| Title: |
Advances and Future Directions in Monitoring and Predicting Secondary Surface Subsidence in Abandoned Mines. |
| Authors: |
Zhao, Ruonan1 (AUTHOR) 22719943@m.ursmu.ru, Du, Sen2 (AUTHOR) dusen@ucm.es, Zheng, Meinan3 (AUTHOR) zhengmn@aust.edu.cn, Guo, Qingbiao3 (AUTHOR) qbguoaust@163.com, Wang, Lei3 (AUTHOR) austwlei@163.com, Wang, Teng4,5 (AUTHOR) wteng_611@cumt.edu.cn, Guo, Xi6 (AUTHOR), Fernández, José2 (AUTHOR) |
| Source: |
Remote Sensing. Feb2025, Vol. 17 Issue 3, p379. 27p. |
| Subject Terms: |
*MINE subsidences, *COAL mining, *ABANDONED mines, *MINE closures, *MINES & mineral resources, *LONGWALL mining |
| Abstract: |
In recent years, the prolonged exploitation of coal resources has led to the depletion of coal reserves in some mining areas, resulting in the closure of certain mines worldwide. After mine closures, the fractured rock masses in abandoned mine cavities undergo weathering and degradation due to factors such as stress and groundwater, leading to reduced strength. This change alters the stress distribution and load-bearing capacity of the fractured rock within the abandoned voids, resulting in secondary or multiple deformations on the surface, which pose significant potential threats to surface infrastructure and public safety. Research into the mechanisms, patterns, and predictive methods of secondary surface subsidence in closed mines is thus of great theoretical and practical significance. Based on a literature review and practical monitoring experience in closed mine sites, this study systematically examines and analyzes the current state of secondary surface subsidence monitoring methods, formation mechanisms, spatiotemporal distribution patterns, and prediction methods in closed mines, as well as existing challenges. Initially, we compare the advantages and limitations of conventional surface deformation monitoring techniques with remote sensing techniques, emphasizing the benefits and issues of using InSAR technology for monitoring surface subsidence in closed mines. Next, by reviewing extensive data, we analyze the formation mechanisms and spatiotemporal evolution of secondary surface subsidence in closed mines. Building on this analysis, we discuss numerical and analytical methods for predicting secondary surface subsidence mechanisms in closed mines, evaluating the strengths and weaknesses of each approach. Predictive models for surface subsidence and uplift phases in the longwall collapse method are presented based on the constitutive relationships of fractured rock masses. Finally, the study highlights that the mechanisms and patterns of surface subsidence in closed mines represent a highly complex physical–mechanical process involving geological mining environments, fractured rock structures, constitutive relations, deformation characteristics, hydro-mechanical interactions, and groundwater dynamics, underscoring the need for further in-depth research. [ABSTRACT FROM AUTHOR] |
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