Analytical and numerical modeling of rock blasting operations using a two-dimensional elasto-dynamic Green's function

Lak, Meysam; Marji, Mohammad Fatehi; Bafghi, Alireza Yarahmadi; Abdollahipour, Abolfazl

doi:10.1016/j.ijrmms.2018.12.022

Cited by 45 publications

(5 citation statements)

References 45 publications

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“…When the shock wave propagates to a certain distance, it becomes a compressive stress wave, due to its energy attenuation [30]. At this time, the peak value of the radial stress of the compressive stress wave is less than the value of the dynamic compressive strength of the rock, and it cannot cause the crushing failure of the rock, but instead the radial displacement of rock.…”

Section: Results Of Blasting Model Testmentioning

confidence: 99%

Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load

Huang

et al. 2021

Sustainability

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Rock blasting during tunneling has shown that the rock failure in high in situ stress environments is different from that in low in situ stress conditions or with a shallow rock mass. In particular, the propagation direction of the main crack induced by blasting is greatly affected by the in situ stresses. In order to study the law of crack propagation in rock during blasting under the conditions of an initial in situ stress, a transparent material that conformed to the mechanical properties of hard rock was used to carry out a similar model rock blasting test, under a unidirectional load. The results show that initial stress has a great influence on the propagation number, length, and direction of the main radial cracks. The specific performances were as follows: under the action of an equal confining pressure load, the longest main radial crack in the model specimen propagated along the diagonal direction, and the number and length of the main radial cracks propagated decreased with the gradual increase of confining pressure stress; in addition, the diameter of the circumferential cracks also decreased with the increase of stress, and there was a negative correlation between them. In view of the phenomenon where the longest main radial crack propagated along the diagonal direction in the model test, a mechanical model was established in this study to explain this process. This is of practical significance for understanding the mechanism of rock fracture when blasting with high in situ stresses.

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Section: Results Of Blasting Model Testmentioning

confidence: 99%

Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load

Huang

et al. 2021

Sustainability

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“…When a rock is idealized as a continuous medium, continuum-based approaches such as FEM [75][76][77][78][79][80][81] or FDM [82][83][84][85][86][87] are usually employed to simulate the model. However, the rock is modeled as a set of structural units (such as springs, beams, etc.)…”

Section: Numerical Approachmentioning

confidence: 99%

Estimation of Damage Induced by Single-Hole Rock Blasting: A Review on Analytical, Numerical, and Experimental Solutions

et al. 2020

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This paper presents a review of the existing models for the estimation of explosion-induced crushed and cracked zones. The control of these zones is of utmost importance in the rock explosion design, since it aims at optimizing the fragmentation and, as a result, minimizing the fine grain production and recovery cycle. Moreover, this optimization can reduce the damage beyond the set border and align the excavation plan with the geometric design. The models are categorized into three groups based on the approach, i.e., analytical, numerical, and experimental approaches, and for each group, the relevant studies are classified and presented in a comprehensive manner. More specifically, in the analytical methods, the assumptions and results are described and discussed in order to provide a useful reference to judge the applicability of each model. Considering the numerical models, all commonly-used algorithms along with the simulation details and the influential parameters are reported and discussed. Finally, considering the experimental models, the emphasis is given here on presenting the most practical and widely employed laboratory models. The empirical equations derived from the models and their applications are examined in detail. In the Discussion section, the most common methods are selected and used to estimate the damage size of 13 case study problems. The results are then utilized to compare the accuracy and applicability of each selected method. Furthermore, the probabilistic analysis of the explosion-induced failure is reviewed using several structural reliability models. The selection, classification, and discussion of the models presented in this paper can be used as a reference in real engineering projects.

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“…The reservoir matrix flow model and fracture flow model are, respectively, two-dimensional and one-dimensional models. In the construction of the flow exchange model between fractures and the reservoir matrix, an embedded discrete fracture model was employed [29,30]. This model, when addressing the flow exchange between fractures and the reservoir, offers significant advantages.…”

Section: Three-dimensional Reservoir-fracture Productivity Coupling M...mentioning

confidence: 99%

Optimization Simulation of Hydraulic Fracture Parameters for Highly Deviated Wells in Tight Oil Reservoirs, Based on the Reservoir–Fracture Productivity Coupling Model

Mao,

Huang,

et al. 2024

Processes

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The production potential of highly deviated wells cannot be fully realized by conventional acid fracturing, as it can only generate a single fracture. To fully enhance the productivity of highly deviated wells, it is necessary to initiate multiple fractures along a prolonged well section to ensure the optimal number of fractures, thereby maximizing the economic returns post-stimulation. Thus, the number of fractures is a crucial parameter in the acid fracturing design of highly deviated wells. Considering factors such as the random distribution of natural fractures within the reservoir and interference between fractures during production, and, based on the oil–water two-phase flow equation, a three-dimensional reservoir–fracture production coupling model and its seepage difference model are established to simulate the production performance of highly deviated wells under varying conditions, including the number of fractures, fracture spacing, and conductivity parameters. A numerical model for the number of acid fracturing fractures in highly deviated wells is also established, in conjunction with an economic evaluation model. The simulation results indicate that the daily oil production of highly deviated wells increases with the increase in fracture number, fracture conductivity, fracture length, and reservoir permeability. However, over time, the daily oil production gradually decreases. Similarly, the cumulative production also increases with these parameters, but shows a downward trend over time. By conducting numerical simulations to evaluate the productivity and economy of highly deviated wells post-acid fracturing, it is determined that the optimal number of fractures to achieve maximum efficiency is six. The reliability of this result is confirmed by the pressure distribution cloud map of the formation after acid fracturing in highly deviated wells.

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Analytical and numerical modeling of rock blasting operations using a two-dimensional elasto-dynamic Green's function

Cited by 45 publications

References 45 publications

Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load

Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load

Estimation of Damage Induced by Single-Hole Rock Blasting: A Review on Analytical, Numerical, and Experimental Solutions

Optimization Simulation of Hydraulic Fracture Parameters for Highly Deviated Wells in Tight Oil Reservoirs, Based on the Reservoir–Fracture Productivity Coupling Model

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