis, ensuring national energy security, and achieving carbon peaking and carbon neutrality goals. It has always been valued by countries all over the world. On the suitability of UCG resource conditions, the feasibility of process and technology, and the controllability of environmental impact, this paper summarizes the development status of UCG technology, and clarifies the coal resource reserves suitable for UCG technology, different standards of geological area selection and location selection technology, the development history and applicable conditions of the gasification process, engineering and environmental factors affecting the implementation of gasification. According to the analysis, UCG’s geological area selection technology is mainly the qualitative analysis of favorable areas under specific geological conditions, lacking quantitative index systems and methods, which is mainly for shallow and middle coal seams. And the evaluation system needs to be improved, especially for the development of areas with multiple coal seams and deep coal seams. The influence of environmental factors on the development of UCG industrialization is increasing, which will be one of the main directions of future research.