岩石失稳破裂的变形突跳研究  

STUDY ON SUDDEN JUMP OF DEFORMATION IN UNSTABLE FAILURE OF ROCKS

作　　者：陈忠辉[1] 唐春安[1] 傅宇方[1] 

机构地区：[1]东北大学资源与土木工程学院

出　　处：《工程地质学报》1997年第2期143-149,共7页Journal of Engineering Geology

基　　金：国家自然科学基金;国家教委跨世纪人才专项基金

摘　　要：针对在非刚性加载条件下岩石失稳破裂过程中变形突跳的特性，根据时间的不可逆性，研究了岩石试样在普通试验机下的变形规律及突跳特性，得到了与尖点突变模式相似的突变机构。再利用突变理论中尖点突变模型研究由试验机和岩石试样组成的力学系统的失稳机制，结果表明：两者得到的岩石变形突变量非常相似，且具有同一变化趋势。最后用ＨＰ７０９０绘图测试系统测出了岩石试样在失稳破裂时荷载、位移的突跳特征。Based on the sudden jump of deformation in unstable failure of rock under the soft loading condition, the deformation time curve of rock specimen was studied. The system composed of rock specimen and machine was studied by using a cusp catastrophic model. The result shows that the sudden jumps of deformation of rock specimens obtained by the two ways changed with the same trend. The deformation time and load time curves of rock specimens were measured by using HP 7090A Plot Measurement system under unstable condition. The experimental results are fairly in agreement with the theoretical consideration proposed and verified reliability of catastrophe theory in application to the study of rock.

关 键 词：失稳破裂 突变理论 岩石变形 岩石力学 

分 类 号：TU454[建筑科学—岩土工程]