Stability analysis of multi-stage blasting rock slopes based on the Hoek-Brown criterion considering cumulative disturbance

IF 6.9 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-04-17 DOI:10.1016/j.enggeo.2025.108077

Feng Yang , Zhi-Wei Huang , Zhi-Ying Dai , San-Feng Liu , Lian-Heng Zhao

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引用次数: 0

Abstract

With the extension of service life of rocky slopes such as hydropower stations and mines, their surrounding slopes need to be reconstructed. In this study, a new range of blasting damage determination is proposed and the cumulative damage of multistage blasting is quantified by the excavation disturbance factor D. Taking Baihetan Hydropower Station as an example, the results show that: In one-stage blasting, the rock material parameters have the largest deterioration ratio at the excavation contour line. In multi-stage blasting, the deterioration ratio of rock material parameters reaches the maximum in the cumulative damage zone, especially at the slope top of each stage of excavation. The geological strength index GSI has a significant role in resisting slope blasting and improving the slope safety coefficient. Under the influence of cumulative damage of multi-stage blasting, the landslide surface of the slope is easy to be formed in the cumulative damage area, and local landslides occur. This study provides valuable insights into the construction of multi-stage blasting for excavating high and steep slopes.

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基于考虑累积扰动的Hoek-Brown准则的多级爆破岩质边坡稳定性分析

随着水电站、矿山等岩质边坡使用寿命的延长，需要对其周边边坡进行改造。本文提出了一种新的爆破损伤确定范围，并利用开挖扰动因子d量化了多段爆破的累积损伤。以白鹤滩水电站为例，结果表明：单段爆破时，岩体参数在开挖等高线处劣化率最大；在多段爆破中，岩石材料参数劣化率在累积损伤区达到最大值，特别是在各阶段开挖的边坡顶部。地质强度指标GSI对边坡抗爆破和提高边坡安全系数具有重要作用。在多段爆破累积损伤的影响下，边坡在累积损伤区内容易形成滑坡面，发生局部滑坡。该研究为高陡边坡多段爆破施工提供了有价值的指导。

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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.