Evaluation of rock size on the mechanical behavior and deformation performance of soil-rock mixture: a meso-scale numerical and theoretical study

Zhang, Pei; Li, Qianqian

doi:10.1007/s12517-021-07854-1

Cited by 9 publications

(3 citation statements)

References 25 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ren et al (Ren et al, 2021) established an equivalent model for fractured rock masses and obtained the relationship between E and seepage parameters. Zhang et al (Zhang and Li, 2021) investigated the macroscopic mechanical behavior of 160 sets of soil rock mixtures with different sizes and discovered the variation of deformation modulus with rock size.…”

Section: Introductionmentioning

confidence: 99%

Study on the size effect of rock elastic modulus considering the influence of joint roughness

Hu,

Wang,

Guo

et al. 2024

Front. Mater.

View full text Add to dashboard Cite

The elastic modulus of rocks is a measure of the ability of rocks to resist elastic deformation. It is related to the size of rocks and can effectively measure the internal physical and mechanical strength of rocks. The development of joint fractures is the main reason for the size effect of rocks. Therefore, exploring the influence of joint roughness on the elastic modulus of rocks of different sizes is of great significance in mining rock mechanics. The article investigates the size effect of joint roughness on elastic modulus of rocks by establishing simulation schemes for 30 working conditions. By analyzing the stress-strain curves of rocks with different roughness and sizes, the deformation and failure patterns of rocks with different sizes were obtained. Research has found that the elastic modulus of rocks is in a power function relationship with joint roughness, while the elastic modulus of rocks is negatively exponentially related to rock size; The characteristic elastic modulus of rocks is in a power function relationship with joint roughness. The above relationships not only reveal the variation of rock elastic modulus with size, but also reveal the influence of joint roughness on elastic modulus, providing important basis for understanding the stability of mining rock engineering.

show abstract

Section: Introductionmentioning

confidence: 99%

Study on the size effect of rock elastic modulus considering the influence of joint roughness

Hu,

Wang,

Guo

et al. 2024

Front. Mater.

View full text Add to dashboard Cite

show abstract

“…Many researchers have studied the mechanical properties and failure mechanism of the SRM from different points of view by using experimental and numerical methods, including meso-structural characteristics (block size, position, content, shape etc.) [3,[5][6][7], strength parameters [8][9][10][11], and shear strength [9,12,13]. Despite the fact that these research efforts used to obtain the macromechanical responses of the SRM, it is difficult to thoroughly reveal the meso-scale mechanical properties of the SRM.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Spatial Variability of SRM Based on Real-Time CT and the DIC Method Under Uniaxial Loading

Zhang

et al. 2022

Front. Phys.

View full text Add to dashboard Cite

Soil and rock mixture (SRM) consists of high-strength rock blocks and small-grained soils, which depend seriously on the rock size and the heterogeneity of structure. Because of inhomogeneous cementation between rock blocks, complex granulometric composition, and random distribution of rock blocks, these SRMs usually cause problems. Investigation of the localized deformation is critical for successful engineering designs, engineering safety assessment. In this work, uniaxial compression testing on the SRM with a rock block percentage of 40% (mass ratio) is performed under real-time computed tomography (CT) combined with digital image correlation (DIC) technology. Based on radial strain fields and shear fields, heterogeneity of strain fields and rock block motion is analyzed quantitatively by semi-variance. The results show that rock block is the main factor controlling the shear band geometry distribution. A localization strain band usually occurs along the soil and rock interfaces. From the experimental results by the DIC method, the damage factor is presented to describe the damage evolution of the SRM under uniaxial compression. The method proposed in this study can be used to quantitatively analyze the deformation characteristics of the SRM sample.

show abstract

“…However, the contrary conclusion has also been proposed, and the decrease in strength of S-RM can be found as the particle size increases. Zhang and Li (2021) compared the mechanical behaviors of S-RM samples with various rock sizes using the mesoscale numerical method and found that the sample with the smaller rock size presented a greater peak strength. The negative correlation between strength and particle size has also been suggested by Kang (2016) and Hamidi et al (2012).…”

Section: Introductionmentioning

confidence: 99%

A prediction method for the uniaxial compressive strength of the soil-rock mixture considering the effect of the particle size

Zhu

Yuan

et al. 2022

Preprint

View full text Add to dashboard Cite

The reasonable prediction of mechanical parameters of the soil-rock mixture (S-RM) is crucial to build an engineering structure on the deposit slope. As a typical multiphase geomaterial, the emergence of rock blocks of various sizes destroys the integrity of the soil matrix and results in the complex and varied mechanical properties because of its interaction with the soil matrix. Because of the size effect, which is caused by the size restriction of traditional test apparatus, it is more challenging to measure the precise mechanical parameters of S-RM. This study proposed an approach to predicting the uniaxial compressive strength (UCS) of S-RM taking the particle size effect into account. The impact of the particle size on the mechanical behaviors of S-RM under various volumetric rock block proportion (VBP) conditions was discussed using the particle flow discrete element method from both a macroscopic and mesoscopic view. The parameter “Am” was used to describe the decreasing rate of UCS with various VBPs, and a quantitative description to predict the parameter “Am” of S-RM with various maximum particle sizes was proposed. A method to predict the UCS value of S-RM with various VBPs was conducted while taking the influence of size effect into account using the parameter “Am” and the UCS of the soil matrix.

show abstract

Evaluation of rock size on the mechanical behavior and deformation performance of soil-rock mixture: a meso-scale numerical and theoretical study

Cited by 9 publications

References 25 publications

Study on the size effect of rock elastic modulus considering the influence of joint roughness

Study on the size effect of rock elastic modulus considering the influence of joint roughness

Analysis on Spatial Variability of SRM Based on Real-Time CT and the DIC Method Under Uniaxial Loading

A prediction method for the uniaxial compressive strength of the soil-rock mixture considering the effect of the particle size

Contact Info

Product

Resources

About