Strategy for high stress environment in longwall entries
- 10.2991/icmmita-16.2016.104How to use a DOI?
- High stress; longwall entry; split-level; mechanical tests.
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.
- © 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/).
Cite this article
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 -