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.
X. Liu et al., "Time Effect of Water Injection on the Mechanical Properties of Coal and its Application in Rockburst Prevention in Mining," Energies, vol. 10, no. 11, MDPI, Nov 2017.
The definitive version is available at https://doi.org/10.3390/en10111783
Keywords and Phrases
Coal; Coal deposits; Coal mines; Computer simulation; Mechanical properties; Numerical models; Oil well flooding; Porosity; Rock bursts; Underground structures; Coal seam water injections; Injection durations; On-site tests; Practical importance; Prevention and controls; Rock burst preventions; Soaking test; Time effect; Water injection; Numerical simulation; Rockburst
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Article - Journal
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01 Nov 2017