Strategy for high stress environment in longwall entries

DOI

10.2991/icmmita-16.2016.104How to use a DOI?

Keywords

High stress; longwall entry; split-level; mechanical tests.

Abstract

Longwall mining is the main method for coal extraction in China. However, development entry support on both ends of a longwall panel has always been a difficulty to cope with, especially in deep high stress conditions. In order to improve the stress environment for longwall entries, an innovative mining method called longwall mining with split-level gateroads (LMSG) is proposed in this paper. The entries on both ends of a LMSG panel are split-level, i.e., located at different height within a coal seam with a gradually elevated section on one end of the panel which make the two panels are offset. For the case study in this paper, the application of the method is extended to relatively thin coal seam to cope with problems in deep high stress conditions, that is, the headgate is driven in coal seam while the tailgate driven in roof strata. Mechanical tests and physical modeling were carried out and the results show that the stress environment is significantly improved.

Copyright

© 2017, 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  - Baozhu Liu
AU  - Jingli Zhao
AU  - Pengfei Wang
PY  - 2017/01
DA  - 2017/01
TI  - Strategy for high stress environment in longwall entries
BT  - Proceedings of the 2016 4th International Conference on Machinery, Materials and Information Technology Applications
PB  - Atlantis Press
SP  - 561
EP  - 565
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmmita-16.2016.104
DO  - 10.2991/icmmita-16.2016.104
ID  - Liu2017/01
ER  -