Failure Mechanism and Stability Control Technology of Slope during Open-Pit Combing Underground Extraction: A Case Study from Shanxi Province of China

Shi, Shuaihang; Guo, Zhengfu; Ding, Peng; Tao, Yabin; Mao, Hui; Jiao, Zhichao

doi:10.3390/su14148939

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…The stability problems of rock masses, such as slope instability and mining subsidence, also exhibit significant differences compared to those under single mining conditions [4][5][6][7]. Shi et al [8] took the Anjialing Coal Mine in Shanxi Province as an example to test the physical and mechanical properties of coal and rock in the laboratory. The similarity criterion is used to establish a similar experimental model of slope deformation evolution in an open-pit mine section, and the digital scattering method is used to test the influence of underground mining process parameters on the deformation evolution of an open-pit mine slope.…”

Section: Introductionmentioning

confidence: 99%

Slope Failure of Shilu Metal Mine Transition from Open-Pit to Underground Mining under Excavation Disturbance

Yuan,

Ma,

Guo

et al. 2024

Applied Sciences

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The instability of slopes and ground subsidence caused by the conversion from open-pit to underground mining are important aspects of mining disaster research. This study focuses on the instability of slopes and ground subsidence during the conversion from open-pit to underground mining in the Beiyi mining area of the Shilu iron ore mine. Using numerical simulation and analysis, this study establishes a mechanical analysis model to assess the rock stability and movement of rockfall. The research findings indicate that there are significant stress concentration phenomena in the surrounding and floor areas of the goaf during the mining process. The collapse zone mainly develops in the western area before and after a certain level of mining and then shifts to the eastern part of Beiyi area. Surface subsidence expands after mining at a certain level, resulting in a large-scale disturbance area. Furthermore, the eastern slope experiences extensive landslides. This study suggests the continued monitoring of landslides and slope stability in specific areas of the mine. The research results can help us to understand the stability of the open-pit to underground rock mass in Hainan, judge the development trend of the surface subsidence range, and provide a reference for the stability evaluation of the rock mass mined by the open-pit-to-underground caving method.

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Section: Introductionmentioning

confidence: 99%

Slope Failure of Shilu Metal Mine Transition from Open-Pit to Underground Mining under Excavation Disturbance

Yuan,

Ma,

Guo

et al. 2024

Applied Sciences

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“…Wang et al [7], through similar simulation tests, summarized that the deformation evolution of slopes under underground coal mining has three stages: surface modification, structural modification, and time-dependent deformation. Ding et al [8] and Shi et al [9], focusing on the Anjialing coal mine, established a FLAC3D numerical analysis model and a similar test model to investigate the mechanical behavior of overlying strata and the deformation process of slopes during coal mining, respectively.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Soil Slope Stability under Underground Coal Seam Mining Using Improved Radial Movement Optimization with Lévy Flight

Li,

Jin,

Liu

2024

Mathematics

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Underground coal seam mining significantly reduces the stability of slopes, especially soil slopes, and an accurate evaluation of the stability of soil slopes under underground mining conditions is crucial for mining safety. In this study, the impact of coal seam mining is considered as the additional horizontal and vertical stresses acting on the slope, and an equation for calculating the safety factor of soil slopes under underground mining conditions is derived based on the rigorous Janbu method. Then, the Improved Radial Movement Optimization (IRMO) algorithm is introduced and combined with Lévy flight optimization to conduct global optimization searches, obtaining the critical sliding surface and corresponding safety factor of the soil slope under underground coal seam mining. Through comparisons with the numerical simulation results in three different case studies, the feasibility of applying the IRMO algorithm with Lévy flight to analyze the stability of soil slopes under underground mining is demonstrated. This ensures the accuracy and stability of the calculation results while maintaining a high convergence efficiency. Furthermore, the effects of the mining thickness and mining direction on slope stability are analyzed, and the results indicate that a smaller mining thickness and mining along the slope are advantageous for slope stability. The method proposed in this study provides valuable insights for preventing the slope instability hazards caused by underground coal seam mining.

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“…With the application of remote sensing techniques, surface deformation monitoring using high-resolution satellite data has been widely used and it can well realize the monitoring over a very large area. Many related studies have been carried out on surface deformation such as deformation in volcanoes [1], glacier movement [6][7][8][9][10], landslides [4,[11][12][13], permafrost [14], land subsidence [15,16], deformation in mining areas [5,[17][18][19][20] or other geohazards detections [2,[21][22][23][24]. A variety of approaches using interferometric synthetic aperture radar (InSAR) or space-borne differential InSAR have been used for the monitoring of mining-induced displacements in many mining areas [5].…”

Section: Introductionmentioning

confidence: 99%

Retrieving Surface Deformation of Mining Areas Using ZY-3 Stereo Imagery and DSMs

Hu,

Xu,

Zhang

et al. 2023

Remote Sensing

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Measuring surface deformation is crucial for a better understanding of spatial-temporal evolution and the mechanism of mining-induced deformation, thus effectively assessing the mining-related geohazards, such as landslides or damage to surface infrastructures. This study proposes a method of retrieving surface deformation by combining multi-temporal digital surface models (DSMs) with image homonymous features using China’s ZY-3 satellite stereo imagery. DSM is generated from three-line-array images of ZY-3 satellite using a rational function model (RFM) as the imaging geometric model. Then, elevation changes in deformation are extracted using the difference of DSMs acquired at different times, while planar displacements of deformation are calculated using image homonymous features extracted from multi-temporal digital orthographic maps (DOMs). Scale invariant feature transform (SIFT) points and line band descriptor (LBD) lines are selected as two kinds of salient features for image homonymous features generation. Cross profiles are also extracted for deformation in typical regions. Four sets of stereo imagery acquired in 2012 to 2022 are used for deformation extraction and analysis in the Fushun coalfield of China, where surface deformation is quite distinct and coupled with rising and descending elevation together. The results show that 21.60% of the surface in the study area was deformed from 2012 to 2017, while a decline from 2017 to 2022 meant that 17.19% of the surface was deformed with a 95% confidence interval. Moreover, the ratio of descending area was reduced to 6.44% between 2017 and 2022, which is lower than the ratios in other years. The slip deformation area in the west open pit mine is about 1.22 km2 and the displacement on the south slope is large, reaching an average of 26.89 m and sliding from south to north to the bottom of the pit between 2012 and 2017, but elevations are increased by an average of about 16.35 m, involving an area of about 0.86 km2 between 2017 and 2022 due to the restoration of the open pit. The results demonstrate that more quantitative features and specific surface deformation can be retrieved in mining areas by combining image features with DSMs derived from ZY-3 satellite stereo imagery.

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Failure Mechanism and Stability Control Technology of Slope during Open-Pit Combing Underground Extraction: A Case Study from Shanxi Province of China

Cited by 5 publications

References 36 publications

Slope Failure of Shilu Metal Mine Transition from Open-Pit to Underground Mining under Excavation Disturbance

Slope Failure of Shilu Metal Mine Transition from Open-Pit to Underground Mining under Excavation Disturbance

Analysis of Soil Slope Stability under Underground Coal Seam Mining Using Improved Radial Movement Optimization with Lévy Flight

Retrieving Surface Deformation of Mining Areas Using ZY-3 Stereo Imagery and DSMs

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