A study on crack propagation and stress wave propagation in different blasting modes of shaped energy blasting

被引：0

作者：

Liang H. ^{[1
]}

Guo P. ^{[1
,2
]}

Sun D. ^{[1
]}

Ye K. ^{[1
]}

Zou B. ^{[3
]}

Yuan Y. ^{[1
]}

机构：

[1] School of Civil Engineering, Shaoxing University of Arts and Science, Shaoxing

[2] State Key Laboratory of Deep Rock and Soil Mechanics and Underground Engineering, China University of Mining and Technology, Beijing

[3] School of Civil and Architectural Engineering, Zhejiang University of Science and Technology, Hangzhou

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 04期

关键词：

Concentrated energy stretching blasting; Continuous hole blasting; Crack propagation; Deep hole blasting;

D O I：

10.13465/j.cnki.jvs.2020.04.020

中图分类号：

学科分类号：

摘要：

In order to study the propagation of stress wave and crack evolution in biaxial energy accumulation blasting, the propagation form and crack propagation law of stress wave in single hole blasting, continuous hole blasting, and deep hole blasting were studied by theoretical analysis and numerical simulation. The results show that the crack propagation length of continuous hole energy accumulation blasting and deep hole energy accumulation blasting is 900 mm in horizontal radius, while that of single hole energy accumulation blasting is only 600 mm, which indicates that the superposition of stress wave increases the tangential tensile stress, and the energy accumulation direction forms cracks is parallel to the hole center line, and the crack extends until it runs through. With the propagation of stress wave in deep hole blasting crack, the tip tension stress zone is also moving forward, promoting the crack to continue to develop until it runs through. This study provides an effective and real reference for rock forming blasting and has a broad application prospect. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：157 / 164and184

共 22 条

[1] Liu J., Liu Z., Gao K., Et al., Experimental study of extension characters of cracks in coal seam under blasting load with different charging modes, Chinese Journal of Rock Mechanics and Engineering, 35, 4, pp. 735-742, (2016)
[2] Yang R., Zhang Z., Yang L., Et al., Cumulative blasting experiment study of slotted cartridge based on hard-rock rapid driving technology, Chinese Journal of Rock Mechanics and Engineering, 32, 2, pp. 317-323, (2013)
[3] Guo D., Zhao J., Lu P., Et al., Dynamic effects of deep-hole cumulative blasting in coal seam and its application, Chinese Journal of Engineering, 38, 12, pp. 1681-1687, (2016)
[4] Guo D., Zhao J., Zhang C., Et al., Mechanism of control hole on coal crack initiation and propagation under deep-hole cumulative blasting in coal seam, Chinese Journal of Rock Mechanics and Engineering, 37, 4, pp. 919-930, (2018)
[5] Guo D., Pei H., Song J., Et al., Study on spliting mechanism of coal bed deep-hole cumulative blasting to improve permeability, Journal of China Coal Society, 33, 12, pp. 1381-1385, (2008)
[6] Guo D., Zhang C., Zhu T., Et al., Effect of charge structure on deep-hole cumulative blasting to improve coal seam permeability, Chinese Journal of Engineering, 40, 12, pp. 1488-1494, (2018)
[7] He M., Gao Y., Yang J., Et al., An energy-gathered roof cutting technique in no-pillar mining and its impact on stress variation in surrounding rocks, Chinese Journal of Rock Mechanics and Engineering, 36, 6, pp. 1314-1325, (2017)
[8] Kutter H.K., Fairhurst C.F., On the fracture process in blasting, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 18, 3, pp. 181-202, (1971)
[9] Yang R., Zuo J., Song J., Et al., Experimental study on the extension rule of crack group around a hole under explosive stress wave, Journal of Vibration and Shock, 37, 14, pp. 74-78, (2018)
[10] Ma W., Li J., Liang W., Et al., Numerical analysis of rock damage under the action of explosive stress wave, Safety in Coal Mines, 46, 9, pp. 188-195, (2015)

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