Articles | Volume 11, issue 4
Research article
26 Jul 2020
Research article |  | 26 Jul 2020

Frictional slip weakening and shear-enhanced crystallinity in simulated coal fault gouges at slow slip rates

Caiyuan Fan, Jinfeng Liu, Luuk B. Hunfeld, and Christopher J. Spiers


Interactive discussion

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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Jinfeng Liu on behalf of the Authors (20 Jun 2020)  Author's response    Manuscript
ED: Publish as is (23 Jun 2020) by Jianye Chen
ED: Publish as is (26 Jun 2020) by Susanne Buiter(Executive Editor)
Short summary
Coal is an important source rock for natural gas recovery, and its frictional properties play a role in induced seismicity. We performed experiments to investigate the frictional properties of bituminous coal, and our results show that the frictional strength of coal became significantly weakened with slip displacement, from a peak value of 0.5 to a steady-state value of 0.3. This may be caused by the development of shear bands with internal shear-enhanced molecular structure.