Cavity Expansion in Rock Masses Obeying the “Hoek–Brown” Failure Criterion

Gharsallaoui, Haythem; Jafari, Mustafa; Holeyman, Alain

doi:10.1007/s00603-019-01920-7

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…It is widely accepted that the small contact zone will lead to plastic failure of rock near the tip of the pick and form a crushed zone. The pressure within the crushed zone increases as the pick cuts forward and causes the initiation of the cracks on the boundary of the crushed zone similar to that in cavity expansion theory [52][53][54][55][56][57]. Thus, we propose an analytical model based on Evans' tensile breakage model.…”

Section: Conception Of the Ceit Modelmentioning

confidence: 93%

“…The shape of the diagram of the cutting force versus cutting distance is zigzag [31,38,[47][48][49][50][51]. The crushed zone generated near the pick tip, as shown in Figure 1b, is similar to the core region and plastic region of the cavity expansion model [52][53][54][55][56][57]. Therefore, the cavity expansion theory was used for analyzing the fracture mechanism of rock indentation by tools in [53,54,57].…”

Section: Introductionmentioning

confidence: 99%

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An Analytical Model for Rock Cutting with a Chisel Pick of the Cutter Suction Dredger

Ouyang

Yang

Chen

et al. 2020

JMSE

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Cutter suction dredgers are important pieces of rock excavation equipment in port and waterway construction. It is valuable but difficult to properly estimate the cutting force on the chisel pick of the cutter suction dredger. In this paper, an analytical model, called the crushed zone expansion induced tensile failure model (CEIT model), is proposed for rock cutting with a chisel pick in order to predict the peak cutting force (Fc) more accurately. First, a review of the existing models for rock cutting with a chisel pick is presented. Next, based on the tensile breakage theory, cavity expansion theory and some hypotheses, the mathematical formula of the CEIT model is obtained. Different from that in the previous models, the effect of the rock on both sides of the chisel pick on Fc, defined as the sidewall effect is considered in the CEIT model. Then, the predicted Fc by the CEIT model is compared with the predicted Fc by existing theoretical models and experimental results to check the validity of the CEIT model. The results show that the CEIT model can well capture the relationships of Fc to the cutting parameters, including cutting width, cutting depth, and rake angle, and can predict the experimental results much better than the existing models. Finally, the sidewall effect and its influence factors according to the CEIT model are discussed.

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Section: Conception Of the Ceit Modelmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

An Analytical Model for Rock Cutting with a Chisel Pick of the Cutter Suction Dredger

Ouyang

Yang

Chen

et al. 2020

JMSE

View full text Add to dashboard Cite

show abstract

“…Cavity expansion model is a simple but effective tool for mechanical analysis in rock mechanics and geotechnical engineering, which has been widely used in the evaluation of cone penetration test, 1–3 well bore stability, 4–5 pile bearing capacity, 6–8 tunnel stability, 5,9–10 etc. Many cavity expansion solutions have been proposed after Vesic, 11 who proposed cavity expansion solution in infinite soil mass to evaluate bearing capability of pile foundation.…”

Section: Introductionmentioning

confidence: 99%

“…With the rapid development of underground construction, petroleum engineering and the urgent need of pile installing in rock stratum, cavity expansion solutions were also derived for rock medium 4,6–9,35 . Most solutions mentioned above were derived for cavity contraction problem in order to evaluate borehole stability, 4,35 tunnel stability, 9,36 etc.…”

Section: Introductionmentioning

confidence: 99%

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Spherical cavity expansion in porous rock considering plasticity and damage

Huang¹,

Liang²,

et al. 2021

Num Anal Meth Geomechanics

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In rock engineering, damage evolution upon loading imposes significant impacts on the stiffness of rock mass and its deformation characteristics. In order to investigate the influence of both damage and plasticity on cavity expansion, a plastic damage solution is derived for undrained spherical cavity expansion in rock medium. For the consideration of plasticity‐damage, Modified Cam‐Clay (MCC) model is selected as the plasticity driver, a damage evolution criterion is adopted and coupled with MCC. The coupled damage MCC model is validated against experimental data in the literature. The proposed cavity expansion solution with the consideration of plasticity damage is verified through a classic solution in literature. The role of damage in undrained spherical cavity expansion is investigated by studying the spatial variations of effective stress, pore pressure and damage for cases with different stress ratios. Distribution of cavity expansion induced plastic and damage zones for cases with different stress ratios are also reproduced and discussed. Cavity expansion results show that, the damage zone should be considered for engineering application as the plastic zone is affected due to the damage evolution. In addition, the stability (e.g., radial stress) of rock mass is overestimated in classical solution without the consideration of damage zone.

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Cavity expansion analysis of normal indention of rocks with lateral confinement

Cheng

Yang

et al. 2022

Computers and Geotechnics

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Cavity Expansion in Rock Masses Obeying the “Hoek–Brown” Failure Criterion

Cited by 9 publications

References 25 publications

An Analytical Model for Rock Cutting with a Chisel Pick of the Cutter Suction Dredger

An Analytical Model for Rock Cutting with a Chisel Pick of the Cutter Suction Dredger

Spherical cavity expansion in porous rock considering plasticity and damage

Cavity expansion analysis of normal indention of rocks with lateral confinement

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