A Novel Continuous-Discontinuous Multi-Field Numerical Model for Rock Blasting
Source abstract
Abstract
During blasting, rock failure is caused by blasting wave and explosive gas pressure, as a multi-field coupled process. Most numerical models focus on the effect of blasting wave where the gas pressure is commonly accounted for by empirical relations, ignoring the penetration and permeation of gas flow in cracks. This can underestimate the failure region. In this work, a novel multi-field model is developed in the framework of a continuous-discontinuous element method (CDEM), which is a coupled finite-discrete method with explicit integration strategy. The deformation and cracking of rock mass and the distribution of gas pressure are captured. The proposed method is verified by comparing the results to other results provided in published literature. Especially, by simulating the cases with blocked and unblocked blasting hole, we found that: (i) The fracture degree of the case with blocked blasting hole was 30% higher than that of the unblocked blasting hole. (ii) The radial main cracks in the fracture area are mainly caused by the explosive gas, and the tiny and dense cracks near the hole are induced by the explosion stress wave. (iii) The explosion crushing zone is mainly formed by the action of explosion stress wave, while the crack zone is formed by the combined action of the explosion stress wave and explosive gas. The proposed method provides a useful tool to properly simulate a rock blasting process.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Numerical methods in engineering · Rock Mechanics and Modeling · Fluid Dynamics Simulations and Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Funding
National Natural Science Foundation of China · National Key Research and Development Project of China · Ministry of Science and Technology of China
References (41)
Show source-provided references
1. New strategies for some issues of numerical manifold method in simulation of crack propagation10.1002/nme.4620 ↗
2. A four-node quadrilateral element fitted to numerical manifold method with continuous nodal stress for crack analysis10.1016/j.compstruc.2016.08.008 ↗
3. A Cohesive Element-Based Numerical Manifold Method for Hydraulic Fracturing Modelling with Voronoi Grains10.1007/s00603-018-1717-5 ↗
4. A method for dynamic crack and shear band propagation with phantom nodes10.1002/nme.1652 ↗
5. An improved stable XFEM (Is-XFEM) with a novel enrichment function for the computational modeling of cohesive cracks10.1016/j.cma.2015.06.018 ↗
6. Strong discontinuity embedded approach with standard SOS formulation: Element formulation, energy-based crack-tracking strategy, and validations10.1016/j.cma.2015.02.001 ↗
7. Cracking elements: A self-propagating Strong Discontinuity embedded Approach for quasi-brittle fracture10.1016/j.finel.2017.10.007 ↗
8. Cracking elements method for dynamic brittle fracture10.1016/j.tafmec.2018.09.015 ↗
9. Global cracking elements: A novel tool for Galerkin-based approaches simulating quasi-brittle fracture10.1002/nme.6315 ↗
10. Cracking elements method with a dissipation-based arc-length approach10.1016/j.finel.2021.103573 ↗
11. Phase field modeling of fracture in multi-physics problems. Part I. Balance of crack surface and failure criteria for brittle crack propagation in thermo-elastic solids10.1016/j.cma.2014.11.016 ↗
12. A length scale insensitive phase-field damage model for brittle fracture10.1016/j.jmps.2018.06.006 ↗
13. A unified phase-field theory for the mechanics of damage and quasi-brittle failure10.1016/j.jmps.2017.03.015 ↗
14. Cracking particles: A simplified meshfree method for arbitrary evolving cracks10.1002/nme.1151 ↗
15. A three-dimensional large deformation meshfree method for arbitrary evolving cracks10.1016/j.cma.2006.06.020 ↗
16. A simple and robust three-dimensional cracking-particle method without enrichment10.1016/j.cma.2010.03.031 ↗
17. Dual-horizon peridynamics10.1002/nme.5257 ↗
18. Dual-horizon peridynamics: A stable solution to varying horizons10.1016/j.cma.2016.12.031 ↗
19. A generalized bond-based peridynamic model for quasi-brittle materials enriched with bond tension–rotation–shear coupling effects10.1016/j.cma.2020.113405 ↗
20. Bridging the gap between local and nonlocal numerical methods—A unified variational framework for non-ordinary state-based peridynamics10.1016/j.cma.2021.113962 ↗
21. A micropolar peridynamic model with non-uniform horizon for static damage of solids considering different nonlocal enhancements10.1016/j.tafmec.2021.102930 ↗
22. DEM-SPH simulation of rock blasting10.1016/j.compgeo.2013.08.008 ↗
23. Numerical investigation into the blasting-induced damage characteristics of rocks considering the role of in-situ stresses and discontinuity persistence10.1016/j.compgeo.2019.103207 ↗
24. Investigating the mechanism of rock fracturing induced by high-pressure gas blasting with a hybrid continuum-discontinuum method10.1016/j.compgeo.2021.104445 ↗
25. Numerical simulation on complete process of three-dimensional bench blasting in an open-pit mine based on CDEM(in Chinese)
26. A semi-spring and semi-edge combined contact model in CDEM and its application to analysis of Jiweishan landslide10.1016/j.jrmge.2013.12.001 ↗
27. A simple particle–spring method for capturing the continuous–discontinuous processes of brittle materials10.1016/j.enganabound.2022.03.015 ↗
28. Stochastic structural model of rock and soil aggregates by continuum-based discrete element method10.1360/04zze13 ↗
29. A New Numerical Method For Dem-Block And Particle Model10.1016/j.ijrmms.2004.03.076 ↗
30. A novel three-dimensional hydraulic fracturing model based on continuum–discontinuum element method10.1016/j.cma.2021.113887 ↗
31. An Efficient CDEM-based method to calculate full time-space natural fragment field of shell-bearing explosives10.1016/j.ijimpeng.2021.104099 ↗
32. An efficient CDEM-based method to calculate full-scale fragment field of warhead10.1016/j.ijimpeng.2019.103331 ↗
33. Numerical analysis of deep hole multi-stage cut blasting of vertical shaft using a continuum-based discrete element method10.1007/s12517-021-07425-4 ↗
34. Discrete element simulation of blasting damage characteristics of granite under different decoupling coefficients
35. Dynamic response analysis of underground structures under explosion-induced loads
36. A Numerical Study on the Screening of Blast-Induced Waves for Reducing Ground Vibration10.1007/s00603-008-0016-y ↗
37. Rupture of rock with discontinuities under blasting disturbance: Insights from discrete element method modeling10.1016/j.simpat.2022.102486 ↗
38. Banadaki, M.D. (2010). Stress-Wave Induced Fracture in Rock Due to Explosive Action. [Ph.D. Thesis, University of Toronto].
39. Coupling of material point and continuum discontinuum element methods for simulating blast-induced fractures in rock10.1016/j.compgeo.2021.104629 ↗
40. Action-effect study of medium under loading of explosion stress wave and explosion gas
41. Crack propagation behavior in slit charge blasting under high static stress conditions10.1016/j.ijrmms.2019.05.002 ↗