Effect of slope angle on fractured rock masses under combined influence of variable rainfall infiltration and excavation unloading

扫码查看

原文链接

万方数据
维普

外文摘要：Intense precipitation infiltration and intricate excavation processes are crucial factors that impact the stability and security of towering and steep rock slopes within mining sites.The primary aim of this research was to investigate the progression of cumulative failure within a cracked rock formation,considering the combined effects of precipitation and excavation activities.The study was conducted in the Huangniuqian eastern mining area of the Dexing Copper Mine in Jiangxi Province,China.An engi-neering geological investigation was conducted,a physical model experiment was performed,numerical calculations and theoretical analysis were conducted using the matrix discrete element method(Mat-DEM),and the deformation characteristics and the effect of the slope angle of a fractured rock mass under different scenarios were examined.The failure and instability mechanisms of the fractured rock mass under three slope angle models were analyzed.The experimental results indicate that as the slope angle increases,the combined effect of rainfall infiltration and excavation unloading is reduced.A novel approach to simulating unsaturated seepage in a rock mass,based on the van Genuchten model(VGM),has been developed.Compared to the vertical displacement observed in a similar physical experiment,the average relative errors associated with the slope angles of 45°,50°,and 55° were 2.094％,1.916％,and 2.328％,respectively.Accordingly,the combined effect of rainfall and excavation was determined using the proposed method.Moreover,the accuracy of the numerical simulation was validated.The findings contribute to the seepage field in a meaningful way,offering insight that can inform and enhance existing methods and theories for research on the underlying mechanism of ultra-high and steep rock slope instability,which can inform the development of more effective risk management strategies.

外文关键词：

Open-pit to underground excavationRainfall infiltrationSimilarity simulationNumerical simulationImage recognitionSlope angle

作者：

Xiaoshuang Li、Qihang Li、Yunmin Wang、Wei Liu、Di Hou、Chun Zhu

展开 >

作者单位：

School of Urban Construction,Changzhou University,Changzhou,213164,China

College of Civil Engineering,Qilu Institute of Technology,Jinan,250200,China

School of Resources and Safety Engineering,Chongqing University,Chongqing,400044,China

Sinosteel Maanshan General Institute of Mining Research Co.Ltd.,Maanshan,243000,China

Guizhou Survey and Design Research Institute for Water Resources and Hydropower,Guiyang,550001,China

School of Earth Sciences and Engineering,Hohai University,Nanjing,210098,China

展开 >

基金：

Research Fund of National Natural Science Foundation of China(NSFC)Research Fund of National Natural Science Foundation of China(NSFC)Project of Slope Safety Control and Disaster Prevention Technology Innovation team of"Youth Innovation Talent Introduction a

项目编号：

4247714242277154Lu Jiao Ke Han[2021]51

出版年：

2024

DOI：

10.1016/j.jrmge.2024.08.019

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(10)