摘要
针对层状岩体的破损特征开展了一系列的室内模型试验,分析层状岩体单轴压缩情况下的变形破坏特征,探讨倾角及夹层变化对岩体强度和破损的影响规律.室内试验结果表明:当岩层倾角较小时(θ<45°),岩体破坏主要为岩石先破坏,后层间错动破坏;当岩层倾角增大时(45°≤θ<75°),岩体的破坏以层间的剪切破坏为主,并伴有劈裂破坏;当岩层倾角增大到90°时,岩体的破坏为沿层间直接破坏,伴有局部的失稳劈裂.采用ABAQUS软件对上述模型试验进行数值模拟,数值模拟及理论分析表明:岩体的压缩强度呈先减小后增大的"U"形分布,计算结果与室内实验结果具有较好的一致性.
In view of the failure characteristics of layered rock mass,a series of physical experiments were carried out in this paper.The disruption and strength features of the layered rock in the case of uniaxial compressive are discussed to explore the discipline of the dip angle and interlayer changes effect on strength and breakage of rock mass.The test results show that the rock mass destruction modes are mainly rock destruction for small dip angle （θ 〈 45 °）,interlaminar shear failure with the dip angle increases （45 ° ≤ θ 〈 75°） and layer directly damage with local splitting failure for the dip angle of 90°.Abaqus software was used for the numerical simulation on the above model tests.The theoretical analysis and numerical simulation show that the compressive strength of rock is first decreased and then increased with the ＂U＂-shaped distribution.The calculation results are consistent with the results of laboratory test.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2014年第5期69-73,91,共6页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(41102182)
湖北省自然科学基金资助项目(2011CDB008)
中国石油科技创新基金(2011D-5006-0603)
湖北省建设科技计划项目(2011-119)
关键词
层状岩体
室内实验
破损特征
倾角
数值模拟
layered rock mass
laboratory test
failure characteristic
inclination angle
numerical simulation
