零或负有效应力及其对岩体物性影响的野外证据
FIELD EVIDENCE OF ZERO OR NEGATIVE EFFECTIVE STRESS AND ITS EFFECT ON PHYSICAL PROPERTIES OF THE ROCK MASS
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摘要: 本文列举了许多野外观测证据,表明向地下岩体中高压注水可以使其內的有效压力变为零或为负值,并指出在上述压力状态下的岩体的某些特性与常压下时相比,其主要变化是,渗透性明显增强,地表的垂直位移率显著增大和岩体的稳定性明显变差。本文还对这些特性变化的原因进行了讨论。Abstract: Many field observational evidences are presented in the present paper, which indicate that the effective pressure within the rock mass can become zero or even negtive. The main changes in physical properties of the rock mass under such stress state as compared with that under normal stress state are as follows: significant increase in permeability, great increase in the rate of vertical displacement of ground surface and poor stability of the rock mass. The possible reasons for the above changes are also discussed in this paper.
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[1] Shankland, T.J and P. M. Halleck, Physical effects to rock under negtive effective Pressure Sound speed and hydraulic diffusivity, 22nd U. S. Symposium on Rock mechanics 111一115,1981.
[2] 汪素云、许忠淮,中国东部大陆的地震构造应力场,地震学报,1985, 7, 17——31.
[3] 郡家全、时振梁、汪素云、环文林,中国及邻区现代构造应力场的区域特征,地震学报,1979, 1, 9——24,
[4] 耶格,J. C., N.G. W.库克著,中国科学院工程力学研究所译,岩石力学基础,272——277, 1981,科学出版社.
[5] 李兴才、喻武星、石汝斌、王鸣、杨若义,一次中尺度波速测量结果,地震学报,1986, 8,334——337.
[6] Bear, J., Hydraulics of Groundwater, 184——189, 1979, New York, McGraw——Hill.
[7] 李兴才、杨若义,岩层滑动是扶余油田套管变形的一种可能机制,石油学报,1987,8,1n2——108.[1] Shankland, T.J and P. M. Halleck, Physical effects to rock under negtive effective Pressure Sound speed and hydraulic diffusivity, 22nd U. S. Symposium on Rock mechanics 111一115,1981.
[2] 汪素云、许忠淮,中国东部大陆的地震构造应力场,地震学报,1985, 7, 17——31.
[3] 郡家全、时振梁、汪素云、环文林,中国及邻区现代构造应力场的区域特征,地震学报,1979, 1, 9——24,
[4] 耶格,J. C., N.G. W.库克著,中国科学院工程力学研究所译,岩石力学基础,272——277, 1981,科学出版社.
[5] 李兴才、喻武星、石汝斌、王鸣、杨若义,一次中尺度波速测量结果,地震学报,1986, 8,334——337.
[6] Bear, J., Hydraulics of Groundwater, 184——189, 1979, New York, McGraw——Hill.
[7] 李兴才、杨若义,岩层滑动是扶余油田套管变形的一种可能机制,石油学报,1987,8,1n2——108.
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