煤炭地下气化地质选区指标体系构建及有利区评价技术

为厘清影响煤炭地下气化的地质因素，构建科学的地质指标评价体系，对影响煤炭地下气化的七大类地质条件、41个次级地质指标进行了系统分析和分级量化，建立了地质选区指标体系；根据对选区的重要程度，将各地质指标分为基本地质指标（A）和关键地质指标（B）两类，基于这两大类指标，提出了两种新的煤炭地下气化有利区定量评价方法，精细型（A+B）和通用型（B）；利用专家打分法和层次分析法确定了这两种评价方法中所涉及到的地质指标权重；依据资源、开采技术、区域构造和环境四大类条件，厘定了评价结果的定性分级方案；综合定量评价和定性分级，提出了有利区优选的一般步骤，最终形成了一套完整的煤炭地下气化有利区评价技术体系.该评价技术体系的有效应用，可为煤炭地下气化科学选址和产业化进程推进提供重要理论支撑. 

Construction of Geological Selection Index System and Evaluation Technology of Favorable Area for Underground Coal Gasification

In order to clarify the geological factors affecting underground coal gasification (UCG) and construct a scientific and quantitative geological index evaluation system, seven types of geological conditions and 41 geological indexes affecting UCG are systematically analyzed, graded and quantified, and then the geological selection index system is established in the paper. According to the importance of the selected area, each geological index is divided into two categories: basic geological index (A) and key geological index (B). Based on these two categories of indexes, two new quantitative evaluation methods for favorable areas of UCG are proposed, namely fine type (A+B) and general type (B). The weight of geological indexes involved in the two evaluation methods is determined using expert scoring method and analytic hierarchy process (AHP). According to the conditions of resources, mining technology, regional structure and environment, the qualitative classification scheme of evaluation results is determined, and the general steps of favorable area optimization are put forward by comprehensive quantitative evaluation and qualitative classification. Finally, a complete set of evaluation technical system for favorable areas of UCG is formed. The effective application of the evaluation technology system can provide important theoretical support for the scientific site selection and industrialization process of UCG.