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卸荷条件下岩石变形及破裂特征试验研究

发表时间:2010-01-31  浏览量:1935  下载量:833
全部作者: 黄达,黄润秋
作者单位: 重庆大学土木工程学院;成都理工大学地质灾害防治与环境保护国家重点实验室
摘 要: 基于岩石试件的卸荷试验,研究卸荷条件下岩石的应力-应变全过程曲线和破裂特征。研究表明:卸荷过程中岩石向卸荷方向回弹变形强烈、扩容显著、脆性破坏特征明显;卸荷条件下岩石破坏具有较强的张性破裂特征,各种级别的张裂隙发育,其剪性破裂面追随张拉裂隙发展,以共轭X或局部剪切破坏为主;当双向卸荷时,在次卸荷方向上也可能出现张拉裂隙。
关 键 词: 岩石力学;卸荷试验;变形特征;破裂特征
Title: Experimental study on deformation and fracture characteristics of rock on condition of unloading
Author: HUANG Da, HUANG Runqiu
Organization: College of Civil Engineering, Chongqing University;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology
Abstract: Based on unloading tests of rock samples, the fracture features and complete stress-strain curves of rocks on the condition of unloading are studied. The researches show that: the characteristics of intense rebound deformation, distinct dilatancy and brittleness failure of rocks present in process of unloading; the fracture is characterized by strong tensile one, all kinds of tensile cracks are developed, the shear fractures expand following tensile cracks and their primary styles are conjugate X or partial shear one on the condition of unloading; and the tensile cracks possibly appear in hypo-unloading one when the rock samples are unloaded in two directions.
Key words: rock mechanics; unloading test; deformation feature; fracture feature
发表期数: 2010年1月第2期
引用格式: 黄达,黄润秋. 卸荷条件下岩石变形及破裂特征试验研究[J]. 中国科技论文在线精品论文,2010,3(2):150-155.
 
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