文献类型：期刊文献

英文题名：Damage characteristics and fracture evolution laws for prefabricated hole rock specimens

作者：Zhou, Yang Kong, Dezhong Zuo, Yujun Wen, Zhijie Xu, Mengtang Chen, Fei Zhang, Yuan

第一作者：Zhou, Yang

通信作者：Kong, DZ[1]

机构：[1]Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Inst Ming Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China.

年份：2025

卷号：136

外文期刊名：THEORETICAL AND APPLIED FRACTURE MECHANICS

收录：;EI(收录号：20245017508554);Scopus(收录号：2-s2.0-85211211618);WOS:【SCI-EXPANDED(收录号:WOS:001382289100001)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (No. 52104123, No. 52164002, No. 52164005, No. 52064005) ; Qiankehe Platform Talents, Grant/Award Number: (GCC [2023] 056) ; Guizhou Provincial Department of Education 2023 Annual College Science and Technology Innovation Team (Guizhou Education Technology [2023] 055) ; Guizhou Provincial Basic Research Program (Natural Science) (Qianke He Foundation-ZK [2024] Key 022, Qianke He Foundation-ZK [2024] General 351) ;Guizhou Science and Technology Plan Project (Qianke Science Support [2023] General 122) and the Yuxiu Innovation Project of NCUT (Project No. 2024NCUTYXCX209) .

语种：英文

外文关键词：Rock mechanics; Unidirectional stress; Prefabricated holes; Built-in holes; Fracture evolution; Damage characteristics

摘要：A significant number of karst mines are present in the southwestern region of China. The dissolution of rock within these mines has resulted in the formation of numerous hole defects within the rock body. To investigate the mechanisms of rock destruction under stress conditions, uniaxial compression tests are conducted using rocklike specimens. These tests examine the mechanical properties of rock-like specimens with varying shapes and locations of holes. The rupture evolution process of the specimens is monitored and analyzed using digital image- related technology. Finally, numerical simulation methods are employed to invert the simulation of the destruction characteristics of specimens with pore defects under unidirectional stress damage. Ultimately, numerical simulation is employed to reverse engineer the damage characteristics of specimens with hole defects under unidirectional stress damage. It was determined that specimens containing holes exhibited a notable decline in strength. When the holes were situated in the upper, middle, and lower regions of the specimens, the compressive strength was observed to diminish by 29.80%, 46.77%, and 30.85%, respectively, in comparison to the intact specimens. The compressive strength of the complete specimen exhibited a notable decline, reaching 31.90%, 35.50%, and 40.31% reductions when the holes were shaped as spheres, squares, and polygons, respectively. This observation suggests that the strength of the specimen was most susceptible to the location of the holes in the central region and the shape of the holes as polygons. The presence of holes results in the maximum principal strain being concentrated in the vicinity of the holes. Consequently, the location of crack development often coincides with the strain concentration area. This test result can be utilized as a precursor to warning of specimen damage.