Effect of alluvial thickness on the surface subsidence characteristics at deeply buried mining area with thin bedrock: A case study

作     者：WU Shanxi WEI Weijie LI Lianghui CHENG Boyuan ZHANG Shenyi XIE Huashun WU Shanxi;WEI Weijie;LI Lianghui;CHENG Boyuan;ZHANG Shenyi;XIE Huashun

作者机构：School of Energy and Mining EngineeringChina University of Mining and Technology-BeijingBeijing 100083China Top coal Caving Mining Research of Coal Mining IndustryBeijing 100083China Engineering Research Center of Green and Intelligent Mining for Thick Coal SeamMinistry of EducationBeijing 100083China Inner Mongolia Research InstituteChina University of Mining and Technology-BeijingInner Mongolia 017004China 

出 版 物：《Journal of Mountain Science》 (山地科学学报(英文))

年 卷 期：2025年第22卷第4期

页      面：1499-1515页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51934008 52374106 52204163 52404159) China Postdoctoral Science Foundation(Grant no.2024T171006) the Fundamental Research Funds for the Central Universities(Grant Nos.2024ZKPYNY04 2023ZKPYNY01 2023YQTD02) 

主　　题：Underground mining Surface subsidence Thick alluvial layer Thin bedrock Surface reservoir 

摘      要：Underground coal mining induces significant surface deformation and environmental damage,particularly in deeply buried mining areas with thin bedrock and thick alluvial *** on the case study of the Zhaogu No.2 coal mine in Xinxiang City,Henan Province,China,this study employs a comprehensive research methodology,integrating field investigations,numerical simulations,and theoretical analyses,to explore the surface subsidence features at deeply buried mining areas with thin bedrock and thick alluvial layers,to reveal the effect of alluvial thickness on the surface subsidence *** findings indicate that the surface subsidence areas span 4.2 km2 with an advanced influence distance of 540 *** rate of surface subsidence primarily depends on the panel s position and its advancing ***,the thickness of the alluvial layer amplifies both the extent and magnitude of surface *** displacement of overlying rock primarily exhibits a two-stage progression:the thin bedrock control stage and the alluvial control *** the thin bedrock control stage,surface subsidence initiates with relatively low subsidence values and ***,in the alluvial control stage,surface subsidence accelerates,leading to a rapid increase in both subsidence values and *** characteristics of rock formation displacement result in distinct phases of surface ***,the paper addresses the utilization of surface subsidence areas and proposes a method for calculating reservoir storage capacity in these *** to calculations,the storage capacity amounts to 1.05e7 m^(3).The research findings provide valuable insights into the surface subsidence laws in regions with similar geological conditions and practical implications for the management and utilization of subsided areas.