A New Design of Energy Absorbing Bolt

Rock movement caused by external explosion loading can damage the nearby tunnel or cavern.To avoid damage, energy absorbing bolts with high load-displacement and large energy absorptioncapacities are required. The deformation and friction of the bolt absorb energy during the rock movementand prevent...

Full description

Saved in:
Bibliographic Details
Published in:Key Engineering Materials 2016-12, Vol.725, p.162-167
Main Authors: Lu, Guo Xing, Zhao, Zhi Ye, Liu, Si Cong, Zhou, Ying Xin, Shu, Dong Wei
Format: Article
Language:English
Subjects:
Boreholes
Computer simulation
Damage
Design engineering
Energy absorption
Friction
Plastic deformation
Rock
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Rock movement caused by external explosion loading can damage the nearby tunnel or cavern.To avoid damage, energy absorbing bolts with high load-displacement and large energy absorptioncapacities are required. The deformation and friction of the bolt absorb energy during the rock movementand preventing the structure from damage. To maximize the energy absorption capacity in the limitedspace inside the borehole, we developed a new bolt that utilizes the friction and plastic deformation ofthe sleeve. To develop the new bolt, FE simulation in Abaqus was used to improve designs beforefabrication. Two prototypes of the new design was fabricated and tested by static pull test. The resultsshowed the bolts yielded in the desired way. The experimental results prove the new bolt is capable ofabsorbing large amount of energy and accommodating large displacement.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.725.162