Numerical Study on the Rock-Breaking Mechanism and Stress Superposition Effect of Double-Hole Delayed Blasting in Deep Reservoirs
Publication: International Journal of Geomechanics
Volume 24, Issue 3
Abstract
With the application of electronic detonators, delayed blasting is considered a very effective method to improve rock fragmentation, and this technique is widely used in practical engineering. Therefore, it is necessary to study the rock-breaking mechanism of double-hole delayed blasting. In this paper, based on the finite difference method, the influence of double-hole delayed blasting on the reservoir permeability was quantitatively analyzed by adopting the adjacent hole spacing, delay time, and decoupling coefficient (K) as variables and the permeability increment as an evaluation index. Based on the parameters studied in this paper, it was found that the effect of the delay time on the reservoir permeability depends on the hole spacing. When the hole spacing is less than 20ra (ra is the borehole radius), a reasonable delay time could significantly increase the reservoir permeability, but when the hole spacing is greater than 20ra, the delay time does not affect reservoir permeability enhancement. The decoupling coefficient could control the attenuation speed of shock wave energy. For K = 2, energy attenuation occurred the slowest, and the reservoir permeability increase effect was the best. Based on site-scale numerical simulations, the mechanism of stress superposition between boreholes was revealed, and the position of stress superposition was controlled by adjusting the delay time to break hard reservoir rock so that the cracks between two holes were connected, i.e., accurate reservoir reconstruction was achieved. This work provides a certain guiding basis for actual engineering applications.
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Data Availability Statement
All data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the support from the Science and Technology Support Plan of Guizhou Province [No. 2022002 Guizhou Kehe Support (2022) General 002], the National Natural Science Foundation of China (Nos. 51979170 and U1967208), the Natural Science Foundation of Hebei Province (No. E2021210128), Hebei Province Science Foundation for Outstanding Yong Scientists (No. E2021210041), and the Hebei Province Graduate Student Innovation Funding Project (No. CXZZBS2023137).
References
Chiappetta, F. 2010. “Combining electronic detonators with stem charges and air decks.” In Proc., Drill and Blast 2010 Conf. Tarkwa, Ghana: University of Mines and Technology (UMaT).
Cho, S. H., and K. Kaneko. 2004a. “Influence of the applied pressure waveform on the dynamic fracture processes in rock.” Int. J. Rock Mech. Min. Sci. 41 (5): 771–784. https://doi.org/10.1016/j.ijrmms.2004.02.006.
Cho, S. H., and K. Kaneko. 2004b. “Rock fragmentation control in blasting.” Mater. Trans. 45 (5): 1722–1730. https://doi.org/10.2320/matertrans.45.1722.
Ding, C., R. Yang, and C. Feng. 2021. “Stress wave superposition effect and crack initiation mechanism between two adjacent boreholes.” Int. J. Rock Mech. Min. Sci. 138: 104622. https://doi.org/10.1016/j.ijrmms.2021.104622.
Duvall, W. I. 1953. “Strain–wave shapes in rock near explosions.” Geophysics 18 (2): 310–323. https://doi.org/10.1190/1.1437875.
Henrych, J. 1979. The dynamics of explosion and its use. New York: Elsevier Scientific Publishing Company.
Hoek, E., C. Carranza-Torres, and B. Corkum. 2002. “Hoek–Brown failure criterion-2002 edition.” In Proc., 5th North American Rock Mechanics Symp. (NARMS-TAC). Toronto: University of Toronto Press.
Johansson, D., and F. Ouchterlony. 2013. “Shock wave interactions in rock blasting: The use of short delays to improve fragmentation in model-scale.” Rock Mech. Rock Eng. 46 (1): 1–18. https://doi.org/10.1007/s00603-012-0249-7.
Katsabanis, P. D., A. Tawadrous, C. Braun, and C. Kennedy. 2006. “Timing effects on the fragmentation of small scale blocks of granodiorite.” Fragblast 10 (1–2): 83–93. https://doi.org/10.1080/13855140600858339.
Kozeny, J. 1927. “Uber Kapillare Leitung der Wasser in Boden.” Royal Acad. Science, Vienna, Proc. Class I 136: 271–306.
