Abstract
The surface subsidence under ultra-thick weakly cemented overburden exhibits the abnormal characteristics of being seriously small, which brings serious safety hazard to the efficient mining. A comprehensive analysis of the causes behind the abnormal surface deformation characteristics under ultra-thick weakly cemented overburden was undertaken through theoretical analysis and numerical simulation. The results indicated that when the mining degree exceeded the critical value (900 m), the fracture of the super-thick and weakly consolidated overburden occurred. At this point, the energy was rapidly dissipated, and the surface subsidence suddenly increased. Against this backdrop, a novel regional strata movement control method for the high-intensity and safe mining of super-thick and weakly consolidated overburden is proposed. It could provide technical support for the high-intensity and safe mining of the super-thick and weakly consolidated overburden.
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Funding
This work was funded by the National Natural Science Foundation of China (42174048), the Joint Funds of the National Natural Science Foundation of China (U21A20109), the Natural Science Foundation of Jiangsu Province (BK20220158) and the Scientific Research Project of Jiangsu Bureau of Geological and Mineral Exploration (2021KY08).
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Conceptualization, Huaizhan Li, Guangli Guo and Jingchao Sun; Data curation, Huaizhan Li and Jingchao Sun; Formal analysis, Huaizhan Li and Jianfeng Zha; Funding acquisition, Huaizhan Li and Guangli Guo; Investigation, Huaizhan Li, Guangli Guo, Jianfeng Zha, Liangui Zhang and Hui Zheng; Methodology, Yaqiang Gong and Cheng Huang; Project administration, Guangli Guo and Liangui Zhang; Resources, Guangli Guo and Hui Zheng; Software, Yaqiang Gong; Supervision, Jingchao Sun, Cheng Huang and Huaizhan Li; Visualization, Guangli Guo and Huaizhan Li; Writing – original draft, Huaizhan Li; Writing – review & editing, Huaizhan Li, Guangli Guo, Jingchao Sun, Cheng Huang, Guangli Guo, Jianfeng Zha.
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Li, H., Sun, J., Huang, C. et al. Surface deformation abnormal characteristics of ultra-thick and weakly consolidated overburden and its disaster control method. Environ Earth Sci 83, 115 (2024). https://doi.org/10.1007/s12665-024-11421-8
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DOI: https://doi.org/10.1007/s12665-024-11421-8