Full
Outline
To address the local instability problem of the talc-bearing soft rock slope on the east side of the M Pit in an open-pit copper-cobalt mine, engineering geological investigation, three-dimensional numerical simulation (FLAC3D), and limit equilibrium analysis (Slide 2D/3D) were comprehensively employed to investigate and analyze the stability of the talc-bearing slope. The slope instability mechanism was revealed and a corresponding treatment scheme was proposed. The research results indicate that the east slope of the M Pit is in a stable state as a whole, but the slope section with talc exposure at +1 335 m to +1 380 m is in an unstable state. The talc layer has low strength and is prone to slaking upon contact with water, constituting a dominant weak interlayer. The shear strength of its interface with the surrounding rock decreases significantly, forming a potential sliding surface and leading to a deep shear-shallow tension failure mode of the talc-bearing slope. Accordingly, a comprehensive treatment scheme of "7% cement-treated soil replacement + steel-plastic geogrid + blind ditch drainage at the slope toe" was proposed and implemented. Nearly one year of on-site monitoring shows that the slope displacement curve is generally stable and the treatment effect is remarkable. The established treatment technology framework of "instability mechanism analysis-quantitative stability evaluation-treatment scheme design-treatment effect monitoring feedback" can provide a theoretical basis and engineering reference for the treatment of slopes containing weak interlayers such as talc.
48
8
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
