Abstract
The deformation and failure of mining slopes in layered rocks predominantly result from shear landslides. However, the instability process of the Pusa rock avalanche in Guizhou, China, revealed a unique damage phenomenon: prominent breaking and toppling of rock blocks occurred in the central section of the mountain, with a lack of commonly observed shear landslide features. This paper aims to investigate the underlying reasons behind this distinctive damage pattern. The study employs various methods including geological survey, UAV aerial survey, physical simulation, and discrete element numerical simulation. The findings indicate that the geological conditions, characterized by a hard upper layer and a soft lower layer along with underground mining activities, play a significant role in triggering the landslide. Furthermore, the presence of a columnar structured rock mass emerges as the primary factor influencing the instability of the Pusa rock avalanche. To elucidate the mining failure mechanism of the rock mass with vertical joints, we propose a “subsidence-buckling” failure model. Following the subsidence and collapse of the roof rock mass in the goaf, the columnar rock mass in the upper and middle portions of the slope undergoes deflection and deformation, forming a three-hinged arch structure. This structural configuration converts the pressure exerted by the overlying rock mass into both vertical pressure and lateral thrust. Under the influence of external loads, the slope experiences buckling failure, ultimately leading to instability upon fragmentation. By shedding light on these findings, this study contributes to a better understanding of the spatiotemporal evolution of mining slope fractures and their impact on slope stability.
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References
Bhasin R, Kaynia AM (2004) Static and dynamic simulation of a 700-m high rock slope in western Norway. Eng Geol 71: 213–226. https://doi.org/10.1016/s0013-7952(03)00135-2
Chen L, Zhao C, Kang Y, et al. (2020) Pre-event deformation and failure mechanism analysis of the Pusa Landslide, China with multi-sensor sar imagery. Remote Sens 12 https://doi.org/10.3390/rs12050856
Cui F, Li B, Xiong C, et al. (2021) Dynamic triggering mechanism of the Pusa mining-induced landslide in Nayong county, Guizhou province, China. Geomatics Nat Hazards Risk 13: 123–147. https://doi.org/10.1080/19475705.2021.2017020
Dai Z, Zhang L, Wang Y, et al. (2021) Deformation and failure response characteristics and stability analysis of bedding rock slope after underground adverse slope mining. Bull Eng Geol Environ 80: 4405–4422. https://doi.org/10.1007/s10064-021-02258-7
Dash AK, Bhattacharjee RM, Paul PS (2016) Lessons learnt from Indian inundation disasters: An analysis of case studies. Int J Disaster Risk Reduct 20: 93–102. https://doi.org/10.1016/j.ijdrr.2016.10.013
Dong J, Li H, Wang Y, et al. (2021) Characteristics and monitoring-based analysis on deformation mechanism of Jianshanying landslide, Guizhou province, southwestern China. Arabian J Geosci 14 https://doi.org/10.1007/s12517-021-06473-0
Fan X, Xu Q, Scaringi G, et al. (2018) The “long” runout rock avalanche in Pusa, China, on august 28, 2017: A preliminary report. Landslides 16: 139–154. https://doi.org/10.1007/s10346-018-1084-z
Fathi Salmi E, Nazem M, Karakus M (2017) Numerical analysis of a large landslide induced by coal mining subsidence. Eng Geol 217: 141–152. https://doi.org/10.1016/j.enggeo.2016.12.021
Froude MJ, Petley DN (2018) Global fatal landslide occurrence from 2004 to 2016. Nat Hazards Earth Syst Sci 18: 2161–2181. https://doi.org/10.5194/nhess-18-2161-2018
Gokceoglu C, Sezer E (2009) A statistical assessment on international landslide literature (1945–2008). Landslides 6: 345–351. https://doi.org/10.1007/s10346-009-0166-3
Gu D, Huang D (2016) A complex rock topple-rock slide failure of an anaclinal rock slope in the Wu Gorge, Yangtze River, China. Eng Geol 208: 165–180. https://doi.org/10.1016/j.enggeo.2016.04.037
Li B, Huang D, Zhu YZ (2020) A complex slide-buckling-toppling failure of under-dip soft rock slopes. Eur J Environ Civ Eng 26: 4146–4169. https://doi.org/10.1080/19648189.2020.1839791
Marschalko M, Yilmaz I, Bednárik M, et al. (2012) Influence of underground mining activities on the slope deformation genesis: Doubrava Vrchovec, Doubrava Ujala and Staric case studies from Czech Republic. Eng Geol 147–148: 37–51. https://doi.org/10.1016/j.enggeo.2012.07.014
Mezam MC, Bachar Assed MA (2016) Retro-analytic study of the Northeastern edge landslide of Kef Essenoun open pit mine (Djebel Onk), Algeria. Bull Eng Geol Environ 76: 1307–1320. https://doi.org/10.1007/s10064-016-0988-x
