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Study on the Influences of Empty Hole and In Situ Stress on Blasting-Induced Rock Damage

التفاصيل البيبلوغرافية
العنوان: Study on the Influences of Empty Hole and In Situ Stress on Blasting-Induced Rock Damage
المؤلفون: Ningkang Meng, Jian-biao Bai, Wenlong Shen, Yong Chen, Xiangyu Wang, Wenda Wu, Bowen Wu
المصدر: Geofluids, Vol 2021 (2021)
بيانات النشر: Wiley, 2021.
سنة النشر: 2021
المجموعة: LCC:Geology
مصطلحات موضوعية: Geology, QE1-996.5
الوصف: Blasting has been used extensively in deep underground excavation. In this paper, a numerical simulation LS-DYNA was carried out to investigate the influence of in situ stress and empty hole on rock fracture development. Based on the simulation process and existing laboratory data, the micromechanical properties of the Riedel-Hiermaier-Thoma (RHT) model were calibrated. By then, this model was used to study the effects of in situ stress and empty hole on the degree of damage and fracture development in the rock. Simulation results revealed that the difference between horizontal and vertical principal stresses can influence the degree of damage as well as the fracture initiation and development, which in turn leads to the fracture development towards a high-stress concentration area. Numerical simulation also showed that the total area of fracture development gradually decreases with the increasing in situ stress magnitudes. Under the same stress conditions, empty hole can facilitate the fracture development at 90°, while preventing the subsequent fracture development at 60° and 120°. This would result in further fracture propagation at 90°, such that the control of fracture direction can be achievable.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1468-8115
1468-8123
Relation: https://doaj.org/toc/1468-8115; https://doaj.org/toc/1468-8123
DOI: 10.1155/2021/6643042
URL الوصول: https://doaj.org/article/7e6b7681046e4a449589a8b90db198c2
رقم الأكسشن: edsdoj.7e6b7681046e4a449589a8b90db198c2
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:14688115
14688123
DOI:10.1155/2021/6643042