An assessment of water yield properties for weathered bedrock zone in Northern Shaanxi Jurassic coalfield: a case study
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ORIGINAL PAPER
An assessment of water yield properties for weathered bedrock zone in Northern Shaanxi Jurassic coalfield: a case study in Jinjitan coal mine, Western China Zhi Yang 1 & Wenping Li 2 & Jianghui He 2 & Yu Liu 3 Received: 19 June 2017 / Accepted: 5 September 2019 # Saudi Society for Geosciences 2019
Abstract Jurassic weathered bedrock is widely distributed in the Jurassic coalfield of Northern Shaanxi Province. Its fracture network is connected with each other well, which provides a good space foundation for groundwater storage. It makes bedrock weathered zone become one of the important aquifers that endanger coal mine safe production. It is quite necessary to predict bedrock weathered zone aquifer water yield property scientifically to provide a technical guarantee for mine water inrush hazard prevention and control. In order to find out the characteristics of bedrock weathered zone aquifer water yield property, the 5 main control factors affecting weathered bedrock aquifer water yield property, characteristics of overlying aquifer, weathered bedrock strata age, lithologic composition feature, weathering intensity of bedrock, and bedrock weathered zone thickness, are selected to establish a water yield property index mathematical model on weathered bedrock aquifer by the fuzzy Delphi analytic hierarchy process (FDAHP) method and protracted water yield property partition map with the help of ArcGIS. Through analysis and comparison, established water yield property index model and partition map are feasible with a relative high accuracy. Meanwhile, it has some good directive significance to predict weathered bedrock aquifer water yield property type for surrounding mines with similar conditions. Keywords Weathered bedrock . Aquifer . Water yield property evaluation . FDAHP method·
Introduction With the large-scale exploitation of coal resources in China, mine water hazard caused by mines is becoming more and more serious. Especially in the arid and semi-arid areas of Responsible Editor: Abdullah M. Al-Amri * Wenping Li [email protected] Zhi Yang [email protected] 1
School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116,, Jiangsu, China
2
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116,, Jiangsu, China
3
State Key Laboratory of Mining-induced Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China
Northwest China, coal reserves are huge but there is a huge contradiction between mine drainage and ecological environment, industry, agriculture, and living water for residents. Quaternary phreatic aquifer water is not only a huge threat to safe mining but also typical of water supply significance and important ecological value (Zhang et al. 2010). Jurassic bedrock weathered zone is widespread in the Jurassic coalfield of Northern Shaanxi. Some scholars have studied that weathered bedrock can be used as an aquifuge, which h
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