Stress deformation properties of rock and rock discontinuities
Stress deformation properties of rock and rock discontinuities
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DOI：
10.1016/0013-7952(75)90014-9
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发表时间：
1975-12
影响因子：
7.4
通讯作者：
F. Kulhawy
中科院分区：
文献类型：
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作者：
F. Kulhawy
对岩石材料和岩石结构面的应力变形特性进行了广泛的文献调查。结果表明：（1）对于在单轴条件下测试的岩石，模量范围为约1至100 GN/m2，泊松比范围为0.02至0.73（如果不包括澄清剂值，则为0.46），平均值为0.20;（2）对于三轴条件下的岩石试验，岩石模量的非线性和应力依赖性的影响较小，（3）岩石模量的各向异性主要表现为模量数或初始刚度的变化，而非线性和应力相关性参数随样品取向的变化基本不变;（4）岩石泊松比的非线性和应力依赖性可能很重要，这取决于施加的应力变化的大小，其中非线性更重要;（5）岩石不连续性的有限数据表明，非线性和应力依赖性效应可能相当大。
The results of an extensive literature survey on the stress deformation properties of rock materials and rock discontinuities are summarized. The results show that: (1) for rock tested under uniaxial conditions, the range of modulus is from about 1 to 100 GN/m2, and the Poisson's ratio range is from 0.02 to 0.73 (0.46 if dilatant values are excluded) with an average value of 0.20; (2) for rock tested under triaxial conditions, the effects of nonlinearity and stress-dependency of the rock modulus are minor with hard, crystalline or homogeneous rock of low porosity, but are significant in porous, clastic or closely jointed rock; (3) anisotropy of the rock modulus is demonstrated mainly by variations in the modulus number or initial stiffness, while the nonlinearity and stress-dependency parameters are fairly constant with sample orientation; (4) nonlinearity and stress-dependency of the rock Poisson's ratio may be significant depending upon the magnitude of stress changes imposed, with the nonlinearity being more significant; and (5) limited data on rock discontinuities indicate that nonlinearity and stress-dependency effects may be quite large.