Liu, X. M., and S. H. Chen. 2020. “Prediction and effect analysis of surface vibration waveform for group hole delay blasting.” [In Chinese.] Chin. J. Geotech. Eng. 42 (3): 551–560. https://doi.org/10.11779/CJGE202003017.
Rossmanith, H. P. 2002. “The use of Lagrange diagrams in precise initiation blasting, part I: Two interacting blast holes.” Fragblast 6 (1): 104–136. https://doi.org/10.1076/frag.6.1.104.8854.
Rossmanith, H. P., and N. Kouzniak. 2004. “Supersonic detonation in rock mass: Part 2-particle displacements and velocity fields for single and multiple non-delayed and delayed detonating blast holes.” Fragblast 8 (2): 95–117. https://doi.org/10.1080/13855140412331336179.
Schill, M., and J. Sjöberg. 2012. “Finite element simulations of blasting and fragmentation with precise initiation.” In Proc., 12th Int. LS-DYNA User Conf. Detroit: LS-DYNA.
Vanbrabant, F., and A. Espinosa. 2006. “Impact of short delays sequence on fragmentation by means of electronic detonators: Theoretical concepts and field validation.” Fragblast 8: 326–331.
Wang, W., X. C. Li, L. Shi, and Z. M. Fang. 2008. “Discussion on the decoupled charge loosening blasting in deep rock mass.” Rock Soil. Mech. 29 (10): 2037–2842. https://doi.org/10.16285/j.rsm.2008.10.009.
Wang, W., W. Wang, W. Yuan, G. M. Zhou, X. Q. Feng, and X. Y. Liang. 2022. “Numerical simulation of the effect of water-decoupling charge blasting on reservoir permeability enhancement.” Geomatics Nat. Hazards Risk 13 (1): 2356–2384. https://doi.org/10.1080/19475705.2022.2117653.
Wang, X. G. 2010. Handbook of blasting. [In Chinese.] Beijing: Metallurgical Industry Press.
Wei, Y., H. Huihua, W. Anli, X. Jiang, W. Wei, N. Qinghe, and B. Bing. 2022. “Numerical study on the multi-stage blasting in horizontal well to enhance the permeability of deep reservoir.” Geomatics Nat. Hazards Risk 13 (1): 1299–1320. https://doi.org/10.1080/19475705.2022.2066572.
Wei, Y., L. Jiaxin, L. Zonghong, W. Wei, and S. Xiaoyun. 2020. “A strength reduction method based on the generalized Hoek–Brown (GHB) criterion for rock slope stability analysis.” Comput. Geotech. 117: 103240. https://doi.org/10.1016/j.compgeo.2019.103240.
Xahykaeb, A. H. 1980. Physical process of rock blasting in mining. [In Chinese.] Beijing: Metallurgical Industry Press.
Yi, C., D. Johansson, U. Nyberg, and A. Beyglou. 2016. “Stress wave interaction between two adjacent blast holes.” Rock Mech. Rock Eng. 49 (5): 1803–1812. https://doi.org/10.1007/s00603-015-0876-x.
Yuan, W., S. G. Liu, W. Wang, X. B. Su, Z. H. Li, J. X. Li, L. Wen, J. F. Chang, and X. Y. Sun. 2019a. “Numerical study on the fracturing mechanism of shock wave interactions between two adjacent blast holes in deep rock blasting.” Earthquake Eng. Eng. Vibr. 18 (4): 735–746. https://doi.org/10.1007/s11803-019-0533-6.
Yuan, W., W. Wang, X. B. Su, L. Wen, and J. F. Chang. 2019b. “Experimental and numerical study on the effect of water-decoupling charge structure on the attenuation of blasting stress.” Int. J. Rock Mech. Min. Sci. 124: 104133. https://doi.org/10.1016/j.ijrmms.2019.104133.
Zhu, W. C., C. H. Wei, S. Li, J. Wei, and M. S. Zhang. 2013. “Numerical modeling on destress blasting in coal seam for enhancing gas drainage.” Int. J. Rock Mech. Min. Sci. 59: 179–190. https://doi.org/10.1016/j.ijrmms.2012.11.004.
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Published In
International Journal of Geomechanics
Volume 24 • Issue 3 • March 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Feb 8, 2023
Accepted: Aug 28, 2023
Published online: Dec 27, 2023
Published in print: Mar 1, 2024
Discussion open until: May 27, 2024
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