文献类型：期刊文献

英文题名：A novel rock bolting system exploiting steel particles

作者：Feng, Xiaowei[1,2];Xue, Fei[3];Carvelli, Valter[4];Zhao, Tongyang[1];He, Fengzhen[4];Wang, Dehua[2]

机构：[1]Shandong Univ Sci & Technol, State Key Lab Strata Intelligent Control & Green, Qingdao 266590, Peoples R China;[2]China Univ Min & Technol, Sch Mines, Xuzhou 221116, Jiangsu, Peoples R China;[3]Shaoxing Univ, Coll Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[4]Politecn Milan, Dept ABC, I-20133 Milan, Italy

年份：2022

卷号：32

期号：5

起止页码：1045

外文期刊名：INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000917926900004)、、EI(收录号：20223312583474)、Scopus(收录号：2-s2.0-85135897556)、WOS

基金：The authors would like to acknowledge the financial support of the State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology (No. SICGM202208) and China Scholarship Council Grant (CSC#202006425019). Jinbo Hua from Gubei Coal Mine, Chengcheng Hu and Guoxiong Hou from Qingdong Coal Mine are acknowledged for their contribution to the field tests.

语种：英文

外文关键词：Rock bolt; Steel particle; Pullout test; Digital image correlation; Infrared thermography; Field test

外文摘要：The effectiveness of rock bolting in ground control has been extensively investigated, mainly for resin based systems. Alternative coupling materials are needed to have good mechanical performance and to reduce the economic impact. This study proposed a new bolting system exploiting steel particles as coupling material. The applicability of this system was assessed by laboratory and field pullout tests, assisted by digital imaging correlation (DIC), infrared thermography (IRT) and acoustic emission (AE). The results indicated that, for a 20 mm diameter bolt, the suitable steel particle size and corresponding inner diameter of borehole were 1.4 and 28 mm, respectively. For bolts installed in steel tubes, the particles improved the loading capacity compared to the resin bonded ones. Additional pullout tests on cement blocks indicated that steel particles can be effective for hard rock, whilst resin was a better choice for bolting of soft rock. Similar understanding was obtained by pullout tests in engineering fields, which demonstrated that the steel particles coupled bolts can provide favorable effects in hard rock mass, while the effects were negligible when installed in extremely soft coal mass. The wide set of multi-technique measurements helped to understand the mechanisms involved in the performance of the bolting system with coupling steel particles. (c) 2022 Published by Elsevier B.V. on behalf of China University of Mining & Technology. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).