ORIGINAL RESEARCH article
Front. Built Environ.
Sec. Geotechnical Engineering
Volume 11 - 2025 | doi: 10.3389/fbuil.2025.1597484
Study on the slip characteristics of the waste dump of Zijinshan Gold Copper Mine under the action of groundwater seepage
Provisionally accepted
- 1China Academy of Safety and Technology, Beijing, China
- 2Cathay Safety Technology Co., Ltd., Beijing, China
- 3Zijinshan Gold and Copper Mine, Zijin Mining Group Company Limitied, Longyan, China
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Groundwater seepage has a significant impact on the stability of the slope of the waste dumping site.In order to explore the instability characteristics of the waste dumping site of Zijinshan Gold and Copper Mine under the action of groundwater seepage, this paper uses physical and mechanical property testing, theoretical analysis of groundwater seepage field, and numerical simulation methods to explore and analyze. The results show that: (1) the internal structure of the rock and soil foundation soil of Zijinshan Gold and Copper Mine waste dumping site softens under seepage, the permeability increases, the pore water pressure increases, the friction between particles decreases, the mechanical strength decays significantly, and the strain softening characteristics are obvious. (2) Under the condition of no seepage, the maximum sliding amount of the slope of the waste dump is 7.82m, and under seepage, the maximum sliding amount is 10.23m. The development of cracks on the slope of the waste dump is mainly concentrated within 15m of the slope surface, and they develop and penetrate upwards at an angle of about 45 °at the bottom of the slope, forming a relatively complete sliding surface. The sliding surface is approximately "C" shaped, and the instability radiation range and degree are more obvious. Under seepage, the total number of cracks inside the slope increased by 68.29% compared to without seepage. (3) The seepage effect destroys the structural stability of the slope of the waste dump, and the peak of seepage pressure appears at the bottom corner of the slope. When the internal structural planes of the slope weaken and cannot resist the shear stress generated by external forces, the slope of the waste dump experiences sliding instability. (4) The minimum safety factor of the slope of the waste dump in the research area under groundwater seepage conditions is 1.031~1.104, and the slope of the waste dump is prone to slip. The proposed "anchor net+grouting" anti-seepage and anti-skid scheme has a good control effect on the stability of the waste dump slope under seepage.
Keywords: Structural instability, Slope stability control, Groundwater seepage, Structural plane slip, Slope disaster prevention and control
Received: 21 Mar 2025; Accepted: 04 Jun 2025.
Copyright: © 2025 Zhang, Gu, Deng, Ma and Lai. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Haitao Ma, China Academy of Safety and Technology, Beijing, China
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