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Study on the Three-Dimensional Behavior of Blasting Considering Non-Uniform In-Situ Stresses Distributed along the Blasthole Axis

التفاصيل البيبلوغرافية
العنوان: Study on the Three-Dimensional Behavior of Blasting Considering Non-Uniform In-Situ Stresses Distributed along the Blasthole Axis
المؤلفون: Gongyuan Wang, Jianbiao Bai, Ningkang Meng, Xiangqian Zhao
المصدر: Applied Sciences, Vol 14, Iss 14, p 6256 (2024)
بيانات النشر: MDPI AG, 2024.
سنة النشر: 2024
المجموعة: LCC:Technology
LCC:Engineering (General). Civil engineering (General)
LCC:Biology (General)
LCC:Physics
LCC:Chemistry
مصطلحات موضوعية: non-uniform in-situ stress, rock blasting, three-dimensional damage, lateral pressure coefficient, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
الوصف: For roof-cutting by blasting in the gob-side entry under an overhanging hard roof, studies on the impacts of in-situ stresses on the propagation of blast-induced cracks have typically focused on uniform stresses but ignored the effects of non-uniform in-situ stresses (NIS) distributed along the blasthole axis. Therefore, the distribution patterns of hoop stress and rock damage caused by NIS distributed along the blasthole axis were investigated using numerical modeling and theoretical analysis. The results illustrate that with the rising NIS for the cross section along the blasthole axis, the peak values of hoop compressive stress at the same distance from the blasthole’s center gradually increase, resulting in a nonlinear attenuation trend in the damage range of the rock. Consequently, the spacing between blastholes should be determined based on the average length of the primary cracks under the maximum confining pressure. Additionally, for the cross section perpendicular to the blasthole axis, as the lateral pressure coefficient increases from 0.25 to 2, the damage range in the vertical direction significantly decreases. This results in varying extents of blast-induced cracks within the coal pillar, providing a reference for the design of shallow-borehole crack filling.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2076-3417
Relation: https://www.mdpi.com/2076-3417/14/14/6256; https://doaj.org/toc/2076-3417
DOI: 10.3390/app14146256
URL الوصول: https://doaj.org/article/caff58e337004e9bb16c84650d8525f4
رقم الأكسشن: edsdoj.ff58e337004e9bb16c84650d8525f4
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20763417
DOI:10.3390/app14146256