Numerical simulation of directional fracturing by shaped charge blasting

التفاصيل البيبلوغرافية
العنوان: Numerical simulation of directional fracturing by shaped charge blasting
المؤلفون: Yong Chen, Jianbiao Bai, Ningkang Meng, Xiangyu Wang, Bowen Wu, Wenda Wu
المصدر: Energy Science & Engineering, Vol 8, Iss 5, Pp 1824-1839 (2020)
بيانات النشر: Wiley, 2020.
سنة النشر: 2020
مصطلحات موضوعية: Shaped charge, Computer simulation, lcsh:T, directional propagation of blasting‐induced fractures, Mechanics, lcsh:Technology, shaped charge blasting, General Energy, hard roof, lcsh:Q, LS‐DYNA3D, lcsh:Science, Safety, Risk, Reliability and Quality, Geology, Rock blasting
الوصف: The hard roof leads to large deformation or failure of the entry and poses risks to mining safety. Shaped charge blasting is applied to directionally fracture the hard roof and release mining pressure in this paper. The stress condition around the blasting borehole required to induce fracture propagation is calculated by theoretical calculation and numerical simulation. Evolution of blasting‐induced fractures between adjacent boreholes, main fracture in the shaped charge jet direction and secondary fractures in other directions is analyzed. The reliability of Livemore software of explicit dynamics analysis code (LS‐DYNA) in simulating shaped charge blasting is validated by experimental results. A numerical model is established to reveal the formation processes of the shaped charge jet, disclose the evolution of the equivalent stress and understand the development of the main fractures and secondary fractures between adjacent boreholes. The failure type of the rock mass and the fracture development zone are identified. The results indicate that blasting‐induced fractures mainly initiate and propagate in the shaped charge jet direction between adjacent boreholes. Shaped charge blasting leads to the directional propagation of fractures. The field monitoring results show that shaped charge blasting is able to realize the directional propagation of blasting‐induced fractures and release mining pressure.
تدمد: 2050-0505
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c73c7145bf7e8b174bec381cd783f210
https://doi.org/10.1002/ese3.635
حقوق: OPEN
رقم الأكسشن: edsair.doi.dedup.....c73c7145bf7e8b174bec381cd783f210
قاعدة البيانات: OpenAIRE