Mo S, Sheffield P, Corbett P, et al. (2020) A numerical investigation into floor buckling mechanisms in underground coal mine roadways. Tunnelling Underground Space Technol 103 https://doi.org/10.1016/j.tust.2020.103497
Ozbay A, Cabalar AF (2014) Fem and lem stability analyses of the fatal landslides at Çöllolar open-cast lignite mine in Elbistan, Turkey. Landslides 12: 155–163. https://doi.org/10.1007/s10346-014-0537-2
Pourghasemi HR, Pradhan B, Gokceoglu C (2012) Application of fuzzy logic and analytical hierarchy process (ahp) to landslide susceptibility mapping at Haraz watershed, Iran. Nat Hazard 63: 965–996. https://doi.org/10.1007/s11069-012-0217-2
Sun XY, Ho CH, Li C, et al. (2020) Inclination effect of coal mine strata on the stability of loess land slope under the condition of underground mining. Nat Hazard 104: 833–852. https://doi.org/10.1007/s11069-020-04193-4
Tang J, Dai Z, Wang Y, et al. (2019) Fracture failure of consequent bedding rock slopes after underground mining in mountainous area. Rock Mech Rock Eng 52: 2853–2870. https://doi.org/10.1007/s00603-019-01876-8
Tao Z, Shu Y, Yang X, et al. (2020) Physical model test study on shear strength characteristics of slope sliding surface in Nanfen open-pit mine. Int J Min Sci Technol 30: 421–429. https://doi.org/10.1016/j.ijmst.2020.05.006
Tommasi P, Verrucci L, Campedel P, et al. (2009) Buckling of high natural slopes: The case of Lavini Di Marco (Trento-Italy). Eng Geol 109: 93–108. https://doi.org/10.1016/j.enggeo.2009.02.002
Wang S, Li X, Wang S (2018) Three-dimensional mineral grade distribution modelling and longwall mining of an underground bauxite seam. Int J Rock Mech Min Sci 103: 123–136. https://doi.org/10.1016/j.ijrmms.2018.01.035
Wang X, Xiao Y, Shi W, et al. (2022) Forensic analysis and numerical simulation of a catastrophic landslide of dissolved and fractured rock slope subject to underground mining. Landslides 19: 1045–1067. https://doi.org/10.1007/s10346-021-01842-y
Yao X, Chen Y, Liu D, et al. (2021) Average-dinsar method for unstable escarpments detection induced by underground coal mining. Int J Appl Earth Obs Geoinf 103 https://doi.org/10.1016/j.jag.2021.102489
Yu JL, Zhao JJ, Yan HY, et al. (2020) Deformation and failure of a high-steep slope induced by multi-layer coal mining. J Mt Sci 17: 2942–2960. https://doi.org/10.1007/s11629-019-5941-6
Zeng Q, Zhu J, Liao L, et al. (2021) High mobility of the channelized ancient linka rock avalanche within the Bangong - Nujiang suture zone, SE Tibetan Plateau. Eng Geol 282 https://doi.org/10.1016/j.enggeo.2021.105999
Zhao S, Chigira M, Wu X (2018) Buckling deformations at the 2017 Xinmo landslide site and nearby slopes, Maoxian, Sichuan, China. Eng Geol 246: 187–197. https://doi.org/10.1016/j.enggeo.2018.09.033
Zhao X, Zhu Q (2020) Analysis of the surface subsidence induced by sublevel caving based on GPS monitoring and numerical simulation. Nat Hazard 103: 3063–3083. https://doi.org/10.1007/s11069-020-04119-0
Zhu C, He M, Karakus M, et al. (2020) Investigating toppling failure mechanism of anti-dip layered slope due to excavation by physical modelling. Rock Mech Rock Eng 53: 5029–5050. https://doi.org/10.1007/s00603-020-02207-y
Acknowledgments
The research presented in this manuscript is funded by the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project(SKLGP2022Z001), National Natural Science Foundation of China (Grant No. 41877273), Science and Technology Plan Project of Sichuan Province (Grant No. 2021YJ0053), Sichuan Natural Science Foundation (Grant No. 2022NSFSC1176), Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 41521002) and POWERCHINA Science and technology project (Grant No. DJ-ZDXM-2020-03). We particularly thank the No.106 Geological Brigade of the Guizhou Geological Mineral Exploration and Development Bureau for its help in data collection.
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DENG Jie: Conceptualization, Methodology, Investigation, Visualization, Writing - original draft. ZHAO Jian-jun: Supervision, Funding acquisition, Methodology, Writing - review & editing. LAI Qi-yi: Methodology, Visualization. LI Ai-nong: Writing - review &editing. XIE Ming-li: Writing - review &editing. LI Qing-miao: Writing - review &editing. ZHAO Xiao: Writing - review &editing.
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Deng, J., Zhao, Jj., Lai, Qy. et al. Mechanism of subsidence-buckling and instability of slopes in thick-layered rigid rock under mining. J. Mt. Sci. 20, 2370–2387 (2023). https://doi.org/10.1007/s11629-023-7952-6
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DOI: https://doi.org/10.1007/s11629-023-7952-6