非充填岩石节理的动态剪切力学行为实验研究进展

岩石节理的动态剪切力学特性是岩体力学的基本问题之一,在地震工程、采矿工程、隧道工程等诸多领域有广泛应用。获取准确的岩石节理动态剪切力学参数是认识节理剪切力学行为的基础,国内外学者经过持续探索,研发了一系列动态剪切实验设备,形成了以传统定速直剪和循环剪切为主的实验技术体系。近几年发展的冲击直剪实验技术使这一体系更加完善。本文针对非充填岩石节理的动态剪切力学特性室内实验研究,首先系统阐述了相关实验技术的特点及其发展,然后总结了岩石节理动态剪切强度和变形特征的研究成果,最后提出值得进一步探索的问题。

PROGRESS OF EXPERIMENTAL STUDY ON DYNAMIC SHEAR BEHAVIORS OF UNFILLED ROCK JOINTS

The dynamic shear mechanical property of rock joints is one of the fundamental problems of rock mechanics, which have wide applications in many fields such as earthquake engineering, mining engineering and tunneling engineering. Obtaining accurate dynamic shear mechanical parameters of rock joints is the premise for understanding the shear mechanical behavior of joints. Owing to continuous exploration by scholars at home and abroad, a series of dynamic shear experimental apparatus has been developed. An experimental technology system dominated by traditional constant-rate direct shear test and cyclic shear test has been established. This system has been improved by the development of impact-induced direct shear test in recent years. This study focuses on the experimental study on dynamic shear mechanical behavior of rock joints. Firstly, the development of relevant experimental techniques and their technical characteristics are systematically described. Then, the research results on dynamic shear strength and deformation characteristics of rock joints are summarized. And finally the issues worth further exploration are suggested.