Considering the Effect of Block-to-Matrix Strength Ratio on Geomechanical Parameters of Bimrocks

Mahdevari, Saeed; Moarefvand, Parviz; Mohammadzamani, Danial

doi:10.1007/s10706-020-01304-7

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…A two-dimensional numerical model was used in the study with a height-to-diameter ratio of 1:1. Simulation plans (Mahdevari et al, 2020) are shown in Table 1.…”

Section: Numerical Simulation Plansmentioning

confidence: 99%

“…Displacement loading was applied along the upper surface of the model with a loading increment of 0.01 mm, and no load was applied on both sides of the model (Mahdevari et al, 2020). The rock mechanics parameters used in the simulation are shown in Table 2.…”

Section: Numerical Simulation Plansmentioning

confidence: 99%

“…In addition, scholars have also carried out research on the size effect of the secant modulus from the perspectives of rock aspect ratio, particle size, and joint length, for example, Sun et al (2022) studied the aspect ratio effect of the dynamic deformation modulus of coal and found that the sensitivity of the secant modulus strain rate in the plastic section of the specimen with a large aspect ratio is stronger than that of the specimen with a small aspect ratio. Mahdevari et al (2020) studied the effect of bulk size and bulk volume ratio on the deformation modulus by making large-scale physical samples. Davarpanah et al (2020) studied the effect of the modulus ratio on the rock modulus and explored the validity of the mathematical model proposed by Zhu (2021) by PFC software to obtain the stress-strain curves of the substitute materials at all levels and found that there was an exponential correlation between the ratio of the secant modulus and the maximum particle size D of the sample.…”

Section: Introductionmentioning

confidence: 99%

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Study on the size effect of the secant modulus of rocks containing multiple parallel joints

Zhang

Guo

et al. 2022

Front. Mater.

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The secant modulus of the rock reflects the stiffness of the rock and the ability to resist deformation. There are significant differences in the secant modulus of the rock due to the different numbers of joints in the rock and the change in rock size. Therefore, it is important to obtain effectively the secant modulus of rocks with the number of parallel joints for evaluating rock deformation. In this study, the method of regression analysis is used, and 10 sets of numerical plans are set up to discuss the influence of a number of parallel joints and rock size on the secant modulus. The results show that the secant modulus decreases with the increase in a number of parallel joints, and the curve is a power function. The secant modulus decreases when the rock size increases, and the curve is an exponential function. The characteristic secant modulus and characteristic size decrease with the increase in the number of parallel joints, and their curves are an exponential function. The specific forms of these relationships are given in the article. The establishment of these relationships realizes the prediction and calculation of the rock secant modulus with the number of parallel joints, which provides a guiding significance for the rock deformation analysis.

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“…A two-dimensional numerical model was used in the study with a height-to-diameter ratio of 1:1. Simulation plans (Mahdevari et al, 2020) are shown in Table 1.…”

Section: Numerical Simulation Plansmentioning

confidence: 99%

Section: Numerical Simulation Plansmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the size effect of the secant modulus of rocks containing multiple parallel joints

Zhang

Guo

et al. 2022

Front. Mater.

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show abstract

“…Therefore, it is necessary to understand their strength characteristics and failure behaviors. However, due to many influencing factors such as rock block proportion [ 7 , 8 ], rock block size [ 9 , 10 ], rock block shape [ 11 , 12 ], matrix strength [ 13 ], matrix rock strength ratio [ 14 ], and the block–matrix interface [ 15 ], the research of bimrocks has always been a hot and difficult problem.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of the Effects of Block Proportion on Bimrocks, Considering Different Block-to-Matrix Strength Ratios

Hu,

Sun,

Sun

et al. 2024

Materials

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The rock block proportion is one of the most important factors affecting the mechanical properties of bimrocks. Under different block-to-matrix strength ratios, the influence of rock block proportion is different. To explore the influence of rock block proportion on the mechanical properties of specimens under different block-to-matrix strength ratios, a new indoor test method for making bimrocks was proposed. A uniaxial compression test and a direct shear test were carried out on specimens with different rock block proportions. The results show that this method can control the block-to-matrix strength ratio well, and the influence of rock block proportion is obviously different under different block-to-matrix strength ratios. The strong matrix sample will decrease significantly after reaching the peak compressive strength, while the weak matrix will decrease slowly after reaching the peak strength. The rock block proportion is negatively correlated with the uniaxial compressive strength of strong matrix samples (the reduction was 12.53%) and is positively correlated with the uniaxial compressive strength of weak matrix samples as a whole, but it changes when block proportion is more than 50%. With the increase in normal stress and rock block proportion increases from 30% to 60%, the shear failure zone of the weak matrix sample increases, and the cracks are inclined, while the strong matrix sample has more secondary cracks. The results of this study also show that the effect of volumetric block proportion (VBP) on the internal friction angle and cohesion of the sample is less related to the block-to-matrix strength ratio.

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Study on uniaxial compressive strength of double matrix bimrocks considering different block proportions

Sun

et al. 2023

Bull Eng Geol Environ

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Considering the Effect of Block-to-Matrix Strength Ratio on Geomechanical Parameters of Bimrocks

Cited by 5 publications

References 18 publications

Study on the size effect of the secant modulus of rocks containing multiple parallel joints

Study on the size effect of the secant modulus of rocks containing multiple parallel joints

An Experimental Investigation of the Effects of Block Proportion on Bimrocks, Considering Different Block-to-Matrix Strength Ratios

Study on uniaxial compressive strength of double matrix bimrocks considering different block proportions

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