Modeling fractures in rock blasting

Donzé, Frédéric; Bouchez, J.; Magnier, Sophie-Adélaïde

doi:10.1016/s1365-1609(97)80068-8

Cited by 247 publications

(44 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A triangular equivalent loading method commonly used in engineering blasting was used in this model [27], and the loading curve is shown in Figure 9. It is assumed that when the high-energy gas bursts out of the energy release outlet, the loading area of the borehole in the primary impact direction corresponds to the area of the energy release outlets [28]. In Figure 10, the red arrows and the blue arrows represent the impact load of the primary impact direction and the secondary impact direction, respectively.…”

Section: Selection Of Load and Model Parametermentioning

confidence: 99%

Rock Breaking and Dynamic Response Characteristics of Carbon Dioxide Phase Transition Fracturing Considering the Gathering Energy Effect

Zhou

Jiang

et al. 2020

Energies

View full text Add to dashboard Cite

Carbon dioxide phase transition fracturing has been widely used in rock mass excavation under complex environments, and its special rock breaking process shows obvious gathering energy effect. In this paper, the gathering energy effect of this technology is considered and then the impact reduction coefficient is defined and determined. Eventually, a combined method of field tests and numerical simulations is used to study the crack propagation characteristics and spatiotemporal changes of dynamic response. The results show that the cracks grow more and more slowly as time goes by; the peak displacement and peak point velocity in the primary impact direction are both greater than those in the secondary impact direction. The peak point velocity in different directions decreases as the distance from borehole increases and it decays more and more slowly. With the increase of distance from the borehole, the peak effective stress in the primary impact direction constantly decreases. However, it increases first and then decreases in the secondary impact direction. The results mentioned above can provide effective guidance for later experimental research and engineering.

show abstract

Section: Selection Of Load and Model Parametermentioning

confidence: 99%

Rock Breaking and Dynamic Response Characteristics of Carbon Dioxide Phase Transition Fracturing Considering the Gathering Energy Effect

Zhou

Jiang

et al. 2020

Energies

View full text Add to dashboard Cite

show abstract

“…In propellant-based fracturing, it is generally accepted that two types of loading are in operation [7,8]. Early stage damage is driven by dynamic fracture processes.…”

Section: Introductionmentioning

confidence: 99%

“…The relative importance of each of these mechanisms in determining the final fracture pattern clearly depends on the in-situ stress state, and the rate and nature of the loading process, as has been demonstrated by several theoretical and experimental studies. [3,7,8,9,10,11] Given the complexity of the mechanisms that may control fracture initiation and growth, there has been considerable effort applied to numerical modeling of the overall process. Many of these efforts have been motivated by rock blasting for mining applications, and have focused on either discrete element methods (DEM [7]) or continuum-based approaches such as finite element methods (FEM [12]).…”

Section: Introductionmentioning

confidence: 99%

Modeling propellant-based stimulation of a borehole with peridynamics

Panchadhara

Gordon

Parks

2017

International Journal of Rock Mechanics and Mining Sciences

View full text Add to dashboard Cite

A non-local formulation of classical continuum mechanics theory known as peridynamics is used to study fracture initiation and growth from a wellbore penetrating the subsurface within the context of propellant-based stimulation. The principal objectives of this work are to analyze the influence of loading conditions on the resulting fracture pattern, to investigate the effect of in-situ stress anisotropy on fracture propagation, and to assess the suitability of peridynamics for modeling complex fracture formation. It is shown that the loading rate significantly influences the number and extent of fractures initiated from a borehole. Results show that low loading rates produce fewer but longer fractures, whereas high loading rates produce numerous shorter fractures around the borehole. The numerical method is able to predict fracture growth patterns over a wide range of loading and stress conditions. Our results also show that fracture growth is attenuated with increasing in-situ confining stress, and, in the case of confining stress anisotropy, fracture extensions are largest in the direction perpendicular to the minimum compressive stress. Since the results are in broad qualitative agreement with experimental and numerical studies found in the literature, suggesting that peridynamics can be a powerful tool in the study of complex fracture network formation.

show abstract

“…Theoretical studies on rock blasting [3][4][5] generally agrees with the crack extension data; however, the main focus has been on the propagation of the pre-existing cracks under the gas pressure loading and lesser attention has been paid to the initial cracks resulting from stress wave loading. Numerical methods have been employed by several researchers [6][7][8][9][10][11], using various numerical codes to simulate fragmentation process in blasting. Although many significant results have been published, it is far from complete for the numerical study of rock fragmentation.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Dynamic Fracturing of Continuum Rock in Open Pit Mining

Aliabadian¹,

Sharafisafa²,

Nazemi

2013

View full text Add to dashboard Cite

To investigate the dynamic fracture mechanism related to blast-induced borehole breakdown and crack propagation, 2D distinct element commercial code was used. The dynamic stresses, material status and velocity vectors are plotted and shown to evaluate rock mass failure under blast load. This paper focuses on the propagation and dynamic effects of blast waves in continuum rock masses. In order to investigate the effect of high strain rate loading on rock mass failure, a numerical simulation was conducted. The 2D distinct element code was used to model blast load effect on rock failure and stress distribution through the rock mass due to blast wave propagation. The blast loading history was simplified and applied to the blasthole walls. Accordingly, the interaction of explosive energy transferred to the rock mass from the blasthole pressure was examined as a function of time. A Mohr-Coulomb material model was used for host rock to allow for plastic failure calculations. The conducted numerical study describes the role of dynamic stresses in blasting in a qualitative manner. On the other hand, a free face boundary was considered as a common blast operation which is conducted in surface mining.

show abstract

Modeling fractures in rock blasting

Cited by 247 publications

References 17 publications

Rock Breaking and Dynamic Response Characteristics of Carbon Dioxide Phase Transition Fracturing Considering the Gathering Energy Effect

Rock Breaking and Dynamic Response Characteristics of Carbon Dioxide Phase Transition Fracturing Considering the Gathering Energy Effect

Modeling propellant-based stimulation of a borehole with peridynamics

Simulation of Dynamic Fracturing of Continuum Rock in Open Pit Mining

Contact Info

Product

Resources

About