Three-dimensional Reconstruction and Growth Factor Model for Rock Cracks under Uniaxial Cyclic Loading/Unloading by X-ray CT

Wang, Chunlai; Gao, Ansen; Shi, Feng; Hou, Xiaolin; Ni, Pengpeng; Ba, Deyang

doi:10.1520/gtj20170407

Cited by 14 publications

(4 citation statements)

References 36 publications

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“…However, the CT image is presented in grayscale, which is not as clear as the X-ray image. However, it has obvious advantages in terms of detecting the development process of microscopic damage in the internal structure of samples [62,63].…”

Section: Computed Tomography (Ct)mentioning

confidence: 99%

A Review of the Evolution Characteristics and Argillization of Clay Interbeds in Rockslides

Song,

Song

2023

Applied Sciences

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Weak interlayers in rockslides often become the controlling factor for slope deformation due to their poor physical properties and tendency to undergo argillization. Achieving a comprehensive understanding of the weak interlayers will help us comprehend the mechanism of rock slope failure and protect people’s property. Some weak interlayers will develop into clay interbeds after tectonic activity and long-term groundwater action. A comprehensive review of clay interbeds includes a discussion on the formation conditions, the governing factors of the argillization process, and the investigation methods. The clay minerals in clay interbeds, illite, montmorillonite, and Kaolinite, play a major role in the acceleration of the argillization process. The argillization process can be observed through scanning technology and investigated using nonlinear dynamics, statistics, and numerical modeling methods, which may result in limitations for extracting parameters. It is necessary to conclude a unified evaluation standard to find the basic commonness during the argillization process of clay interbeds. It would be a future trend to establish the quantitative relationships among the mechanical strength, micro-structure and content of clay minerals of the clay interbeds during the argillization process.

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Section: Computed Tomography (Ct)mentioning

confidence: 99%

A Review of the Evolution Characteristics and Argillization of Clay Interbeds in Rockslides

Song,

Song

2023

Applied Sciences

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“…In the process of coal mining, the bottom rock is disturbed by mining damage, the damage situation is mainly divided into the formation of fissures, pores, holes, the formation of damage damage damage area without obvious defects formed, but the strength has changed (Wang et al 2018a;Parastatidis et al 2021;Wang et al 2018b;Zhang JW et al 2021). Many experts and scholars have carried out a lot of research work for the rock containing fissures, and many research results have been achieved.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the deterioration law of saturated and dry porous rocks

Zheng,

Pang,

Liu

2024

Preprint

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The coal seam floor is highly susceptible to the formation of hole defects after mining disturbance. And the destabilization of rocks containing hole defects and water saturation can affect the risk of burst water in the floor. Based on this, experimental studies were carried out on saturated and dry three-hole sandstone specimens using conventional triaxial compression experiments. The results show that after saturation with water, the compressive strength of the saturated specimens decreases with the increase of the surrounding pressure compared with the dry specimens. The weakening effect of water on the strength of the porous rock was 20.19% on average. The maximum degradation of compressive strength of saturated specimens is 61.31% greater than that of dry specimens by 50.15%. The weakening effect of water on the three-hole specimens is greater. The fracture damage form formed on the specimen surface under low perimeter pressure (2 ~ 10MPa) is dominated by inclined shear fracture and splitting fracture, which is mainly subjected to compression shear. The saturated and dry three-hole specimens under medium-perimeter pressure (18 ~ 26MPa) indicate that the number of fractures formed is low. The saturated and dry specimens indicate the formation of parallel or coplanar fracture system. The specimens indicate the formation of fractures subject to shear, tension and shear expansion damage. The saturated and dry three-hole specimens under high perimeter pressure (34–42 MPa) form damage damage zones around the holes, which are significantly damaged by tension and expansion. The damage form of the specimen is mainly shear expansion and tension damage.

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“…The distribution of the cracks in rocks has been realized from different spatial dimensions, such as the 2D crack space assessment of cracks on the rock surface, including digital image correlation technology [3], infrared thermal imaging technology [4], optical observation technology [5], etc. There are methods for 3D crack space assessment of cracks inside the rock, including computer tomography [6], acoustic emission (AE) [7], etc. They demonstrated the power of acquiring crack distribution from light waves, electromagnetic waves, and sound waves.…”

Section: Introductionmentioning

confidence: 99%

Spatial Characterization of Single-Cracked Space Based on Microcrack Distribution in Sandstone Failure

et al. 2023

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To further understand the rock damage zone, an approach based on microcrack distribution was proposed to characterize the crack space of rock specimens in this research. Acoustic emission (AE) technology was utilized on sandstone to obtain the spatial distribution of microcracks in which uniaxial compression forms the single-cracked fracture. The proposed theoretical distribution pattern space (TDPS), 3D convex hull, and the minimum volume enclosing ellipsoid (MVEE) algorithms were adopted to analyze the geometric features of the crack space. It was found that the 3D convex hull method returned the smallest results in both area and volume of the crack space, and the largest results were provided by the proposed TDPS method. The difference between the results of the proposed TDPS method and the MVEE method became smaller after 85%. The deviation angle of the principal axis of the cracked space gradually decreased as the spatial scale decreased, while the other two major axes exhibited a tendency to increase at the 65% scale. The results indicate that a spatial scale from 65% to 85% is a reliable range for the characterization of crack space.

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Three-dimensional Reconstruction and Growth Factor Model for Rock Cracks under Uniaxial Cyclic Loading/Unloading by X-ray CT

Cited by 14 publications

References 36 publications

A Review of the Evolution Characteristics and Argillization of Clay Interbeds in Rockslides

A Review of the Evolution Characteristics and Argillization of Clay Interbeds in Rockslides

Experimental study on the deterioration law of saturated and dry porous rocks

Spatial Characterization of Single-Cracked Space Based on Microcrack Distribution in Sandstone Failure

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