卸载条件下层状岩体力学特性研究

doi:10.13722/j.cnki.jrme.2014.s2.019

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摘要以绿片岩和大理岩组成的层状岩体为研究对象，采用FLAC3D对其进行加载和卸荷条件下的力学特性的数值分析。研究结果表明：若进行峰前恒轴压卸围压试验时，卸荷初始偏差应力对岩石卸荷破坏时的应力水平和变形有着明显的影响；若进行峰前升轴压卸围压试验时，应力增量比对岩石卸荷破坏时的应力水平和变形有着明显的影响；应力途径对岩石的强度和变形的影响极小；应力途径对层状岩体的强度的影响极小，但对层状岩体的变形的影响比较明显。

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	熊良宵1
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	虞利军3
	杨昌斌4
	李天斌2

关键词 ：岩石力学, 层状岩体, 卸荷, 强度特性, 变形特性

Abstract：Take the interlayered rock mass composed of green schist and marble as subject of study，the numerical analysis of its mechancial characteristics under unloading condition was done by using FLAC3D. The research results show that the initial deviatoric stress has great effect on stress state and deformation when rock sample fails of confining pressure reduction test under constant axial stress. The stress increment ratio also has great effect on stress state and deformation when rock sample fails of confining pressure reduction test with increasing axial stress. The stress path has little effect on characteristics of strength and deformation of rock. The strength of interlayered rock mass is nearly not influenced by the stress path，but the deformation is significantly affected.

Key words： rock mechanics interlayered rock mass unloading characteristics of strength characteristics of deformation

引用本文:

熊良宵1，2，虞利军3，杨昌斌4，李天斌2. 卸载条件下层状岩体力学特性研究[J]. 岩石力学与工程学报, 2014, 33(S2): 3545-3554.
XIONG Liangxiao1，2，YU Lijun3，YANG Changbin4，LI Tianbin2. RESEARCH ON MECHANICAL CHARACTERISTICS OF INTERLAYERED ROCK MASS UNDER UNLOADING CONDITION. , 2014, 33(S2): 3545-3554.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.019 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/3545

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