文献类型：期刊文献

英文题名：Experimental study on anchorage mechanical effect of rock bolts on cross-jointed rock mass using DIC and AE

作者：Xue, Fei[1];Tong, Zhuoya[1];Chen, Wei[2];Wang, Tianzuo[1];You, Xiaobo[1];Lin, Zhongqin[1,3]

机构：[1]Shaoxing Univ, Coll Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[2]Jiangsu Pengcheng Carbon Asset Operat Co Ltd, Xuzhou 221000, Peoples R China;[3]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Peoples R China

年份：2025

卷号：137

外文期刊名：THEORETICAL AND APPLIED FRACTURE MECHANICS

收录：SCI-EXPANDED(收录号：WOS:001428447300001)、、EI(收录号：20250717889389)、Scopus(收录号：2-s2.0-85217804067)、WOS

基金：The authors would like to acknowledge the financial support for this study provided by the National Natural Science Foundation of China (Grant No. 52104094) , the China Postdoctoral Science Foundation (Grant No. 2022M721997) , and the Zhejiang Provincial Natural Science Foundation of China (Grant No. LGJ22D020001) .

语种：英文

外文关键词：3D printing; Cross-joints; Anchoring effect; Uniaxial compression; Acoustic emission; DIC technology

外文摘要：Rock bolting is a commonly used reinforcement technique for jointed rock masses. This study investigates the anchorage effects of rock bolts on cross-jointed rock masses. Novel 3D-printed stainless steel bolts were used to reinforce rock-like specimens with main joint angles of 15 degrees, 30 degrees, 45 degrees, 60 degrees, and 75 degrees. The integration of Acoustic Emission (AE) and Digital Image Correlation (DIC) techniques enabled comprehensive monitoring of crack propagation and strain evolution. The results show that bolt reinforcement significantly enhanced specimen strength (up to 79.9 %) and elastic modulus (up to 37.9 %) at smaller joint angles (<= 45 degrees). However, the reinforcement effectiveness diminished considerably at larger angles (>= 60 degrees), with strength reductions of up to 10.6 %. The combined AE-DIC analysis revealed distinct failure mechanisms: tensile-dominated failure at small joint angles and shear-dominated failure at larger joint angles. This study provides practical guidelines for optimizing rock bolt applications in jointed rock masses, particularly highlighting the need for alternative support strategies at large joint angles.