煤田地质与勘探2025，Vol.53Issue(10)：91-100,10.DOI:10.12363/issn.1001-1986.25.05.0385
典型中深埋煤层覆岩结构特征与风化基岩富水性研究
Structural characteristics of the overburden and water yield property of weathered bedrock aquifer in a representative medium-deep coal seam
王路 1华照来 1黄浩 2李增林 1任帅峰 1王嗣桐1
作者信息
- 1. 陕西陕煤曹家滩矿业有限公司,陕西榆林 719001
- 2. 中煤科工西安研究院(集团)有限公司,陕西西安 710077
- 折叠
摘要
Abstract
[Background]The weathered bedrock aquifer represents a major water-filled aquifer encountered during coal mining in the Jurassic coalfield in northern Shaanxi Province.Therefore,evaluating the water yield property of the weathered bedrock aquifer is the key to the prevention and control of water hazards in coal seam roofs.[Methods]This study investigated panel 12 of the Caojiatan Coal Mine,Shaanxi Province.Analysis of the stratigraphic and lithological structure types of the overburden of coal seam 2-2 identified the weathered bedrock as the primary overlying water-bear-ing aquifer of the coal seam.Using net-to-gross(NTG)ratio,sandstone thickness,weathering influence index,burial depth of weathered bedrock,specific yield,permeability coefficient,rock quality designation(RQD),and apparent res-istivity as evaluation indicators and based on the coupling of analytic hierarchy process(AHP),coefficient of variation(CV),and grey relational analysis(GRA),this study constructed a comprehensive AHP-CV-GRA evaluation model for the water yield property of the weathered bedrock aquifer.By calculating the weights and performing spatial overlay analysis for these indicators,this study predicted the zoning of the water yield property of the weathered bedrock aquifer.[Results and Conclusions]The water yield property of coal seam 2-2 can be categorized into three types:strong,moder-ate,and weak.The detection results of the anomaly areas of water yield property obtained using the transient electromag-netic method demonstrated that most of zones with strong water yield property in the study area corresponded to the low-resistance anomaly areas near the bottom boundary of the weathered bedrock.To further validate the evaluation results obtained using the AHP-CV-GRA model more accurately,the underground drainage volumes of mining face 122104 were adopted for validation.The results indicated that zones with large drainage volume featured strong water yield property,revealing a good agreement between the evaluation results and the actual conditions.Therefore,the proposed AHP-CV-GRA method enables the scientifically robust elevation of the water yield property of aquifers.关键词
中深埋煤层/覆岩结构/风化基岩含水层/富水性分区/层次分析/变异系数/灰色关联/陕北地区Key words
medium-deep coal seam/structure of the overburden/weathered bedrock aquifer/zoning of water yield property/analytic hierarchy process(AHP)/coefficient of variation(CV)/grey relational analysis(GRA)/northern Shaanxi分类
矿业与冶金引用本文复制引用
王路,华照来,黄浩,李增林,任帅峰,王嗣桐..典型中深埋煤层覆岩结构特征与风化基岩富水性研究[J].煤田地质与勘探,2025,53(10):91-100,10.
