Analysis of the surface subsidence induced by sublevel caving based on GPS monitoring and numerical simulation

Zhao, Xingdong; Zhu, Qiankun

doi:10.1007/s11069-020-04119-0

Cited by 18 publications

(8 citation statements)

References 23 publications

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“…To comprehend the laws governing surface subsidence resulting from underground mining activities and assess their impact on the environment and infrastructure above ground level effectively, scholars have employed diverse measurement techniques for studying this phenomenon. The conventional approach involves establishing monitoring points on the ground while utilizing technologies like Electronic Total Station, horizontal measurement methods, Global Navigation Satellite Systems (GNSS), and Terrestrial Laser Scanning (TLS), among others [7][8][9][10][11], to accurately measure relative elevation changes at these points. Although these methods offer high accuracy monitoring levels, they are limited in terms of comprehensively monitoring point quantity and fail to depict subsidence characteristics within mining areas.…”

Section: Introductionmentioning

confidence: 99%

Study on the Movement of Overlying Rock Strata and Surface Movement in Mine Goaf under Different Treatment Methods Based on PS-InSAR Technology

Huang,

Li,

et al. 2024

Applied Sciences

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The goaf treatment of underground metal mines is an important link in mining, and it is particularly important to master the laws of overlying rock strata and surface movement of goaf. In this paper, Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) technology is used to monitor the surface subsidence of the Taibao lead-zinc mine, and the surface subsidence laws of goaf-closure, partial-filling, and full-filling treatments are analyzed by the time-series method. The findings indicate that the surface subsidence of the closed goaf is solely governed by the pillars, with the quality of these pillars playing a pivotal role in controlling such subsidence. Factors like stope span also influence the surface subsidence of partially filled goaf. Prior to compaction, it is primarily the pillars that control surface subsidence; however, after compaction, filling and pillars jointly regulate this phenomenon. Notably, in filled goaf, the quality of both roof and pillars significantly impacts surface subsidence. Before compaction occurs, control over surface subsidence is not evident, yet post-compaction, the filling is effective and tends to stabilize this process. The research findings are significant in enhancing goaf’s treatment efficacy, mitigating surface damage and minimizing ecological environmental impact.

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Section: Introductionmentioning

confidence: 99%

Study on the Movement of Overlying Rock Strata and Surface Movement in Mine Goaf under Different Treatment Methods Based on PS-InSAR Technology

Huang,

Li,

et al. 2024

Applied Sciences

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“…Despite high precision in subsidence monitoring, traditional methods such as precise leveling measurements (Wang, 2013), GPS measurements (Zhao and Zhu, 2020), and crack gauges (Bai et al, 2020) suffer from limitations such as low point density, providing only discrete subsidence data in well-explored deformation areas. Moreover, these methods are characterized by long observation cycles, high costs, lower efficiency, and struggle to meet the increasing demand for regional subsidence monitoring.…”

Section: Introductionmentioning

confidence: 99%

Study on surface deformation pattern in mine closure area of complex karst mountainous region based on SBAS-InSAR technology

Huang,

Dong,

et al. 2024

Front. Earth Sci.

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Liupanshui City in Guizhou Province represents a karst mountainous region with a delicate geological environment. The area has a long history of coal mining, and several coal mines have been progressively closed in recent years. However, even after closure of coal mines, the fractured rock mass in the mined-out areas continues to undergo deformation over a specific period. In karst mountainous regions, this deformation is affected by various factors including elevation, slope, precipitation, and vegetation. In this study, we employed SBAS-InSAR technology to construct a time series of surface deformation data from January 2019 to May 2022 within Liupanshui City’s LuJiaZhai-DaPingDi Minefield. Subsequently, this data was comprehensively analyzed in conjunction with time series vegetation cover, monthly precipitation, elevation, and slope data from the identical period. The key findings of this research are as follows: 1) After the closure of the mine, the subsidence area gradually stabilized, yet the volume of subsidence continues to increase. The subsidence area primarily occurs near the MaiZiGou Coal Mine air-mining area, which had a relatively short closure time, as well as in higher elevation areas in the southern and eastern parts of the minefield. Specifically, the maximum cumulative subsidence and the subsidence rate during the study period reached −60.3 mm and −21.83 mm/a, respectively. 2) Surface deformation is closely linked to slope, vegetation type, and rainfall, with subsidence rates and amounts noticeably higher during the rainy season than in the dry season. 3) Surface vegetation cover types display varied effects on deformation, with grassland or shrub areas being more sensitive to precipitation than forests. Forests, especially pine and fir, show a delayed subsidence response to rain, typically 2–3 months post-rainy season onset. This inhibitory effect lessens with increasing slope, particularly beyond a 25° threshold, where responsiveness to precipitation and associated subsidence significantly increase. The findings of this study hold substantial scientific implications for the restoration and management of closed mining areas, as well as the prevention of geological hazards in karst complex mountainous regions.

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“…Enough caved blocks can effectively prevent the deformation of the goaf surrounding rock [14][15][16]. However, the continuous upward caving of the surrounding rock of large goaf is easy to cause the surface subsidences [17][18][19][20][21][22]. Based on the theoretical research and engineering case studies, Ren et al [23] divided the caving characteristics of the process of surface subsidences into four stages: initial caving, continuous caving, large caving, and lateral caving.…”

Section: Introductionmentioning

confidence: 99%

Two-Stage Caving Characteristics of Complex Irregular Goaf: A Case Study in China

Zhang,

Zhou,

Zhang

et al. 2023

Advances in Civil Engineering

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Different from the goaf formed by normal mining, the goaf formed by the continuous caving of the lower illegal goafs is extremely irregular and unstable, which leads to the difference in the goaf caving characteristics. Taking the complex irregular goaf of the Shirengou Iron Mine in China as the research object, the 3D laser scanning technology is used to detect the goaf shape and analyze the cause of the formation. Then, the caving characteristics of the goaf are analyzed by the methods of the numerical simulation, the monitoring of the crash of the caving rock, and the monitoring of the deformation of the arch foot. The simulation results show that the transverse expansion of the irregular goaf boundary is mainly along the perpendicular to the direction of the ore body strike when the goaf caves upward in the initial stage. Additionally, the monitoring results show that the caving characteristics can be divided into two stages: the paroxysmal caving stage and the periodicity caving stage. The paroxysmal caving characteristics are intense and irregular, while the periodicity caving characteristics have obvious periodicity, which is mainly reflected in the periodic alternation between the mass caving and the temporary stability. The interval period of the goaf mass caving is about 15–30 days and is changed by the progress of filling treatment. The conclusions in this work reveal the particularity of the caving characteristics in the complex irregular goaf and contribute to the improvement of the caving characteristics and the prediction of mass caving.

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Analysis of the surface subsidence induced by sublevel caving based on GPS monitoring and numerical simulation

Cited by 18 publications

References 23 publications

Study on the Movement of Overlying Rock Strata and Surface Movement in Mine Goaf under Different Treatment Methods Based on PS-InSAR Technology

Study on the Movement of Overlying Rock Strata and Surface Movement in Mine Goaf under Different Treatment Methods Based on PS-InSAR Technology

Study on surface deformation pattern in mine closure area of complex karst mountainous region based on SBAS-InSAR technology

Two-Stage Caving Characteristics of Complex Irregular Goaf: A Case Study in China

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