文献类型：期刊文献

英文题名：Re-think of solving the gloving problem in bolting systems by adulterating steel particles

作者：Feng, Xiaowei[1];Xue, Fei[2];Jiang, Wenjie[2];Wang, Mingkun[1];Song, Wanxin[1]

机构：[1]China Univ Min & Technol, Sch Mines, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China;[2]Shaoxing Univ, Coll Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China

年份：2021

卷号：268

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000604777000078)、、EI(收录号：20204409434012)、Scopus(收录号：2-s2.0-85094565190)、WOS

基金：The authors would like to acknowledge the financial support for this study from the Fundamental Research Funds for the Central Universities (2020QN41). The improvement of this work was assisted considerably by two anonymous reviewers, who provided many valuable comments on this manuscript, which were thoughtful and insightful; it would have been impossible for the study to have been improved without those comments.

语种：英文

外文关键词：Resin cartridge; Steel particles; Bolt; Pullout test; Gloving; Mechanical property

外文摘要：Resin cartridge is the most widely used bolt supporting material in coal mines; its superiority in applying active and prestressed support to loose rock is well acknowledged. Mastic and catalyst inside a resin cartridge are separately enveloped in polyester film. This film, in most circumstances, is unlikely to be completely broken into pieces; then, the bolt will be wrapped by the film, leading to the terminology of 'gloving'. Gloving has been puzzling coal mine practitioners for many years; its influences on the mechanical properties of bolting systems are still unknown and no consistent conclusion has been established yet. In this study, the effectiveness of adulterating steel particles into the resin cartridge, as raised by some existing literature, was experimentally rediscussed. A total of 78 tests were conducted to test the shredding effects of steel particles by adulterating them into resin cartridges. Specimens prepared by a bolt/cable installation machine highly restored the in situ installation process, during which the revolving speed and the torque of motor were recorded. Then, pullout tests and gloving observations were conducted to clarify the effectiveness of the particles in terms of the mechanical improvement capacity and gloving removing capacity, and the mechanism of gloving and unmixed resin was analyzed explicitly. The results showed that adulterating particles with a specific size and ratio into resin could improve the loading performance of the bolting system, but that was not always the case. Gloving and unmixed resin were major factors that led to deviations and weakened the loading capacity, and the effectiveness of particle adulteration exhibited evident randomness. Furthermore, in most circumstances, gloving and unmixed resin, regardless of the particle sizes, could not be erased by simply mixing the resin cartridge and steel particles. (C) 2020 Elsevier Ltd. All rights reserved.