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结合阜康矿区东部10个煤层气区块的优选工作,提出采用层次分析法确定各级指标的相对重要性,该方法首先在构建评价指标体系的基础上,综合考虑煤层气地质条件的模糊性和确定性双重特征以及可采区块的经济环境特征,遵循从定性研究→定量排序→重点地质分析的思路.其次采用“关键要素递阶优选”与“优选目标定量排序”两种方法并行,前者通过地质分析,筛选出对不同层次评价单元煤层气前景具有关键性控制作用的影响要素,进而按评价区→有利区→靶区的递进模式进行选区评价优选;后者在对地质、经济、环境等影响因素的综合考察的基础上,根据井田区块的实际情况定性赋分,依据权重计算取得排序,进而确定各靶区的优选评价等级.最终确定的有利开采区块为4个,分别为泉水沟煤矿、大黄山一号井、西沟二号井及西沟一号井的矿井范围.野外工作验证与层次分析法的优选结果具有较高的一致性,结果表明:该评价指标体系较好地指导了实际井田区块优选工作.1
Combining with the optimization work of 10 coalbed methane blocks in the east of Fukang Mining Area, the analytic hierarchy process (AHP) method is proposed to determine the relative importance of the indexes at all levels. Based on the construction of evaluation index system, the method first considers the fuzziness of coalbed methane geological conditions And deterministic dual characteristics and the economic environment characteristics of recoverable blocks follow the idea of qualitative research → quantitative sorting → key geological analysis.Secondly, using the “key element rank optimization” and the “preferred target quantitative ranking” In the former, through geological analysis, the influencing factors of key control over coalbed methane of different levels of evaluation unit are screened out, and then the selection of evaluation area is carried out according to the progressive pattern of evaluation area → favorable area → target area; On the basis of the comprehensive investigation of the influencing factors such as geology, economy and environment, according to the actual situation of Itaqua, qualitative ranking is obtained and the rankings are obtained according to the weight to determine the preferred evaluation level of each target area. For the four, respectively, the spring ditch coal mine, a large well Huangshan, Xigou two wells and the number of well Xigou mine field test. AHP preferred result of high consistency, results show that: the evaluation system to better guide the actual work of Ida block preferably .1