Estimation of rock joint diameter distribution using numerically generated joint center volume

Lee, Yong-ki; Kim, Jineon; Song, Jae-Joon

doi:10.1007/s10064-022-02764-2

Cited by 3 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the population characteristics of target rock joints should be estimated first to be taken as a reference for determining representative specimens. Herein, the maximum likelihood approach, which has been shown to effectively deal with the effect of variability (Lee et al, 2022), is adopted to estimate the population characteristics. As shown in Section 2, the shear strength of specimens on the field slate rock joint matches the normal distribution.…”

Section: Methodology and Data Processingmentioning

confidence: 99%

Representative sampling method for laboratory testing on shear strength of rock joints

Wang

Rui

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

The direct shear test is commonly used to determine the shear strength of rock joints. The measured shear strength, however, varies greatly with specimen positions due to the heterogeneity of rock joints. As a result, selecting specimens that represent the overall properties of rock joints is usually difficult. This paper aims to investigate the heterogeneity of rock joints and propose a new sampling method for selecting representative specimens. The roughness and shear strength variations of specimens taken from different positions of a natural rock joint were analyzed, and it was discovered that the heterogeneity of rock joint roughness is responsible for the heterogeneity of shear strength. The limitations of the traditional sampling method based on visual judgment were extensively investigated, revealing that shear strength parameters acquired by the traditional method contain large coefficient of variation (COV) values. To acquire trustworthy shear strength parameters, we proposed a representative sampling method based on the maximum likelihood estimation of the overall properties of rock joints. The number of determined representative specimens increases with the increase of normal stress. Representative specimens determined under low normal stresses can likewise exhibit the overall properties of the rock joint when subjected to high normal stresses. The Mohr-Coulomb and a nonlinear criterion were used to validate the derived representative specimens, demonstrating that the proposed method can produce reliable shear strength parameters and shear strength envelopes. Particularly, the determined representative specimens could derive shear strength parameters with relative errors less than 10% and COV values less than 0.1. The proposed method provides a quantitative and reliable tool for determining representative specimens to obtain reliable shear strength of rock joints.

show abstract

Section: Methodology and Data Processingmentioning

confidence: 99%

Representative sampling method for laboratory testing on shear strength of rock joints

Wang

Rui

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…In general, dip direction and dip angle obey uniform distribution or normal distribution, and their distribution may be correlated. 34,35 The joint density often follows a Fish distribution, 36 and the spacing and trace length generally follow a negative exponential distribution or lognormal distribution, [37][38][39][40] but the distribution of the bridge length is rarely considered. The main reasons are that it is difficult to measure the length of the rock bridge in the field survey, and it is difficult to consider the distribution of the rock bridge by the disc model or elliptical model.…”

mentioning

confidence: 99%

A precise modeling method of three‐dimensional discrete fracture network based on rectangular joint model

Kang,

Fu,

Sheng

et al. 2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

As the weak structure and main seepage channel of rock mass, the discrete fracture network (DFN) has a significant influence on the physical and mechanical properties of rock mass. In this paper, based on the rectangular joint model, two algorithms are proposed to realize the precise modeling of the DFN in any polyhedron. First, the equivalence of DFN modeling with the rectangular joint model and the elliptical joint model is theoretically deduced. On this basis, the chain splicing algorithm suitable for the rectangular joint model is proposed, which can generate the DFN model according to the actual distribution of joint spacing, trace, and bridge length. Aiming at the concave boundary in the model domain, the segmentation‐stitching operation is put forward, and the continuity of the joint when passing through the interface is ensured. Finally, the effectiveness of the above algorithm is verified by several simple cases, and the relationship between the size of the geometrical representative elementary volume (REV) and discontinuity parameters is discussed. The results show that when the mean values of the joint distribution parameters are the same, even if the distribution rules are different, the number of joints generated in the same spatial region is approximately equal. The size of the geometrical REV is independent of the spacing and bridge length and is approximately three to five times the mean of the trace. The relevant algorithms and conclusions in this paper can be used as the basis for subsequent rock mass stability analysis and seepage calculation.

show abstract

An improved smooth particle hydrodynamics method for modelling crack propagation in layered rock cells and slopes

Xia

Shi

Zheng

2023

Bull Eng Geol Environ

View full text Add to dashboard Cite

Estimation of rock joint diameter distribution using numerically generated joint center volume

Cited by 3 publications

References 18 publications

Representative sampling method for laboratory testing on shear strength of rock joints

Representative sampling method for laboratory testing on shear strength of rock joints

A precise modeling method of three‐dimensional discrete fracture network based on rectangular joint model

An improved smooth particle hydrodynamics method for modelling crack propagation in layered rock cells and slopes

Contact Info

Product

Resources

About