A study on the stability of dangerous rock mass under blasting vibration considering size effect

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-01 DOI:10.1007/s10064-025-04130-4

Xinggen Chen, Xinyu Qu, Hongtao Li, Cheng Li, Gongda Lu, Qiang Yao

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Abstract

The stability analysis of dangerous rock mass is the key to preventing and controlling dangerous rock mass collapse as a geological disaster. Indeed, it is of great practical significance to propose a scientific and relatively accurate stability computation method for predicting the collapse of dangerous rock mass. Based on conventional limit equilibrium, this study proposes a new theory considering the size effect of dangerous rock mass under various blasting vibration loads to assess its stability. The approach considers dangerous rock mass shape, geometrical size, blasting vibration frequency, and the initial phase of the blasting vibration wave in different directions. Based on the slice method, it establishes the stability analysis and calculation of dangerous rock mass, considering the size effect under blasting vibration. The corresponding calculation program is compiled using MATLAB to carry out calculation examples. The results indicate that the calculated minimum stability coefficients of dangerous rock mass in this study are proximate to those calculated by conventional pseudo-static analysis. However, this study's calculations are slightly larger than those computed by pseudo-static analysis, with a relative difference between 5.1% and 8.2%. The method proposed in this study provides a reference for dynamic stability analysis and evaluation for dangerous rock mass.

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考虑尺寸效应的爆破振动作用下危险岩体稳定性研究

危险岩体的稳定性分析是预防和控制危险岩体坍塌这种地质灾害的关键。因此，提出一种科学且相对准确的危险岩体坍塌稳定性计算方法具有重要的现实意义。本文在传统极限平衡理论的基础上，提出了考虑不同爆破振动荷载作用下危险岩体尺寸效应的稳定性评价新理论。该方法考虑了危险岩体的形状、几何尺寸、爆破振动频率以及不同方向上爆破振动波的初始相位。基于切片法，建立了考虑爆破振动作用下尺寸效应的危险岩体稳定性分析计算方法。利用MATLAB编写相应的计算程序，进行算例计算。结果表明，本文计算的危险岩体最小稳定系数与常规拟静力分析计算的最小稳定系数较为接近。然而，本研究的计算结果略大于伪静态分析的计算结果，相对差异在5.1%和8.2%之间。该方法可为危险岩体动力稳定性分析与评价提供参考。

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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.