Control design of roof rock for advance blasting in roof on gob-side entry without roadside support

DOI

10.2991/mining-14.2014.33How to use a DOI?

Keywords

gob-side entry without roadside support, advance blasting in roof, roof movement, strata control, roadway support.

Abstract

In order to solve the problem that when using gob-side entry retaining, the overall cost of roadside support was expensive, the construction technology was very complicated and the stability of roof rock destroyed easily, gob-side entry retaining without roadside support that based upon the roof control theory was presented. According to the analysis of the roof movement process accompanied with advance blasting in roof on gob-side entry retaining without roadside support, the paper summed up a conclusion that roof movement consisted of two periods, which was active period and stable period. The motion state of roof was dominated by revolving in active period, while parallel subsidence in stable period. For roof, in order to improve the capability of resisting deformation, the roadway support was required high strength and constructed timely, so the super-long anchor cable with high strength combined with concrete filled steel tube was a better choice. Then, the basic mechanical model was built up, and maximum roadway support force was solved. Additionally, the research results were applied to practice successfully

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  - Kaizhi Zhang
AU  - Baocheng Liu
PY  - 2014/10
DA  - 2014/10
TI  - Control design of roof rock for advance blasting in roof on gob-side entry without roadside support
BT  - Proceedings of the Taishan Academic Forum – Project on Mine Disaster Prevention and Control
PB  - Atlantis Press
SP  - 211
EP  - 217
SN  - 2352-5401
UR  - https://doi.org/10.2991/mining-14.2014.33
DO  - 10.2991/mining-14.2014.33
ID  - Zhang2014/10
ER  -