Ventilation Method Assessment of the Average Permeability of the Fractured Granite Rock Mass around Tunnel
- DOI
- 10.2991/icimm-15.2015.89How to use a DOI?
- Keywords
- Permeability;Mechanical Analysis;Darcy
- Abstract
Focused on a single end granite tunnel, the feasibility of the assessment method of the average permeability of wall rock based on the Darcy’s law has been explored in this paper. In according with the Darcy seepage phenomenon of low-pressure driving gas in porous medium, under the pressurized ventilation, the radon concentration can reduce to the level of winter by summer, so as to determine the critical point of pressurization. According to the air volume variation and other data in the tunnel section, the scope of the average permeability of wall rock can be determined. This method is suitable for the rapid assessment of the average permeability of the wall rock around the underground tunnel with complex structure, and can effectively avoid the macroscopic lack of rock mass permeability measured by the traditional laboratory ratio test of rock samples and in-situ water / gas injection in borehole.
- Copyright
- © 2015, 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 - Shuguang Wang AU - Jincai Zhu AU - Jinchao Yang AU - Jianhua Chen AU - Wei Yang PY - 2015/07 DA - 2015/07 TI - Ventilation Method Assessment of the Average Permeability of the Fractured Granite Rock Mass around Tunnel BT - Proceedings of the 5th International Conference on Information Engineering for Mechanics and Materials PB - Atlantis Press SP - 468 EP - 475 SN - 2352-5401 UR - https://doi.org/10.2991/icimm-15.2015.89 DO - 10.2991/icimm-15.2015.89 ID - Wang2015/07 ER -