Mechanics response of anchorage body under different pullout velocity tests
WEI Sijiang
WU Yifan
ZHAO Shangning
LI Huihui
Abstract：In order to explore the mechanics response law of anchorage body under dynamic loading,by means of anchorage device made in laboratory and universal testing machine,mechanics response characteristics of anchorage body under different pullout out rates was researched. The results show that, displacement and strength on peak point increases with increasing of pullout rate,but the increase range slows with the loading rate increasing.When pullout rate is a fixed value,there is deboned failure on anchorage segment from bore top to bottom,and roughness of bore wall has great impact on residual cohesion.Monitoring of acoustic emission show that,ring counts and energy of acoustic emission begin to increase sharply nearby peak point,and high ring counts and energy events only appear near peak point.Phenomena of acoustic emission of all specimens on the flat stage are similar.Numbers and energy of cracks increase with pullout rate increasing.Mostly failure e-vents happen from bore top to its bottom,or alternately.With the increasing of pullout velocity,failure events transfer from bore top to its bottom gradually.According to the roadway of rock burst,extended anchorage,high- er roughness of bore wall and higher density of resign are good to the control of adjacent rock.
Keywords：anchorage bodypullout ratemechanics responsecharacteristics of failure
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 17-23 )