文献类型：期刊文献

中文题名：岩体结构面基本摩擦角研究现状与展望

英文题名：Review on research advance of basic friction angle of rock joints

作者：雍睿[1,2];钟祯[1];杜时贵[1,2];郑爽[1];章莹莹[2]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]宁波大学岩石力学研究所,浙江宁波315211

年份：2022

卷号：41

期号：2

起止页码：254

中文期刊名：岩石力学与工程学报

外文期刊名：Chinese Journal of Rock Mechanics and Engineering

收录：CSTPCD、、CSCD2021_2022、EI(收录号：20220611600482)、Scopus、北大核心、CSCD、北大核心2020

基金：国家自然科学基金资助项目(42177117);国家自然科学基金青年基金资助项目(41502300)。

语种：中文

中文关键词：岩石力学;结构面;抗剪强度;基本摩擦角;试验方法;研究展望

外文关键词：rock mechanics;rock joints;shear strength;basic friction angle;experimental methods;research prospect

中文摘要：基本摩擦角的准确获取是客观评价岩体结构面抗剪强度的前提。基本摩擦角通常被视为易于获取的参数,但近年来大量研究结果表明,其测定结果往往随着试样本身性质、加工方式、测试方法等因素改变而发生较大变化。从结构面抗剪强度理论模型、力学机制、获取方法、研究趋势等方面对国内外有关基本摩擦角的研究成果进行归纳总结,结果表明:(1)基本摩擦性质参数存在于绝大多数抗剪强度模型中,但缺乏明确定义与测定步骤,特别是针对结构面基本摩擦性质来改进、优化抗剪强度模型的研究较少;(2)结构面矿物组成与形貌特征被广泛认为对基本摩擦角的力学机制起决定作用,但剪胀效应、尺寸效应等因素所产生的影响存在争议;(3)倾斜试验、直剪试验、拉拔试验、三轴试验与回弹试验是测定基本摩擦角的主要方法,但不同方法的可靠性、适用条件尚不明确;(4)目前已从岩石本身矿物组成与结构、粗糙度、尺寸效应、试样加工工艺、试验条件等方面对基本摩擦角进行了初步研究。基本摩擦角的力学机制有待于从岩石学、微观粗糙度、尺寸效应等角度进一步研究。从法向应力、剪切速率、温度、含水率等方面进一步完善基本摩擦角的试验方法是将来的研究趋势。

外文摘要：As a basic component of the shear strength of rock joints,the accurate acquisition of the basic friction angle is the prerequisite for evaluating the shear strength of rock joints. Generally,the basic friction angle is considered to be a parameter that can be easily obtained. However,many recent studies have shown that the basic friction angle varies significantly with the nature of the sample,the processing method and the measurement method. This paper summarized the research results of the basic friction angle from the aspects of the shear strength model,the mechanical mechanism,the acquisition method and research trends. The results show that the basic friction angle,involved in most shear strength models,lacks a clear definition and a determination method,and that,in particular,there are few studies on improving and optimizing the shear strength model based on the basic friction property of rock joints. It is generally believed that the mineral compositions and morphological characteristics of rock joints play a decisive role in the mechanical mechanism of the basic friction angle,but the influences of the dilatancy effect and the size effect on the basic friction angle are controversial. Tilt test,direct shear test,push-pull test,triaxial test and rebound test are the main experimental methods for obtaining the basic friction angle,but the reliabilities and the applicable conditions for these methods are still unclear. Alghouth at present the basic friction angle has been studied from the mineral composition and structure,roughness,size effect,sample processing technology,test conditions,etc.,further investigations are needed from the perspectives of petrology,micro-roughness and scale effects. It is also pointed out that there is a research trend of further improving the test methods of the basic friction angle by considering the normal stress,shear rate,temperature and humidity.