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A Calculation Method of Wall Pressure for Uncoupled Liquid Oxygen Explosion for Rock Fracturing
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Hua-heng ZENG1a, 1b, Ye-long XIE2, Yan HU2, Bi-gang CHEN3, Yong WEI1a, 1b, Xiao-feng HUO1a, 1b
Blasting | 2025, 42(2) : 146 - 157
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Blasting | 2025, 42(2): 146-157
• BLASTING MATERIALS •
A Calculation Method of Wall Pressure for Uncoupled Liquid Oxygen Explosion for Rock Fracturing
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Hua-heng ZENG1a, 1b, Ye-long XIE2, Yan HU2, Bi-gang CHEN3, Yong WEI1a, 1b, Xiao-feng HUO1a, 1b
Affiliations
  • 1.a.Zijin College of Geology and Mining, Fuzhou University, Fuzhou 350108, China
  • 1.b.Institute of Explosive Technology, Fuzhou University, Fuzhou 350108, China
  • 2.Zhongchang Nuclear Industry (Fujian) Construction Development Co., Ltd., Nanping 353200, China
  • 3.Fujian Transportation Research Institute Co., LTD., Fuzhou 350004, China
Published: 2025-06-01 doi: 10.3963/j.issn.1001-487X.2025.02.018
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Given the current lack of comprehensive research on the mechanism of rock fracturing by high-pressure gas, this study draws upon the research method used to determine peak pressure at the borehole wall in the drilling and blasting method. By analyzing the complete rock fracturing process through the liquid oxygen expansion method, a calculation model for the peak pressure at the borehole wall was derived from the shock tube theory, considering the changes in the rock medium and uncoupling coefficient. Using a dynamic strain tester, a concrete model experiment was conducted to measure the peak pressure at the borehole. Under fixed conditions of a 60 mm expansion tube diameter and four different apertures (75~120 mm), the peak pressure was measured. The test results show that, with the same liquid oxygen equivalent and rock medium conditions, the time to peak pressure increases linearly with the uncoupling coefficient, following the relationship t=230.6k-127.85. As the uncoupling coefficient increases, the peak pressure at the borehole wall decreases gradually, with the attenuation rate gradually slowing. A comparison between the experimental results with the theoretical calculations shows a similar trend in peak pressure attenuation with the uncoupling coefficient, confirming the reliability of the theoretical model.

liquid oxygen expansion rock breaking method  /  radial uncoupled installation  /  peak hole wall pressure  /  model experiment
Hua-heng ZENG, Ye-long XIE, Yan HU, Bi-gang CHEN, Yong WEI, Xiao-feng HUO. A Calculation Method of Wall Pressure for Uncoupled Liquid Oxygen Explosion for Rock Fracturing[J]. Blasting, 2025 , 42 (2) : 146 -157 . DOI: 10.3963/j.issn.1001-487X.2025.02.018
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  • National Natural Science Foundation of China(52109124)
Appendix
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Year 2025 volume 42 Issue 2
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133
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Article Info
doi: 10.3963/j.issn.1001-487X.2025.02.018
  • Receive Date：2024-06-25
  • Online Date：2026-03-19
  • Published：2025-06-01
Article Data
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History
  • Received：2024-06-25
Funding
National Natural Science Foundation of China(52109124)
Affiliations
    1.a.Zijin College of Geology and Mining, Fuzhou University, Fuzhou 350108, China
    1.b.Institute of Explosive Technology, Fuzhou University, Fuzhou 350108, China
    2.Zhongchang Nuclear Industry (Fujian) Construction Development Co., Ltd., Nanping 353200, China
    3.Fujian Transportation Research Institute Co., LTD., Fuzhou 350004, China

Corresponding:

HUO Xiao-feng (1994-), born in Pingshan, Hebei Province, Ph. D, master supervisor, mainly engaged in teaching and research in mining engineering and blasting engineering, (E-mail) .
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https://castjournals.cast.org.cn/joweb/bp/EN/10.3963/j.issn.1001-487X.2025.02.018
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表12种不同金属材料的力学参数
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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