岩石材料抗拉强度与劈裂节理面形貌的
加载速率效应研究

doi:10.16285/j.rsm.2019.0525

岩土力学 ›› 2020, Vol. 41 ›› Issue (4): 1169-1178.doi: 10.16285/j.rsm.2019.0525

岩石材料抗拉强度与劈裂节理面形貌的加载速率效应研究

张茂础^{1, 2}，盛谦^{1, 2}，崔臻^{1, 2}，马亚丽娜^{1, 2}，周光新^{1, 2}

1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，湖北武汉 430071；2. 中国科学院大学，北京 100049

收稿日期:2019-03-19 修回日期:2019-07-10 出版日期:2020-04-11 发布日期:2020-07-01
通讯作者: 崔臻，男，1986年生，博士，副研究员，主要从事地下岩石工程稳定性评价方面的研究。E-mail: zcui@whrsm.ac.cn E-mail:mczhangUCAS@163.com
作者简介:张茂础，男，1994年生，博士研究生，主要从事岩土力学与工程方面的研究。
基金资助:
国家重点研发计划（No. 2016YFC0401803）；国家自然科学基金（No. 51779253，No. 41672319，No. 51991393）；深部岩土力学与地下工程国家重点实验室开放基金课题（No. SKLGDUEK1912）；长江科学院开放研究基金资助项目（No. CKWV2019746/KY）。

Effect of loading rate on tensile strength of rock materials and morphology of fracture joint surface

ZHANG Mao-chu^{1, 2}, SHENG Qian^{1, 2}, CUI Zhen^{1, 2}, MA Ya-li-na^{1, 2}, ZHOU Guang-xin^{1, 2}

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-03-19 Revised:2019-07-10 Online:2020-04-11 Published:2020-07-01
Supported by:
This work was supported by the National Key R&D Program of China (2016YFC0401803), the National Natural Science Foundation of China (51779253, 41672319, 51991393), the State Key Laboratory for Geo-Mechanics and Deep Underground Engineering, China University of Mining & Technology (SKLGDUEK1912) and the CRSRI Open Research Program (CKWV2019746/KY).

摘要/Abstract

摘要： 为研究岩石材料抗拉强度与劈裂节理面形貌的加载速率效应，使用花岗岩、玄武岩和灰岩3种岩石试样进行不同加载速率下的巴西劈裂试验，研究了岩石材料抗拉强度的加载速率效应。基于三维扫描建立劈裂节理面数字地形，定性地研究了加载速率对劈裂节理面破坏形貌的影响。随后通过3种岩样劈裂节理面粗糙度指标的计算，定量地研究了粗糙度与加载速率和抗拉强度的关系。研究结果表明：岩石抗拉强度随加载速率的增加而增大，在双对数坐标系下，两者表现出较好的线性相关性，根据3种岩石材料劈裂节理面的表面形态，从粗糙度定性和定量结合评价的角度，对比得出加载速率和抗拉强度对试样劈裂节理面粗糙度具有显著影响，岩石的加载速率越大，抗拉强度越大，劈裂节理面粗糙度也随之越大。该研究结果为节理面形貌指标与力学参数的关系研究提供一定参考。

关键词: 巴西试验, 加载速率, 抗拉强度, 节理面形貌

Abstract: To investigate the effect of loading rate on tensile strength of rock materials and morphologies of fracture joint surfaces, Brazilian disc tests were conducted on three rock samples (i.e., granite, basalt and limestone) under different loading rates. The tensile strength was determined and the effect of loading rate on tensile strength was presented in detail. Three-dimensional (3D) scanning technique was employed to establish the digital terrain of fracture joint surface, and the effect of loading rate on fracture morphology of fracture surface was studied qualitatively. The relationships between surface roughness and loading rate and tensile strength were further analyzed by calculating the roughness index of fracture joint surface of three kinds of rock. The results show that tensile strength increases with the increase of loading rate, and under the double logarithmic coordinate system, it shows a good linear correlation between the parameters. According to the morphology of the fracture joint surface of rock materials, and from the perspective of the roughness of combination of qualitative and quantitative evaluation, it is found that the loading rate and tensile strength have a significant influence on the roughness of the fracture joint surface. The higher the loading rate is, the greater the tensile strength is, and the roughness of the fracture joint surface is. This study provides some reference for a better understanding of the relationship between the morphology index and mechanical parameters of the joint surface.

Key words: Brazilian disc test, loading rate, tensile strength, morphology of joint surface

中图分类号:

TU 411

张茂础, 盛谦, 崔臻, 马亚丽娜, 周光新. 岩石材料抗拉强度与劈裂节理面形貌的加载速率效应研究[J]. 岩土力学, 2020, 41(4): 1169-1178.

ZHANG Mao-chu, SHENG Qian, CUI Zhen, MA Ya-li-na, ZHOU Guang-xin. Effect of loading rate on tensile strength of rock materials and morphology of fracture joint surface[J]. Rock and Soil Mechanics, 2020, 41(4): 1169-1178.

参考文献

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岩石材料抗拉强度与劈裂节理面形貌的加载速率效应研究

Effect of loading rate on tensile strength of rock materials and morphology of fracture joint surface

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岩石材料抗拉强度与劈裂节理面形貌的 加载速率效应研究

Effect of loading rate on tensile strength of rock materials and morphology of fracture joint surface

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岩石材料抗拉强度与劈裂节理面形貌的加载速率效应研究