文献类型：期刊文献

英文题名：Full Field Strain Analysis of Blasting Under High Stress Condition Based on Digital Image Correlation Method

作者：Yang, Liyun Ding, Chenxi Yang, Renshu Lei, Zhen Wang, Jing

第一作者：Yang, Liyun

通信作者：Ding, CX[1]

机构：[1]China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing 100083, Peoples R China;[2]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing 100083, Peoples R China

通信机构：corresponding author), China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing 100083, Peoples R China.

年份：2018

卷号：2018

外文期刊名：SHOCK AND VIBRATION

收录：;EI(收录号：20185206294093);Scopus(收录号：2-s2.0-85058965524);WOS:【SCI-EXPANDED(收录号:WOS:000453815200001)】；

基金：This research was supported by the National Key Research and Development Program of China (no. 2016YFC0600903) and the National Natural Science Foundation of China (no. 51664007).

语种：英文

外文关键词：Blasting - Coal deposits - Coal industry - Correlation methods - Decay (organic) - Explosives - Image analysis - Minerals - Strain measurement

摘要：The depth of mineral resources like coal continuously increases due to the exhaustion of shallow resources, and the characteristic of high ground stress in deep ground inevitably affects fracture of rock blasting. Combining with high-speed photography technology, the digital image correlation method (DIC) is introduced into experimental study on explosive mechanics. And strain evolution process of blasting under high stress condition is obtained by using the model experiment method. The preliminary results show that high stress condition has no obvious effects on the propagation law of blasting stress wave or its stress peak in the medium. In addition, it is found that medium in the elastic vibration area by conventional blast zoning is not always elastic, and on this basis, the concepts of plastic area and quasielastic area are put forward. The high stress condition does not influence partition range of above plastic area or quasielastic area, but in the plastic area, the high stress condition decreases both plastic strain value and its decay rate of relevant gauging points.