Calculation methods for characteristic sizes of blasting cavities induced by finite-length cylindrical charges in soil

LI Pengyi; WANG Zhongqi; XU Qian; LIANG Xingxing

doi:10.11883/bzycj-2018-0416

Volume 39 Issue 12

Dec. 2019

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LI Pengyi, WANG Zhongqi, XU Qian, LIANG Xingxing. Calculation methods for characteristic sizes of blasting cavities induced by finite-length cylindrical charges in soil[J]. Explosion And Shock Waves, 2019, 39(12): 124201. doi: 10.11883/bzycj-2018-0416

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Calculation methods for characteristic sizes of blasting cavities induced by finite-length cylindrical charges in soil

doi: 10.11883/bzycj-2018-0416

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Received Date: 2018-10-22
Rev Recd Date: 2019-01-03
Publish Date: 2019-12-01

Abstract

Abstract

In order to calculate the cavity sizes for the cylindrical charges in soil, a new method was established to calculate the characteristic cavity sizes for finite-length cylindrical charges in soil. In the new method, the quasi-static model for spherical charges is used to calculate the cavities induced by cylindrical charges. In this method, the characteristic cavity sizes and the plastic zones are calculated at the larger length-to-diameter ratio. The numerical simulation results show that the error decreases with the increase of the length-to-diameter ratio, when the number N of the spherical explosive packages is n and the length-to-diameter ratio is 10 or higher, the error is less than 12.2%. The results also show that the established method can accurately predict the characteristic sizes of the cavities induced by the finite-length cylindrical charge blasting.
- cylindrical charge,
- cavity size,
- plastic zone,
- length-to-diameter ratio

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References(11)

References

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