岩土力学2025，Vol.46Issue(9)：2749-2762,14.DOI:10.16285/j.rsm.2024.1367
岩溶区非均质岩组岩体力学参数快速估计方法研究
Rapid estimation method for mechanical parameters of heterogeneous rock formations in karst areas
摘要
Abstract
The natural topography of karst regions is favorable for pumping and storage projects,however,karst development creates heterogeneous engineering geological rock groups,which can compromise project stability.Therefore,accurately estimating the mechanical characteristics of such heterogeneous rock masses in karst areas is crucial.Existing methods for estimating rock mass mechanical parameters fail to adequately quantify dissolution-induced heterogeneity,referred to here as dissolution characteristics.This study analyzes the impact of dissolution on rock masses and introduces the dissolution rate,inhomogeneity coefficient,and degree of variation to characterize these dissolution-induced features.A method for preparing karst rock samples is proposed,and rock samples with specific karstification characteristics are prepared for uniaxial compression tests.The findings reveal a negative exponential relationship between mechanical parameters and dissolution rate.Additionally,the inhomogeneity coefficient and degree of variation influence these parameters by modifying dissolution impact coefficient,establishing a relationship expression linking mechanical parameters to dissolution characteristics.A field method for quickly determining dissolution characteristic indices is developed.By integrating the Hoek-Brown criterion with the established relationship expression,a rapid estimation method for mechanical parameters of heterogeneous rock masses in karst areas was created.The method is applied to the upper reservoir site of a proposed pumped storage power station in Hubei Province's karst region,demonstrating the validity of the estimated mechanical parameters and the strong engineering applicability of the developed method.关键词
非均质岩组/岩体溶蚀特征/单轴压缩试验/Hoek-Brown准则/岩体力学参数/快速估计Key words
heterogeneous rock formation/rock mass dissolution characteristics/uniaxial compression test/Hoek-Brown criterion/rock mechanical parameters/rapid estimation分类
建筑与水利引用本文复制引用
蔡玉娟,蔡静森,任少文,刘锴,陈劲,李漪..岩溶区非均质岩组岩体力学参数快速估计方法研究[J].岩土力学,2025,46(9):2749-2762,14.基金项目
中国地质大学(武汉)教学实验室开放基金项目(No.SKJ2023002) （武汉）
国家自然科学基金青年项目(No.41807264) （No.41807264）
教育部重点实验室开放基金课题(No.2020KDZ01) （No.2020KDZ01）
岩土钻掘与防护教育部工程研究中心开放课题基金(No.202102) （No.202102）
中国地质大学(武汉)杰出人才培育基金项目(No.CUG170686).This work was supported by the Teaching Laboratory Open Fund Project,China University of Geosciences(Wuhan)(SKJ2023002),the Youth Program of National Natural Science Foundation of China(41807264),the Open Fund Project of Key Laboratory of the Ministry of Education(2020KDZ01),the Open Project Fund of Geotechnical Drilling and Protection Engineering Research Center of the Ministry of Education(202102)and the Outstanding Talent Cultivation Fund Project,China University of Geosciences(Wuhan)(CUG170686). （武汉）
