Possible Effect of Main Roof Settlement on Outburst Hazard in Case of Gas Hydrate Dissociation during Coal Mining

Possible Effect of Main Roof Settlement on Outburst Hazard in Case of Gas Hydrate Dissociation... The results of physical modeling of geomechanical processes in outer zones of coal beds with the main roof caveable with difficulty. The scope of the modeling embraces the inlfuence seams on gas release by gas temperature and pressure variation during stage-wise outlet of gas from a pressure bomb, which simulates cyclical mechanical impact on a coal seam in the zones of a gas pocket. It is found that the low-frequency (2.0–4.5 Hz) attenuating vibrations generated in the main roof can induce both secondary rock mass disintegration as well as methane desorption and decomposition of gas hydrates (if present) accompanied by an increases in gas pressure and in number of gas-dynamic events in outer zones of coal beds. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Mining Science Springer Journals

Possible Effect of Main Roof Settlement on Outburst Hazard in Case of Gas Hydrate Dissociation during Coal Mining

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Pleiades Publishing, Ltd.
Subject
Earth Sciences; Geotechnical Engineering & Applied Earth Sciences; Geophysics/Geodesy; Earth Sciences, general; Mineral Resources
ISSN
1062-7391
eISSN
1573-8736
D.O.I.
10.1134/S1062739117052801
Publisher site
See Article on Publisher Site

Abstract

The results of physical modeling of geomechanical processes in outer zones of coal beds with the main roof caveable with difficulty. The scope of the modeling embraces the inlfuence seams on gas release by gas temperature and pressure variation during stage-wise outlet of gas from a pressure bomb, which simulates cyclical mechanical impact on a coal seam in the zones of a gas pocket. It is found that the low-frequency (2.0–4.5 Hz) attenuating vibrations generated in the main roof can induce both secondary rock mass disintegration as well as methane desorption and decomposition of gas hydrates (if present) accompanied by an increases in gas pressure and in number of gas-dynamic events in outer zones of coal beds.

Journal

Journal of Mining ScienceSpringer Journals

Published: Jun 4, 2018

References

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