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煤层瓦斯含量是进行矿井瓦斯防治和瓦斯资源评估的主要依据,对它的准确定位必须建立在弄清其控制因素的基础上。综合考虑了煤层瓦斯含量各方面的影响因素,从煤储层地质特征、煤储层物性特征、煤层瓦斯封盖特性3个方面进行分析。利用层次分析法将指标体系按照集中度分为目标层、约束层、准则层,构建出煤层瓦斯含量控制因素评价指标体系的多层次分析结构模型,并以焦坪矿区为例进行了验证。
Gas content in coal seam is the main basis for mine gas prevention and control and gas resource assessment. Its accurate positioning must be based on ascertaining its control factors. Comprehensively considering the influencing factors of various aspects of gas content in coal seams, the paper analyzes the geological characteristics of coal seams, the physical property of coal reservoirs and the characteristics of gas capping in coal seams. Analytic Hierarchy Process (AHP) is used to divide the index system into target layer, constraint layer and criterion layer according to concentration degree. A multi-layer analysis structural model of evaluation index system for gas content control factors of coal seam is established.