THERMAL SCIENCE

International Scientific Journal

NUMERICAL SIMULATION OF DAMAGE AND PERMEABILITY EVOLUTION MECHANISM OF COAL SEAM UNDER MICROWAVE RADIATION

ABSTRACT
Microwave heating is an effective method to improve the recovery rate of coalbed CH4. In this study, a fully coupled electromagnetic thermodynamic model was developed to study the effects of coal compaction, thermal expansion and thermal gas desorption on coal deformation. The simulation results show that although in the initial stage, the decrease of gas pressure by microwave is not obvious, the distribution of gas pressure in coal seam is obviously affected by microwave after a period of time. The microwave can also affect the mineral composition of rocks, cause rock damage, promote the development of cracks, and promote the increase of permeability
KEYWORDS
PAPER SUBMITTED: 2018-05-12
PAPER REVISED: 2018-06-21
PAPER ACCEPTED: 2018-08-21
PUBLISHED ONLINE: 2019-04-14
DOI REFERENCE: https://doi.org/10.2298/TSCI180512133X
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE 3, PAGES [1355 - 1361]
REFERENCES
  1. Xue, Y., et al., The influence of the backfilling roadway driving sequence on the rockburst risk of a coal pillar based on an energy density criterion, Sustainability, 10 (2018), 2, pp. 2609
  2. Chen, D., et al., Study on the microwave effect on the physical and mechanical properties of coal, International Journal of Oil, Gas and Coal Technology, 18 (2018), 1-2, pp. 255-275.
  3. Liu, S., et al., Theoretical Analysis and Experimental Verification of Microwave Radiation Features of Fractured Rock, PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM, 1 (2014), 2, pp. 1393-1400
  4. LOVÁS, M., et al., The application of microwave energy in mineral processing-a review, Acta Montanistica Slovaca, 16 (2011), 2, pp. 137-148
  5. Liu, S., et al., The Impact of Coal Sample Characteristics on Microwave Pyrolysis. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 37 (2015), 17, pp. 1829-1835
  6. Liang, B., et al., Experimental on the law of coal deformation and permeability under desorption and seepage, Journal of China University of Mining & Technology, 47 (2018), 4, pp. 935-941
  7. Xue, Y., et al., An elastoplastic model for gas flow characteristics around drainage borehole considering post-peak failure and elastic compaction, Environmental Earth Sciences, 77 (2018), 19, pp. 669
  8. Su, W. H., et al., Effect of longwall-induced subsurface deformations on shale gas well casing stability under deep covers, International Journal of Mining Science and Technology, 29 (2019), 1, pp. 3-8
  9. Liu, K., et al., A nonlinear viscoelastic-plastic creep model of soft rock with unsteady parameters, Journal of China University of Mining & Technology, 47 (2018), 4, pp. 921-928
  10. Peng, S. S., et al., Underground ground control monitoring and interpretation, and numerical modeling, and shield capacity design, International Journal of Mining Science and Technology, 29 (2019), 1, pp. 79-85
  11. Xue, Y., et al., Evaluation of the Non-Darcy Effect of Water Inrush from Karst Collapse Columns by Means of a Nonlinear Flow Model, Water, 10 (2018), 9, pp. 1234
  12. Li, H., et al., A fully coupled electromagnetic-thermal-mechanical model for coalbed methane extraction with microwave heating, Journal of Natural Gas Science and Engineering, 46 (2017), 10, pp. 830-844

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence