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Failure process and monitoring data of an extra-large landslide at the Nanfen Open-pit Iron Mine

Journal of Mountain Science 2024年第9期21卷 2918-2938页

作者： WANG Jingxiang YANG Xiaojie TAO Zhigang HE Manchao SHEN Fuxin State Key Laboratory for Tunnel Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

An extra-large landslide occurred on June 19,2021,on the footwall slope of the Nanfen Open-pit Iron Mine in Liaoning Province,China,with a volume of approximately 1.2×107 *** elucidate the causative factors,development process,and destructive mechanisms of this catastrophic landslide,comprehensive field tests,investigations,and laboratory experiments were ***,the heavily weathered rock mass of the slope was intersected by faults and joint fissures,facilitating rainwater ***,the landslide contained a substantial clay mineral with highly developed micro-cracks and micro-pores,exhibiting strong water-absorption *** moisture content increased,the rock mass underwent softening,resulting in reduced ***,continuous heavy rainfall infiltration amplified the slope's weight,diminishing the weak structural plane's strength,leading to fracture propagation,slip plane penetration,and extensive tensile-shear and uplift failure of the *** study highlights poor geological conditions as the decisive factor for this landslide,with continuous heavy rainfall as the triggering ***,adverse environmental factors persistently affect the landslide,and deformation and failure continue to ***,it is imperative to urgently implement integrated measures encompassing slope reinforcement,monitoring,and early-warning to real-time monitor the landslide's deformation and deep mechanical evolution trends.

关键词： landslide development process Extra-large landslide Heavy rainfall Failure characteristics Instability mechanism landslide monitoring and early-warning

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