Numerical simulation on explosion mechanism of split-tube charge holders

SHEN Tao; LUO Ning; XIANG Junxiang; GAO Xiangtao

doi:10.11883/bzycj-2017-0410

Volume 38 Issue 5

Jul. 2018

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SHEN Tao, LUO Ning, XIANG Junxiang, GAO Xiangtao. Numerical simulation on explosion mechanism of split-tube charge holders[J]. Explosion And Shock Waves, 2018, 38(5): 1172-1180. doi: 10.11883/bzycj-2017-0410

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SHEN Tao, LUO Ning, XIANG Junxiang, GAO Xiangtao. Numerical simulation on explosion mechanism of split-tube charge holders[J]. Explosion And Shock Waves, 2018, 38(5): 1172-1180. doi: 10.11883/bzycj-2017-0410

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Numerical simulation on explosion mechanism of split-tube charge holders

doi: 10.11883/bzycj-2017-0410

SHEN Tao^{1, 2},
LUO Ning^{1, 2, 3
,
,},
XIANG Junxiang^{1, 2},
GAO Xiangtao⁴

1.
State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
2.
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
3.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China
4.
Guizhou Public Security Bureau, Guiyang 550001, Guizhou, China

Received Date: 2017-11-10
Rev Recd Date: 2017-12-14
Publish Date: 2018-09-25

Abstract

Abstract

To explore the directional-control blasting mechanism of a split-tube charge holder, a model was established by coupling explosive, a split-tube, and air. On the basis of the experimental results of the double split-tube charge holder by the high-speed schlieren system, the established model was used to carry out numerical simulations to investigate the interaction of shock waves, the spatial and temporal distribution of pressure in the explosion fields, and the morphological changes of the split-tube. The investigated results show that in the explosion processes of the split-tube charge holder, the split-tube can effectively control the energy release of explosive and the dynamic behavior of detonation gas; the pressure in the cutting direction appears earlier and it is higher than those in the non-cutting directions; under the joint action of the explosion shock waves and the detonation gas, the curvature of the split-tube decreases continuously and develops along the axial direction of the split-tube with the same deformation characteristics from the initiation detonation point; the numerical simulation results are in agreement with the experimental ones.
- directional control,
- blasting,
- split-tube charge holder,
- detonation gas,
- high-speed schlieren

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References(18)

References

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