Influence mechanisms and control effects of overburden on rock slope stability: case study in Yanqianshan iron mine, China

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-03-19 DOI:10.1007/s10064-025-04179-1

Lingfei Zhang, Zhongxin Wang, Jian Cao, Xiangyu Zeng, Fengliang Tian, Fengyang Xin, Junting Huang

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Abstract

With the continuous development of mineral resources, many open-pit mines are transitioning to underground mining projects as they reach greater depths. Long-term open-pit mining has resulted in the formation of high, steep slopes, the stability of which is significantly affected by the material overlaying the ore (the “overburden”). Landslide damage characteristics and deformation ranges of the Yanqianshan iron mine are analyzed in this study using unmanned aerial vehicle (UAV) photogrammetry and Small Baseline Subset InSAR (SBAS-InSAR) technology. Based on the limit equilibrium theory, this analysis reveals the control mechanism of the overburden on slope instability; a theoretical approach for calculating overburden thickness is also established using Janssen’s pressure theory. The effects of various treatment schemes are evaluated through a discrete–continuous coupling method and verified by field measurements. The results indicate that the overburden significantly influences slope stability. When the overburden influence coefficient u ≥ 1, it exerts a positive stabilizing effect. The optimal overburden thickness for the Yanqianshan iron mine is determined to be 65.38 m.

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.