Correlations of Cerchar abrasivity index with geomechanical properties of intact rocks and its application to cutter life evaluation

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-20 DOI:10.1007/s10064-025-04357-1

Zilong Zhou, Jinpeng Dong, Liuqi Zeng, Di Xu, Shaofeng Wang

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引用次数: 0

Abstract

Rock abrasivity is a critical factor to consider when assessing cutter wear and its service life during rock excavation. To determine rock abrasivity, the Cerchar Abrasivity Test is commonly used to derive the Cerchar Abrasivity Index (CAI) due to its effectiveness and convenience. In this study, 18 different types of intact rocks were selected for testing their geomechanical properties, including density, P-wave velocity (UPV), hardness (H), uniaxial compression strength (UCS), Brazilian tensile strength (BTS), elastic modulus (E), brittleness index (B) and equivalent quartz content (EQC). Subsequently, the correlations between CAI and these geomechanical parameters were analyzed. Simple and multiple regression analysis were conducted to obtain estimation models for calculating the basic mechanical parameters of rocks. The results of the simple regression show a strong positive correlation between CAI and UCS, BTS, E, H, B, and EQC. The correlation coefficients of CAI with each parameter are all higher than 0.8. By contrast, the multiple regression equations with higher coefficients of determination are more precise and reliable than simple regression equations. Finally, it was concluded that the Cerchar Abrasivity Index can effectively estimate cutter life and provide guidance for projects.

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炭磨损指数与完整岩石地质力学性质的相关性及其在刀具寿命评价中的应用

岩石磨耗性是岩石开挖过程中刀具磨损及其使用寿命评估的重要因素。在确定岩石的磨耗性时，由于其有效性和方便性，通常采用Cerchar abability Test来推导Cerchar abability Index （CAI）。本研究选取了18种不同类型的完整岩石进行地质力学性能测试，包括密度、纵波速度（UPV）、硬度(H)、单轴抗压强度（UCS）、巴西抗拉强度（BTS）、弹性模量(E)、脆性指数(B)和等效石英含量（EQC）。随后，分析了CAI与这些地质力学参数的相关性。通过简单回归分析和多元回归分析，得到了计算岩石基本力学参数的估计模型。简单回归结果显示CAI与UCS、BTS、E、H、B、EQC呈正相关。CAI与各参数的相关系数均大于0.8。相比之下，具有较高决定系数的多元回归方程比简单回归方程更精确和可靠。最后得出结论，Cerchar磨损指数可以有效地估计刀具寿命，为工程提供指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.