高压物理学报2021，Vol.35Issue(6)：156-164,9.DOI:10.11858/gywlxb.20210763
岩石钻孔爆炸致裂研究
Borehole Blasting-Induced Fractures in Rocks
摘要
Abstract
Dynamic fracture behavior of rocks under blasting loading are a major concern in civil engineering, mining, oil and gas industries. This study presented herein is on the borehole blasting-induced fractures in rocks. The paper consists of two parts: the first part gives a brief description of a constitutive model for rocks subjected to dynamic loading, which is mainly based on a recently developed model for concrete; the second part deals with numerical simulations of borehole blasting-induced fractures in rocks. The values of various parameters in the constitutive model for granite are first estimated and then employed in the numerical simulations. It is demonstrated that the numerical results in terms of peak pressures and crack patterns predicted from the present model are in good agreement with the experimental observations made both in cylindrical granite sample reported in the literature and in square granite specimens conducted in our own laboratory. Moreover, the analysis shows that the experimentally observed crack patterns are mainly caused by tensile stress, while the smaller cracks around borehole are created largely by compression/shear stress.关键词
花岗岩/本构模型/钻孔爆炸/开裂Key words
granite rocks/constitutive model/borehole blasting/fracture分类
数理科学引用本文复制引用
郭晓钧,文鹤鸣..岩石钻孔爆炸致裂研究[J].高压物理学报,2021,35(6):156-164,9.基金项目
Doctoral?Program?of?Nanchang?Hangkong?University?(EA201511012) （EA201511012）
