首页|Adjustment mechanism of blasting dynamic-static action in the water decoupling charge

Adjustment mechanism of blasting dynamic-static action in the water decoupling charge

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Water decoupling charge blasting excels in rock breaking,relying on its uniform pressure transmission and low energy dissipation.The water decoupling coefficients can adjust the contributions of the stress wave and quasi-static pressure.However,the quantitative relationship between the two contributions is unclear,and it is difficult to provide reasonable theoretical support for the design of water decoupling blasting.In this study,a theoretical model of blasting fracturing partitioning is established.The mechan-ical mechanism and determination method of the optimal decoupling coefficient are obtained.The reli-ability is verified through model experiments and a field test.The results show that with the increasing of decoupling coefficient,the rock breaking ability of blasting dynamic action decreases,while quasi-static action increases and then decreases.The ability of quasi-static action to wedge into cracks changes due to the spatial adjustment of the blast hole and crushed zone.The quasi-static action plays a leading role in the fracturing range,determining an optimal decoupling coefficient.The optimal water decoupling coef-ficient is not a fixed value,which can be obtained by the proposed theoretical model.Compared with the theoretical results,the maximum error in the model experiment results is 8.03％,and the error in the field test result is 3.04％.

Water decoupling blastingBlasting dynamic-static actionOptimal decoupling coefficientAdjustment mechanism

Hao Zhang、Xueyang Xing、Yiteng Du、Tingchun Li、Jianxin Yu、Qingwen Zhu

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College of Civil Engineering and Architecture,Shandong University of Aeronautics,Binzhou 256600,China

Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China

School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China

National Natural Science Foundation of ChinaHenan Excellent Youth Science Fund ProjectColleges and Universities Youth and Innovation Science and Technology Support Plan of Shandong Province

No.42372331No.242300421145No.2021KJ024

2024

10.1016/j.ijmst.2024.07.001

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2024.34(6)
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