Experimental and numerical studies on progressive debonding of grouted rock bolts

Simple item page
dc.contributor.authorShi, Hao
dc.contributor.authorSong, Lei
dc.contributor.authorZhang, Houquan
dc.contributor.authorChen, Wenlong
dc.contributor.authorLin, Huasheng
dc.contributor.authorLi, Danqi
dc.contributor.authorWang, Guozhu
dc.contributor.authorZhao, Huayun
dc.date.accessioned2022-03-11T17:08:06Z
dc.date.available2022-03-11T17:08:06Z
dc.date.issued2021-10-15
dc.description.abstractUnderstanding the mechanism of progressive debonding of bolts is of great significance for underground safety. In this paper, both laboratory experiment and numerical simulation of the pull-out tests were performed. The experimental pull-out test specimens were prepared using cement mortar material, and a relationship between the pull-out strength of the bolt and the uniaxial compressive strength (UCS) of cement mortar material specimen was established. The locations of crack developed in the pull-out process were identified using the acoustic emission (AE) technique. The pull-out test was reproduced using 2D Particle Flow Code (PFC2D) with calibrated parameters. The experimental results show that the axial displacement of the cement mortar material at the peak load during the test was approximately 5 mm for cement-based grout of all strength. In contrast, the peak load of the bolt increased with the UCS of the confining medium. Under peak load, cracks propagated to less than one half of the anchorage length, indicating a lag between crack propagation and axial bolt load transmission. The simulation results show that the dilatation between the bolt and the rock induced cracks and extended the force field along the anchorage direction; and, it was identified as the major contributing factor for the pull-out failure of rock bolt.en_UK
dc.identifier.citationShi H, Song L, Zhang H, et al., (2022) Experimental and numerical studies on progressive debonding of grouted rock bolts. International Journal of Mining Science and Technology, Volume 32, Issue 1, January 2022, pp. 63-74en_UK
dc.identifier.issn2095-2686
dc.identifier.urihttps://doi.org/10.1016/j.ijmst.2021.10.002
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/17646
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectBolt pull-out testen_UK
dc.subjectBolt failure processen_UK
dc.subjectAE positioningen_UK
dc.subjectMeso-interactionen_UK
dc.subjectPFC2D simulationen_UK
dc.titleExperimental and numerical studies on progressive debonding of grouted rock boltsen_UK
dc.typeArticle

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Progressive_debonding_of_grouted_rock_bolts-2022.pdf
Size:
7.22 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SWEE)