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Energies 2017, 10(11), 1783; https://doi.org/10.3390/en10111783

Time Effect of Water Injection on the Mechanical Properties of Coal and Its Application in Rockburst Prevention in Mining

1
Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China
2
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
3
Department of Mining Engineering and Metallurgical Engineering, Western Australian School of Mines, Curtin University, Kalgoorlie, WA 6430, Australia
4
Institute of Rock and Soil Mechanic, Chinese Academy of Sciences, Wuhan 430071, China
*
Author to whom correspondence should be addressed.
Received: 4 September 2017 / Revised: 20 October 2017 / Accepted: 31 October 2017 / Published: 6 November 2017
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Abstract

Coal seam water injection is widely used to prevent rockbursts in coal mines, and the duration of water injection is an important parameter related to the effectiveness of rockburst prevention, making it of practical importance to optimize the effective water injection duration. This paper presents the test results of the mechanical properties and pore structure of samples with different soaking time, obtained from a working face where rockburst occurred. Soaking time changes the mechanical properties of samples, and this time effect differs with the coal size (from centimeter to nanometer size). Results of numerical simulation and on-site tests in the Changgouyu coal mine demonstrated that water injection can effectively soften coal bodies and release or transfer stresses, and the time effect of water injection on rock prevention and control is apparent. View Full-Text
Keywords: coal seam water injection; rockburst; soaking test; porosity; numerical simulation; on-site test; time effect coal seam water injection; rockburst; soaking test; porosity; numerical simulation; on-site test; time effect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, X.; Xu, G.; Zhang, C.; Kong, B.; Qian, J.; Zhu, D.; Wei, M. Time Effect of Water Injection on the Mechanical Properties of Coal and Its Application in Rockburst Prevention in Mining. Energies 2017, 10, 1783.

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