| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 11001365 | Tunnelling and Underground Space Technology | 2018 | 14 Pages |
Abstract
The reinforcement mechanism of fully grouted passive rock bolting and the effect of supporting parameters are analyzed by the proposed hybrid model. Some useful numerical results are presented. It is found that rock bolts prevent the breakage of particle bonds immediately around them, and two transmission patterns of bond forces are observed in the nearby areas of rock bolts. Increasing the number of bolts contributes to significantly reduce the rock breakage region and bond breakage number. A threefold reduction of the number of broken bonds occurs passing from 4 to 12 rock bolts. The reinforcement of rock bolts is not obvious when the length is less than 0.5r0, however, the increase of bolt length is not efficient in preventing rock breakage when the length exceeds 1.0r0-1.2r0. Therefore, a reasonable efficient bolt length is suggested under the specific conditions of this study.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geotechnical Engineering and Engineering Geology
Authors
Huaning Wang, Guo Xiao, Mingjing Jiang, Giovanni Battista Crosta,