Induced pattern of high and steep slope landslide under rainfall conditions

IF 1.6 3区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Journal of Geophysics and Engineering Pub Date : 2023-11-21 DOI:10.1093/jge/gxad098
Hailong Jin, Lin Huang, Chunlai Wang, Changfeng Li, Haer Yizi, Zhian Bai, Liang Sun, Ze Zhao, Biao Chen, Yanjiang Liu
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Abstract

Due to the deep concave mining in Bayan Obo stope, the slope angle is steep, the terrain is high, the outcrop width of the crushing belt is large, the stability of many slopes is poor, and there are potential sliding surfaces. In this paper, through on-site investigation and sampling, the main factors affecting the landslide of the high and steep slopes of Bayan Obo are analysed. Uniaxial compression tests were carried out to obtain the mechanical parameters of dolomite and slate. With the help of the three-dimensional digital speckle system, the whole process of slope landslide under rainfall conditions was studied through similar simulation and numerical simulation experiments. The influence of rainfall on the slope of Bayan Obo and the induced pattern of landslide were revealed. The experimental results show that rainfall is the key to inducing instability, the slippage at the edge of the slope is obvious, and there is seepage in the depth, but the effect is not significant. The landslide can be roughly divided into the damage accumulation stage; the deformation development and expansion stage and the unstable slip stage.
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降雨条件下高陡边坡滑坡的诱发模式
由于巴彦奥博斜坡深凹开采,坡角陡,地势高,破碎带出露宽度大,多处边坡稳定性差,存在潜在滑动面。本文通过现场调查和取样,分析了影响巴彦奥博高陡边坡滑坡的主要因素。通过单轴压缩试验获得了白云岩和板岩的力学参数。在三维数字斑点系统的帮助下,通过类似模拟和数值模拟实验研究了降雨条件下斜坡滑坡的全过程。揭示了降雨对巴彦奥博斜坡的影响以及滑坡的诱发模式。实验结果表明,降雨是诱发失稳的关键,边坡边缘滑动明显,深部有渗流,但影响不大。滑坡大致可分为破坏积累阶段、变形发展扩展阶段和不稳定滑动阶段。
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来源期刊
Journal of Geophysics and Engineering
Journal of Geophysics and Engineering 工程技术-地球化学与地球物理
CiteScore
2.50
自引率
21.40%
发文量
87
审稿时长
4 months
期刊介绍: Journal of Geophysics and Engineering aims to promote research and developments in geophysics and related areas of engineering. It has a predominantly applied science and engineering focus, but solicits and accepts high-quality contributions in all earth-physics disciplines, including geodynamics, natural and controlled-source seismology, oil, gas and mineral exploration, petrophysics and reservoir geophysics. The journal covers those aspects of engineering that are closely related to geophysics, or on the targets and problems that geophysics addresses. Typically, this is engineering focused on the subsurface, particularly petroleum engineering, rock mechanics, geophysical software engineering, drilling technology, remote sensing, instrumentation and sensor design.
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