Numerical simulation of the complete rock blasting response by SPH–DAM–FEM approach

Hu, Yingguo; Lu, Wenbo; Chen, Ming; Peng, Yan; Zhang, Yuzhu

doi:10.1016/j.simpat.2015.04.001

Cited by 50 publications

(18 citation statements)

References 31 publications

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“…The symmetry boundary was employed in the normal direction of the plane; meanwhile, for the other faces of this model, expect for the free surface, the nonreflecting boundary was applied to prevent the waves reflection at the model surface and the imaginary monitoring points were arranged on the top surface of this model, as shown in Figure 3. In this simulation, the parameters of the rock and explosive are given in Tables 1 and 2 [20], respectively. The S wave identification results on the two monitoring points are given in Figure 4 and Table 3.…”

Section: Methods Of S-wave Identificationmentioning

confidence: 99%

“…The field blasting tests were carried out in Fengning pumped storage power station to calculate the parameters value of rock mass by monitoring the blasting vibration signals. The Fengning pumped storage power station, with a capacity [20]. of 3600 MW, is located in Fengning manchu autonomous county in Hebei, China.…”

Section: Field Experimental Studies On Back Analysis and Calculation mentioning

confidence: 99%

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Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Yang

Gao

et al. 2018

Mathematical Problems in Engineering

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How to obtain dynamic parameters of rock masses quickly and precisely is a popular and difficult problem, which plays a very important part in engineering design or construction. Currently, the methods used to obtain these parameters are in situ testing method, empirical formula, and so on. However, these methods have some shortcomings, such as large investment and long construction period, which cannot obtain the dynamic parameters precisely and quickly in the engineering scale. In this study, a new method of estimating the rock parameters based on the measured field blasting vibration signals is proposed according to theory of elastic stress wave. In addition, an improved method for S-wave identification used in engineering scale was proposed and then the numerical simulation is given to verify the feasibility. Comparison of the numerical identification results and theoretical results clearly show that the improved method is available in S-wave identification with errors less than 2%. By identifying the arrival times of P and S waves, the propagation velocities of P and S waves are calculated and the parameters of rock mass can be obtained at last. Through analyzing the measured field blasting vibration signals in Fengning pumped-storage power station, the dynamic elastic modulus of rock mass inversed by vibration signals is about 2.2∼2.9 times of its static elastic modulus, while the inversed dynamic Poisson's ratio is 0.9∼0.975 times of the static.

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Section: Methods Of S-wave Identificationmentioning

confidence: 99%

Section: Field Experimental Studies On Back Analysis and Calculation mentioning

confidence: 99%

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Yang

Gao

et al. 2018

Mathematical Problems in Engineering

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“…The blast-induced fracture of rock has been modeled and simulated by many authors [12][13][14]. Several scenarios at different scales, including small-scale blasting testing [15][16][17][18], bench and cutting blasting [12,14,19,20], and large-scale modeling and simulations, e.g., mines [19,[21][22][23], have been considered. To simulate the fracture phenomenon, numerous different computational techniques can be implemented to reproduce the dynamic behavior of rock or other brittle materials.…”

Section: Introductionmentioning

confidence: 99%

“…Mesh-based methods can be effectively used but must consider additional factors when dealing with large deformation in the model, e.g., regularization, erosion criteria, softening, and remeshing [24][25][26]. The problem of significant element distortion can be omitted by using different methods, e.g., the arbitrary Lagrangian-Eulerian (ALE) formulation [15,18,27], discrete element method (DEM) [28,29] or mesh-free methods like smooth particle hydrodynamics (SPH) [23,30]. It is also possible to couple different techniques; such an approach has proved efficient and reliable in the case of blast-induced brittle fracture [17,23,28], as well as other engineering problems [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Experimental testing and numerical simulations of blast-induced fracture of dolomite rock

et al. 2020

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In this paper, the Johnson-Holmquist II (JH-2) model with parameters for a dolomite rock was used for simulating rock fragmentation. The numerical simulations were followed by experimental tests. Blast holes were drilled in two different samples of the dolomite, and an emulsion high explosive was inserted. The first sample was used to measure acceleration histories, and the cracking pattern was analyzed to perform a detailed study of the blastinduced fracture to validate the proposed method of modelling and to analyze the capability of the JH-2 model for the dolomite. The second sample was used for further validation by scanning the fragments obtained after blasting. The geometries of the fragments were compared with numerical simulations to further validate the proposed method of modelling and the implemented material model. The outcomes are promising, and further study is planned for simulating and optimizing parallel cut-hole blasting.

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“…However, the blasting shock wave by explosive will cause damage of rock mass that is unnecessary, which may lead to many accidents. erefore, the dynamic response of rock under blasting load has attracted many scholars' attention [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pre-Existing Symmetrical Cracks on Propagation Behaviors of a Blast-Induced Crack

Wan

Zhu

Zhou

et al. 2020

Shock and Vibration

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Defects such as voids, pores, and joints will transform into big scale cracks in the rock of tunnel surrounding under dynamic load like blasting and earthquake. In this paper, three kinds of symmetrical cracks were chosen as an example, and experiments and numerical simulations were conducted to study the effect of symmetric cracks on a blast-induced crack. The relationship of main crack propagation characteristic and distribution of symmetrical cracks was investigated. Some circular specimens using two kinds of material, PMMA and sandstone, including a center hole charged with a detonator and pre-existing cracks were used in the experiments. The test system consisted of an oscilloscope and an ultradynamic strain amplifier and crack propagation gauges (CPGs) were employed in monitoring propagation velocity. AUTODYN code was applied in numerical simulation to investigate the propagation behavior of main crack between symmetrical cracks. Linear equation of state and a modified major principal stress failure criterion was utilized to describe the status of rock material. Based on experimental and numerical results, it can be concluded that (1) the pre-existing symmetrical cracks have arrest effect on main crack propagation, (2) compressive stress in y-direction plays very important roles in crack arrest, and (3) the spacing of parallel cracks has a great influence on crack propagation length and velocity.

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Numerical simulation of the complete rock blasting response by SPH–DAM–FEM approach

Cited by 50 publications

References 31 publications

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Experimental testing and numerical simulations of blast-induced fracture of dolomite rock

Effect of Pre-Existing Symmetrical Cracks on Propagation Behaviors of a Blast-Induced Crack

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