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

Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu and Mingyao Wei
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Xiaofei Liu: Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China
Guang Xu: Department of Mining Engineering and Metallurgical Engineering, Western Australian School of Mines, Curtin University, Kalgoorlie, WA 6430, Australia
Chong Zhang: Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China
Biao Kong: School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Jifa Qian: Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China
Dong Zhu: School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Mingyao Wei: Institute of Rock and Soil Mechanic, Chinese Academy of Sciences, Wuhan 430071, China

Energies, 2017, vol. 10, issue 11, 1-26

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.

Keywords: coal seam water injection; rockburst; soaking test; porosity; numerical simulation; on-site test; time effect (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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