Analysis of deformation mechanism of dolomite slope in Huangyukou and study on supporting effect of NPR anchor cable

WANG Fengnian; SUN Tong; LIU Keyuan; SUN Yingying; TAO Zhigang

doi:10.12075/j.issn.1004-4051.20240846

CHINA MINING MAGAZINE > 2024 > 33(S1): 151-156, 163. > DOI: 10.12075/j.issn.1004-4051.20240846

WANG Fengnian，SUN Tong，LIU Keyuan，et al. Analysis of deformation mechanism of dolomite slope in Huangyukou and study on supporting effect of NPR anchor cable[J]. China Mining Magazine，2024，33（S1）：151-156，163. DOI: 10.12075/j.issn.1004-4051.20240846

Citation:

PDF (4040 KB)

Analysis of deformation mechanism of dolomite slope in Huangyukou and study on supporting effect of NPR anchor cable

WANG Fengnian^{1, 2,},
SUN Tong³,
LIU Keyuan^{4, 5},
SUN Yingying^{4, 5},
TAO Zhigang^{4, 5, ,}

1.
Shanxi Provincial Transportation Technology Research and Development Co.，Ltd.，Transportation Industry Key Laboratory of Highway Construction and Maintenance Technology in Loess Areas，Taiyuan 030032，China
2.
School of Earth Sciences and Engineering，Hohai University，Nanjing 210098，China
3.
School of Energy and Mining engineering，China University of Mining and Technology-Beijing，Beijing 100083，China
4.
State Key Laboratory for Tunnel Engineering（Beijing），Beijing 100083，China
5.
School of Mechanics & Civil Engineering，China University of Mining & Technology-Beijing，Beijing 100083，China

More Information

Author Bio:
WANG Fengnian,
Received Date: May 15, 2024
Revised Date: May 16, 2024
Accepted Date: May 22, 2024
Available Online: July 04, 2024

Graphical Abstract

Abstract

Abstract

The Huangyukou slope in Yanqing is rich in dolomite resources. Under the combined action of excavation, rainfall and artificial mining, there is a serious instability phenomenon. There are many cracks on the front edge of the landslide and the surface of the landslide. At present, the instability mechanism and support countermeasures of the slope are lack of detailed analysis. In this paper, the instability mechanism of strongly weathered dolomite slope is studied by means of field investigation and numerical simulation experiment, and the supporting effect of NPR anchor cable on this kind of broken rock slope is verified by field monitoring. The results show that the cracks in the dolomite slope are mostly tensile and shear cracks, and the landslide mainly occurs creep deformation. The landslide belongs to the traction bedding rock landslide. The influence of rainfall on the slope is mainly the result of the combined action of saturated pore pressure and unsaturated pore pressure of rock and soil. Excessive rainfall will lead to the softening of bedrock at the leading edge of the slope, resulting in the occurrence of landslide. Through the excavation method to enhance the stability of the slope, the stability of the slope in the mining area is obviously improved after the reinforcement of the NPR anchor cable, and the Newton force is basically maintained above 300 kN, which can realize the stability control and remote real-time monitoring and early warning of the slope.
- dolomite,
- slope,
- Newtonian force,
- NPR anchor cable,
- numerical simulation

FullText(HTML)

References (6)

References

[1]	陶志刚, 刘珂源, 杨晓杰, 等. 高陡岩质边坡“面—点—面”稳定性综合评价方法: 以安太堡露天矿为例[J]. 金属矿山,2023(11):241-252. TAO Zhigang, LIU Keyuan, YANG Xiaojie, et al. “Plane-point-plane” stability integrated evaluation method of high and steep rock slope: a case study of Antaibao Open-pit Mine[J]. Metal Mine,2023(11):241-252.
[2]	肖超, 金福喜, 刘海鸿, 等. 开挖与降雨作用下边坡失稳机理及模拟分析[J]. 工程地质学报,2012,20(1):37-43. XIAO Chao, JIN Fuxi, LIU Haihong, et al. Mechanism of slope failure and numerical simulation analysis under slope excavation and rainfall infiltration[J]. Journal of Engineering Geology,2012,20(1):37-43.
[3]	姚裕春, 姚令侃, 袁碧玉. 边坡开挖迁移式影响离心模型试验研究[J]. 岩土工程学报,2006,28(1):76-80. YAO Yuchun, YAO Lingkan, YUAN Biyu. Study of centrifuge model tests on transition effect of cut slopes[J]. Chinese Journal of Geotechnical Engineering,2006,28(1):76-80.
[4]	李焕强, 孙红月, 孙新民, 等. 降雨入渗对边坡性状影响的模型实验研究[J]. 岩土工程学报,2009,31(4):589-594. LI Huanqiang, SUN Hongyue, SUN Xinmian, et al. Influence of rainfall infiltration on slopes by physical model test[J]. Chinese Journal of Geotechnical Engineering,2009,31(4):589-594.
[5]	杨国香, 叶海林, 伍法权, 等. 反倾层状结构岩质边坡动力响应特性及破坏机制振动台模型试验研究[J]. 岩石力学与工程学报,2012,31(11):2214-2221. YANG Guoxiang, YE Hailin, WU Faquan, et al. Shaking table model test on dynamic response characteristics and failure mechanism of anti layered rock slope[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(11):2214-2221.
[6]	何满潮, 王炯, 孙晓明, 等. 负泊松比效应锚索的力学特性及其在冲击地压防治中的应用研究[J]. 煤炭学报,2014,39(2):214-221. HE Manchao, WANG Jiong, SUN Xiaoming, et al. Mechanics characteristics and applications of prevention and control rock bursts of the negative poisson’s ratio effect anchor[J]. Journal of China Coal Society,2014,39(2):214-221.