Research on rock strength prediction method based on rock fragment br upscaling theory
ZHAO Jianjian1, WANG Qian2, YANG Fujian3, CHEN Shi3, HU Dawei3, SHAO Jianfu4, #br# XIE Bing1, SONG Baiyang1, LI Ning1
(1. School of Intelligent Construction and Civil Engineering, Luoyang Institute of Science and Technology, Luoyang, Henan 471023, China; 2. CNPC Engineering Technology R&D Company Limited, Beijing 102206, China; 3. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 4. University of Lille, Lille 59655, France)
Abstract:Rock mechanics parameters are crucial for the design and construction of deep underground engineering projects. However, their reliability is often compromised due to challenges in core extraction and in-situ testing. To tackle this issue, this study adopts a micro-scale perspective on rocks, introducing the Hill tensor to precisely describe the morphological distribution characteristics of different mineral components, as well as internal pores and fractures, at the micro-scale and their significant impact on the macro-scale physical and mechanical properties of rocks. Subsequently, upscaling theory is utilized to establish a functional relationship between the complex microstructure and macro-mechanical properties of rocks. Building on this foundation, a localized tensor is innovatively introduced to accurately represent the mathematical correlation between deformations at the micro-scale and the macro-scale. Throughout this process, the study thoroughly considers the damage mechanisms at the micro-scale, enhancing the model's predictive accuracy and applicability. Furthermore, the study fully accounts for the influence of confining pressure on rock mechanical behavior, aligning the model more closely with real-world engineering conditions. The results indicate that the model, based on the mineral content, mineral elastic parameters, and pore characteristics within the rock, can quantitatively characterize the macro-scale elastic modulus and rapidly predict both linear and nonlinear deformations, considering the effects of rock damage and confining pressure.
赵建建1,王 倩2,杨福见3,陈 石3,胡大伟3,邵建富4,谢 冰1,宋白杨1,李 宁1. 基于岩屑升尺度理论的岩石强度预测方法研究[J]. 岩石力学与工程学报, 2025, 44(6): 1527-1538.
ZHAO Jianjian1, WANG Qian2, YANG Fujian3, CHEN Shi3, HU Dawei3, SHAO Jianfu4, . Research on rock strength prediction method based on rock fragment br upscaling theory. , 2025, 44(6): 1527-1538.
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