A novel observation method for determining the crack stress thresholds of rock based on Hooke's law

Du, Ruifeng; Pei, Xiangjun; Jia, Junbo; Zhang, Xiaochao; Gao, Meiben; Li, Tiantao; Zhang, Guohua

doi:10.1111/ffe.13306

Cited by 5 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the generalized Hooke's law, combined with the conventional triaxial stress state, the elastic strain of the rock is [28]:…”

Section: Stress-strain Curves and Characteristic Stressesmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Deep Granite under Gradient-Confining Pressure

Qin,

Zhao,

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

In deep layers, the complex geological environment is characterized by high temperature and high stress which causes marked differences in the mechanical properties of granite compared to those of granite in shallow areas. To investigate the mechanical properties of deep granite, this paper utilizes conventional triaxial compression tests to determine the various mechanical properties and failure modes of deep granite under different confining pressures. The findings indicate that the elastic modulus, Poisson’s ratio, and peak strength of deep granite display greater dispersion than those of shallow granite under the influence of confining pressure. Based on the stress-strain curve, various characteristic stresses of deep granite under different confining pressures are calculated, and a distinct exponential function relationship exists between the characteristic stresses and the confining pressure. Furthermore, the finite element numerical simulation software Abaqus is employed to simulate the conventional triaxial compression of granite under different confining pressures, thereby revealing the stress and deformation evolution process of granite during the compression process. This research unveils the mechanical properties of deep granite under gradient-confining pressure, which can offer crucial theoretical evidence and data to support engineering applications in relevant fields.

show abstract

“…According to the generalized Hooke's law, combined with the conventional triaxial stress state, the elastic strain of the rock is [28]:…”

Section: Stress-strain Curves and Characteristic Stressesmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Deep Granite under Gradient-Confining Pressure

Qin,

Zhao,

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The holes and cracks in a rock seriously affect the mechanical properties of the rock [1][2][3][4]. The expansion of cracks leads to rock instability and damage, which ultimately affects the safe and efficient operation of coal mines [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Impact Tendency and Sensitivity of Fractured Rock with Different Crack Arrest Measures

Liu

Xiao

et al. 2022

Sustainability

View full text Add to dashboard Cite

Crack propagation leads to rock instability and failure, which seriously influence the safe and efficient operation of coal mines. According to the characteristics of fracture development and expansion, this paper takes a fractured rock with different crack numbers as the research background and studies the effects of the grouted arrest measure, anchored crack arrest measure, and grouted anchored arrest measure on the mechanical properties, energy evolution, crack expansion, and progressive instability of the fractured rock. The sensitivity of different crack arrest measures to the peak strength, elastic modulus, total crack number, and impact tendency of the fractured rock are analyzed based on the sensitive percentage. The experimental results show that the more cracks in the rock, the greater the increase of peak stress of grouted rock and grouted anchored rock, and the smaller the increase of peak stress of anchored fractured rock. With the increase of the crack number, the total crack number in anchored fractured rock specimens gradually decrease, the total crack number in grouted rocks, and grouted anchored rock specimens gradually increase. The anchored fractured rock with more cracks produces a lower total crack number when it is destroyed. The grouted rock and grouted anchored rock with more cracks produce a higher total crack number when it is destroyed. The pre-peak energy of anchored single-fractured rock is larger, the pre-peak energy of grouting multi-fractured rock is larger, and the grouted rock has a strong impact tendency. The grouted arrest measure is an important sensitive parameter to the impact energy index; the anchored crack arrest measure is the primary sensitive parameter to the peak stress, elastic modulus, and total crack number; and the grouted anchored arrest measure is an important sensitive parameter to the elastic modulus. The research results of this paper provide some guidance on the selection of crack arrest parameters and scheme design in practical rock engineering.

show abstract

“…The essence of the deformation and failure process of rock is continuous generation, evolution, and expansion of internal cracks (Feng et al 2021;Cao et al 2020;Wang et al 2020). The study of crack initiation, crack penetration, and failure characteristics in the rock is one of the key topics of rock fracture mechanics, which has important theoretical and practical significance for the study of roadway surrounding rock stability, slope landslide prevention, and tectonic earthquake prediction (Du et al 2020;Wu et al 2020). Therefore, it is of great theoretical significance and engineering value to study the sensitivity of different crack characteristics to rock mechanical properties and failure characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation study on the influence of crack characteristics on mechanical properties and impact failure of rock

Chen

Qin

et al. 2021

Arab J Geosci

View full text Add to dashboard Cite

The rock mass in nature have different degrees of crack development. The different crack characteristics affect the mechanical properties and stability of the rock mass. This paper uses PFC simulation software to perform uniaxial compression tests on rock specimens with different crack characteristics and analyzes the influence of the crack characteristics on the mechanical property, impact energy index, and failure characteristics. The sensitivity analysis is used to analyze the influence degree of crack characteristics. It is concluded that the peak strength is directly proportional to the crack angle and inversely proportional to the crack length, the crack number, and the crack width. The peak strain is directly proportional to the crack angle, the crack number, and the crack width and is inversely proportional to the crack length. The impact energy index of rock specimen increases gradually with the crack angle, crack number, and crack width. The influence degree of crack characteristics is divided into four grades by sensitivity analysis. The crack angle has a more significant influence on the peak stress, peak strain, and impact energy index, and the crack width has a more minor influence on the peak stress and peak strain. The research results can provide the theoretical basis and guidance for preventing the instability and failure of the rock mass with different crack characteristics. KeywordCrack characteristic • Mechanical property • Progressive instability • Impact energy index • Sensitivity analysis * Tan Li

show abstract

A novel observation method for determining the crack stress thresholds of rock based on Hooke's law

Cited by 5 publications

References 20 publications

Experimental Study on the Mechanical Properties of Deep Granite under Gradient-Confining Pressure

Experimental Study on the Mechanical Properties of Deep Granite under Gradient-Confining Pressure

Analysis of Impact Tendency and Sensitivity of Fractured Rock with Different Crack Arrest Measures

Numerical simulation study on the influence of crack characteristics on mechanical properties and impact failure of rock

Contact Info

Product

Resources

About