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Rock Mechanics and Rock Engineering

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23-11-2018 | Original Paper

Shear Characteristics of Cuneiform Reaming Anchorage Bolts in Coal Mine Roadways

Authors: Shaowei Liu, Mengxiong Fu, Housheng Jia, Wenbin Li

Published in: Rock Mechanics and Rock Engineering | Issue 6/2019

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Abstract

Shear failure is the main failure mode of anchorage bolts in coal mines. To improve ground control, it is crucial to improve the shear strength of roadway anchorage systems. In this study, theoretical analysis, numerical simulation and laboratory experiments were carried out to study the shear characteristics of the cuneiform reaming anchorage. The results show that the cuneiform reaming anchorage can reduce the maximum shear stress on the cross section of the anchorage to improve the shear strength. The stress concentration near the joint planes can be transferred to middle parts of the bolts. Moreover, the cuneiform structure can also prolong the period in which the shear load of the anchorage decreases and shorten the period in which the shear load increases, thus reducing the shear load of the anchorage. This paper provides a new economical and practical method for raising the shear strength of an anchorage system and enhancing roadway stability.

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Title: Shear Characteristics of Cuneiform Reaming Anchorage Bolts in Coal Mine Roadways
Authors: Shaowei Liu
Mengxiong Fu
Housheng Jia
Wenbin Li
Publication date: 23-11-2018
Publisher: Springer Vienna
Published in: Rock Mechanics and Rock Engineering / Issue 6/2019
Print ISSN: 0723-2632
Electronic ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-018-1670-3

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