A new framework for geometrical investigation and stability analysis of high-position concealed dangerous rock blocks

Yan, Jianhua; Chen, Jianping; Zhou, Fanqin; Zhang, Wen; Zhang, Yansong; Zhao, Mingyu; Ji, Yaopeng; Liu, Yongqiang; Xu, Wanglai; Wang, Qing

doi:10.1007/s11440-022-01668-5

Cited by 6 publications

(2 citation statements)

References 69 publications

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“…Rockfalls, as one of the frequent geological hazards along mountainous areas, pose a serious threat to lives, facilities, environments and transportation corridors 1 , 2 . The presence of dangerous rocks is the main source for rockfalls.…”

Section: Introductionmentioning

confidence: 99%

“…These dangerous rocks can easily separate from structural planes of bedrock under the influence of gravity and triggering factors (such as earthquakes, rainfall and strong wind) 3 . The high positions and concealment of dangerous rocks lead to uncertain failure, and also, those rocks have high kinetic energy and high migration rates after instabilities 2 , 4 . Therefore, a deep knowledge of the mechanical characteristics and failure evolution of dangerous rocks is important to mitigate rockfall hazards.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative characterization of the failure behavior of dangerous rocks based on the Frozen-Thawing Test

Zhang

et al. 2023

Sci Rep

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A deep knowledge of the failure mechanisms and early warning of dangerous rocks is an important issue in geological disaster prevention and reduction. This study focuses on the failure analysis of dangerous rocks from a laboratory scale, whose models are prepared by 3D printing (3DP) technology. The frozen–thawing test (FTT) is performed to reproduce the failure processes of toppling and falling types dangerous rocks. In addition, the digital image correlation (DIC) technique is applied to detect the deformation characteristics of dangerous rock models during the tests. The relative displacements along the structural plane and the displacement vectors on the dangerous rock surface are further extracted to quantitatively reveal the failure mechanism from a fine-view perspective. It is found that the toppling type dangerous rock is dominated by the rotational failure, while the falling type dangerous rock is dominated by tensile‒shear failure. Furthermore, a DIC-based early warning method is proposed for identifying the precursors of dangerous rock instability from a laboratory perspective. The results provide an important application and reference value for the study of dangerous rock prevention and reduction.

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Section: Introductionmentioning

confidence: 99%