Numerical simulation of rock mass blasting using particle flow code and particle expansion loading algorithm

Zhang, Zehua; Gao, Wenle; Li, Kunpeng; Li, Baojie

doi:10.1016/j.simpat.2020.102119

Cited by 31 publications

(9 citation statements)

References 14 publications

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“…The SPH belongs to meshless method, and it can be coupled with other methods (the finite element method and the boundary element method) to simulate the explosion wave and bubble movement in underwater blasting. The discrete element method (DEM) is also employed to analyze the dynamic fragmentation, throwing, and the accumulated shape of rock mass under blast load [14][15][16][17] .…”

Section: Experiments and Simulation Of Block Motion In Underwater Ben...mentioning

confidence: 99%

Experiments and simulation of block motion in underwater bench blasting

Liang

Chen

2023

Sci Rep

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The blasting mechanism underlying drilling and blasting of underwater rocks, as an important component of the engineering blasting technology, has not been systematically studied. Laboratory model experiments are expensive and take a long time, while field tests fail to obtain timeous breakage and accumulation effects of underwater blasting, and may even be impossible. Considering this, a model experiment of underwater concrete bench blasting was designed, and the motion of blasted blocks was observed and evaluated with a high-speed camera. Then, numerical simulation was conducted based on Fluent and an engineering discrete element method coupling program complied using the application programming interface. Results show that the blocks form a bulge in the underwater blasting experiment under action of blast waves and expansion in the first period of bubble pulsation. Then, some blocks shrink in the first period of bubble pulsation. As the charge increases, the blast load exerts larger disturbance on the block group, resulting in significant motion of blasted blocks along the vertical direction. At the same time, the horizontal displacement of blasted blocks in the throwing direction increases.

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Section: Experiments and Simulation Of Block Motion In Underwater Ben...mentioning

confidence: 99%

Experiments and simulation of block motion in underwater bench blasting

Liang

Chen

2023

Sci Rep

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“…Element Method e two-dimensional particle flow code (PFC2D) is mainly based on numerical methods, using circular particle elements to simulate the motion and interaction of the particle medium to perform numerical simulation analysis, then the simulation results of local elements are used to research the constitutive model of overall material calculation [30]. Furthermore, the explicit difference algorithm and the mesoscopic mechanics in the discrete element theory were used to analyze the overall mechanical properties of the materials.…”

Section: Numerical Simulation In Discretementioning

confidence: 99%

Study on Mesoscopic Mechanics of Recycled Asphalt Mixture in the Indirect Tensile Test

Sheng

Jia

Chen

et al. 2020

Mathematical Problems in Engineering

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Reclaimed asphalt pavement (RAP) mainly contains asphalt binder and aggregates, and the RAP materials used in paving roads could save virgin materials. This paper studied the following: asphalt mixture with different RAP material contents was prepared; then the indirect tensile test was carried out, and the mesoscopic model of the recycled asphalt mixture was reconstructed digitally. Discrete element method (DEM) of indirect tensile test was carried out to analyze the mechanical properties of recycled asphalt mixture in mesoscopic perspective. The results showed that there were some gaps between the simulation result of the digital specimen model and the test value of the recycled asphalt mixture, but the velocity vector and the law of force chain development of the recycled asphalt mixture could be explained in mesoscopic perspective. It proved that the virtual simulation test of the mechanical test was effective. The damage process of recycled asphalt mixture was analyzed in mesoscopic perspective, and the unification of mechanical response and macroscopic appearance was completed. Meanwhile, the simulation method of mesoscopic mechanics was an effective supplement to traditional tests, and guided tests method theoretically.

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“…Some scholars have studied the effect of blasting rock breakage of a single rock body under different blasting conditions, which provides specific theoretical support for improving blasting efficiency [10][11] . Yuan et al 12 took the micro differential blasting of a single rock body as an analytical angle and found that the explosion delay time has a specific effect on the degree of rock destruction; The degree of rock destruction is closely related to the explosive stress wave and the blast gas, which contributes to rock fragmentation near the blast hole, while the blast gas further increases the fissure zone area 13 . Zhang et al 14 verified the reasonableness of the blast simulation method by using the on-site blasting test as a control.…”

Section: Introductionmentioning

confidence: 99%

Analysis of blasting characteristics of interbedded rock mass based on particle expansion method

Xu,

Xie,

Liu

et al. 2023

Preprint

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In engineering, blasting is often used to achieve engineering purposes. Still, more studies are limited to a single rock layer, and there are few details on complex rock layers, such as interbedded rock bodies. This paper analyses the effects of the blasting environment, layer thickness, and inclination angle on the blasting effect from the levels of reflected stress, cracking state, and contact resultant force with the help of the particle expansion method. It is found that: (i) The blasting environment and layer thickness greatly influence the blasting effect, while the inclination angle has a minor influence. (ii) When the layer thickness in a hard rock environment is less than seven times the radius of the crushing zone, the reflective stress near the contact surface increases with the layer thickness, conversely, it decreases. (iii) For hard rock environments with layer thicknesses up to 3 times the radius of the crushing zone, the number of cracks increases with layer thickness at a rate of 68% per meter, conversely, it decreases at a rate of 6.5% per meter. For soft rock environments with layer thicknesses up to 1 times the radius of the crushing zone, the number of cracks decreases at a rate of 112% per meter with layer thickness. It increases at a rate of 10% per meter for layers between 1 and 2 times the radius of the crushing zone. (iv) The average contact resultantforce increases at a rate of 15.4% per meter when the layer thickness gradually increases to 10 times the radius of the crushing zone for hard rock environments and decreases at a rate of 51.7% per meter when the layer thickness increases to 1.5 times the radius of the crushing zone for soft rock environments, and converges if the layer thicknesses continue to increase for both soft rock and hard rock environments.

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Numerical simulation of rock mass blasting using particle flow code and particle expansion loading algorithm

Cited by 31 publications

References 14 publications

Experiments and simulation of block motion in underwater bench blasting

Experiments and simulation of block motion in underwater bench blasting

Study on Mesoscopic Mechanics of Recycled Asphalt Mixture in the Indirect Tensile Test

Analysis of blasting characteristics of interbedded rock mass based on particle expansion method

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