Open Access

ARTICLE

Numerical Study on Mechanism of Blast-Induced Damage Considering Guiding Effect of Water Jet Slot

by Dengfeng Su¹, Zizheng Jia^1,*, Qiang Zhu¹, Zhengguo Li¹, Banghong Chen¹, Dandan Zheng²

1 School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
2 Dazhou Administration of Work Safety, Dazhou, 635000, China

* Corresponding Author: Zizheng Jia. Email:

Structural Durability & Health Monitoring 2023, 17(3), 209-224. https://doi.org/10.32604/sdhm.2022.021257

Received 05 January 2022; Accepted 05 August 2022; Issue published 25 June 2023

Abstract

Damage is one of the most important characteristics of rock failure. Studying the damage mechanism of rock blasting under the guiding effect of the water jet slot and revealing the mechanism of controlled blasting with water jet assistance are crucial. In this study, a rock-like material was chosen as the research object for the calibration experiment of the numerical model. The numerical simulation models were then established by ANSYS/LS-DYNA, and the blast-induced damage mechanism under the guiding effect of the water jet slot was analyzed according to the blasting theory. The results indicated that explosive energy accumulates toward the direction of the slot as the guiding effect of the water jet slot, which allows the rock mass in the direction of the slot bear more damage. Meanwhile, the rock mass in the middle of the connection line between two blastholes bears more damage under the combination of the effect of the explosion stress wave and guiding effect of water the jet slot on the detonation gas during double-slotted borehole blasting, which results in the formation of a gourd-shaped blast-induced damage area. In addition, the influence of the water jet slot on blast-induced damage varies depending on the blasting-process stage.

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