应用模糊综合评判原理评价安全煤柱的留设

勘探阶段如何定量评价在厚度较大的新生界下采煤时,如何确定留设安全煤柱的水文工程地质条件,目前尚无完善的方法。以新郑矿区煤田地质勘探获取的水文地质及工程地质资料为例,选取新生界底部含水层、隔水层、风化带、煤层上覆岩组的水文地质及工程地质特征及区域地应力状态五个指标,采用模糊综合评判方法,对矿区留设安全煤柱的水文地质及工程地质条件进行综合评价。评价结果表明:研究区安全煤柱留设条件的优良级得分为48分,中等级得分为33分,较差级得分为19分,表明该矿二1煤层留设安全煤柱的水文地质及工程条件较好。研究结果可为矿区留设安全煤柱提供参考。

Safety Pillar Setting Appraisal through Fuzzy Comprehensive Evaluation

How to appraise safety pillar setting hydrogeological, engineering geological conditions during coal mining under rather thick Cenozoic strata still have not perfect method at present. To take the hydrogeological and engineering geological data acquired from coal geological exploration in the Xinzheng mining area as example, five indices of Cenozoic Group bottom aquifer, aquifuge, weathering zone, coal seam overlying strata hydrogeological, engineering geological features and regional ground stress were selected to carry out comprehensive appraisal. The appraised result demonstrated that： study area safety pillar setting condition excellent grade scoring 48, medium grade 33 and relatively poor gradel9, indicated that the coal seam Ⅲ safety pillar setting hydrogeological and engineering geological conditions are rather good, the result can be a reference for mining area safety pillar setting.