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Height of overlying strata failure zone under different hydrogeological units

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Abstract

The water flowing fractured zone height (WFFZH) is critical for the safe exploitation of coal resources and environmental protection, especially in arid and semiarid mining areas. Most existing studies focus on the WFFZH in bedrock, without considering the effect of the soil layer. This paper uses in situ data from a Jurassic coalfield the Yu-Shen-Fu mining area in Shaanxi province, China, to investigate the WFFZH for different hydrogeological units. Thirteen hydrogeological units, which were simplified into 4 hydrogeological associations, were used in this study to develop the inhibition coefficient and promotion coefficient of the soil layer and to determine the quantitative relationship between the soil-bedrock ratio and the inhibition (promotion) coefficient. This information was used to develop a comprehensive prediction method for WFFZH under complex hydrogeological structures using ArcGIS. The traditional calculation method for WFFZH only considers the soil layer’s inhibition effect whereas our comprehensive prediction method considers multiple factors. The verification of field investigation indicates that the comprehensive prediction method is more accurate than the traditional WFFZH calculation method.

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Acknowledgements

The authors thank the Shaanxi Coal and Chemical Technology Institute Co., Ltd. and the Shennan Mining Company for their support and permission of data access. Financial support for this work is provided by the National Natural Science Foundation of China (No.42007239), the National Natural Science Foundation of Shandong Province (No. ZR2020QE130), State Key Laboratory of Water Resources and Hydropower Engineering Science (Wuhan University) (No.2019NSG03), Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education (Tongji University) (No. KLE-TJGE-B1902), and the Future Plan for Young Talent in Shandong University and the Fundamental Research Funds of Shandong University.

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Correspondence to Haofang Wang.

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Liu, S., Dai, S., Wang, H. et al. Height of overlying strata failure zone under different hydrogeological units. Environ Earth Sci 81, 246 (2022). https://doi.org/10.1007/s12665-022-10371-3

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