Quantifying topography and closure deformation of rock joints

Xia, Caichu; Yue, Zhufeng; Tham, LG; Lee, C.F.; Sun, Zhenqiu

doi:10.1016/s1365-1609(02)00134-x

Cited by 58 publications

(23 citation statements)

References 27 publications

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“…It is worth noting that the restrictions of the model we developed, as mentioned in section 2, the elastic parameters of rocks will be reduced after acidrock reaction, and these changes cannot yet be described quantitatively using a unified theory (Joel and Pournik, 2011), so the variation of elastic parameters in the model depend on which type of acid system is employed. On the other hand, the mechanical behavior of contacting surfaces has been studied by explicitly modeling the behavior of asperity contacts, mainly includes the normal and shear behavior (Xia et al, 2003), Which induce elastic deformations and inelastic frictional sliding separately, the latter may cause the crushing of asperity (Misra and Marangos, 2014). One study showed that the total contact surface is always proportional to the mechanical load under certain closure stress (Persson, 2001).…”

Section: Results and Discussionresultsmentioning

confidence: 99%

A fractal analysis of fracture conductivity considering the effects of closure stress

Cao

Yuan

et al. 2016

Journal of Natural Gas Science and Engineering

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Section: Results and Discussionresultsmentioning

confidence: 99%

A fractal analysis of fracture conductivity considering the effects of closure stress

Cao

Yuan

et al. 2016

Journal of Natural Gas Science and Engineering

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“…According to tribology, assuming that deformation of asperities of discontinuities under compressive load is linear-elastic, nonlinear characteristics of discontinuities under normal load can be reflected by the modification of the quantity and contact area of asperities. This kind of research was carried out by experts at home and abroad, including Swan, Sun Matsuki, Xia et al [13][14][15][16]. The model brought forward by Swan was effective only in smaller stress range, but unsuitable in overall range.…”

Section: Introductionmentioning

confidence: 99%

A new constitutive law for the nonlinear normal deformation of rock joints under normal load

Guan

Huang

Zhou

et al. 2011

Sci. China Technol. Sci.

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In view of the deviation of the fitting results of the classical exponential model and the hyperbolic model (the BB model) from several experiment data during intermediate stress period, a new constitutive model for the nonlinear normal deformation of rock joints under normal monotonous load is established with flexibility-deformation method. First of all, basic laws of the deformation of joints under normal monotonous load are discussed, based on which three basic conditions which the complete constitutive equation for rock joints under normal load should meet are put forward. The analysis of the modified normal constitutive model on stress-deformation curve shows that the general exponential model and the improved hyperbolic model are not complete in math theory. Flexibility-deformation monotone decreasing curve lying between flexibility-deformation curve of the classical exponential model and the BB model is chosen, which meets basic conditions of normal deformation mentioned before, then a new normal deformation constitutive model of rock joints containing three parameters is established. Two main forms of flexibility-deformation curve are analyzed and specific math formulas of the two forms are deduced. Then the range of the parameters in the g model and the g model and the correlative influence factor in geology are preliminarily discussed. Referring to different experiment data, the validating analysis of the g model and the g model shows that the g model can be applied to both the mated joints and unmated joints. Besides, experiment data can be better fit with the g model with respect to the BB model, the classical exponential model and the logarithm model. rock joints, normal deformation, constitutive model, flexibility Citation: Rong G, Huang K, Zhou C B, et al. A new constitutive law for the nonlinear normal deformation of rock joints under normal load.

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“…Kulatilake et al [11] mentioned significant impacts on the calculated fractal parameters from the input parameter values used in each method, for 2D profiles, and investigated the accuracy of fractal parameters estimated using different methods. Xia et al [12,13,23] presented a study for quantifying both the joint topography characteristics and the load-closure deformation of a rock joint under normal compressive loading condition. This method greatly increases the density of the collected data, the accuracy of the measurements and provides repeatability of results.…”

Section: Introductionmentioning

confidence: 99%