Simulation Study of Dynamic Response of Bolt Support in Impact Roadway

DOI

10.2991/mining-14.2014.14How to use a DOI?

Keywords

impact load, mechanized caving roadway, bolt support, dynamic response, numerical simulation

Abstract

Coal burst and mine earthquake frequently occur with high strength in impact roadway. Bolting system will produce a certain dynamic response under the impact load disturbance. Bolts will be damaged and rock will be instability when it serious. How to design bolting system in impact roadway is a major technical problem that has not been solved. This paper analyzes the dynamic response of bolt supporting in impact and mechanized caving roadway by FLAC3D.Then it gets the bolt axial force, shear stress of anchor agent and deformation of roadway variation with time and space. This study provides the design basis for the optimizing impact roadway bolting and improves control effect of bolting system. The results show that under the impact load the degree of dynamic response of anchor and roadway has great relationship with the distance between the measuring point and the power source. It reflects sensitively. Tilt bolts affect greatly. Threads and components of bolt tail are easily damaged, while anchoring agent prone to shear failure. Therefore, the bolt of rock burst roadway should have high prestress and high strength. While the choice of bolt end member, anchoring agent, the let press member and bolt elongation with high energy absorption properties are also very important.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Fan Liu
AU  - Wenjie Liu
AU  - Tongxu Wang
PY  - 2014/10
DA  - 2014/10
TI  - Simulation Study of Dynamic Response of Bolt Support in Impact Roadway
BT  - Proceedings of the Taishan Academic Forum – Project on Mine Disaster Prevention and Control
PB  - Atlantis Press
SP  - 93
EP  - 98
SN  - 2352-5401
UR  - https://doi.org/10.2991/mining-14.2014.14
DO  - 10.2991/mining-14.2014.14
ID  - Liu2014/10
ER  -