International Scientific Journal

Thermal Science - Online First

External Links

online first only

The dynamic evolution analysis of gas seepage field during the mining process of protective layer

The process of gas extraction by the protective layer mining is actually the multi-field coupling process. In this paper, the governing equations of the gas diffusion and seepage in the damaged coal and rock mass under the condition of the coupling action of gas and solid are established. A multi-field coupling analytical program is compiled by the FORTRAN language. The distribution and dynamic evolution law of the gas seepage field of the protected layer are calculated and analyzed. The result will provide the data support for the gas extraction design.
PAPER REVISED: 2018-07-28
PAPER ACCEPTED: 2018-08-12
  1. Sheng W., et al., Analysis of occurrence regularity and causes of coal-gas dynamic disasters, Journal of North China Institute of Science and Technology, 11 (2014), 1, pp. 9-13.
  2. Wu, S.Y., et al., Study on the movement property of coal seam methane. Journal of China Coal Society, 24(1999,), 1, pp. 65-69.
  3. Yin G., et al., A coupled elastoplastic damage model for gas-saturated coal. Chinese Journal of Rock Mechanics and Engineering, 28(2009), 5, pp.994-999.
  4. Cheng H. M., et al., 3-D dynamic evolution analysis of coal-rock damaged field and gas seepage field during the gas extraction process, Journal of Natural Gas Science and Engineering, 56(2018), pp. 444-454.
  5. Zhang H., et al., How sorption-induced matrix deformation affects gas flow in coal seams: a new FE model, International Journal of Rock Mechanics and Mining Sciences,45(2008), 8, pp. 1226-1236
  6. Zhao C., et al., Finite element modelling of methane gas migration in coal seams. Computers & structures, 55(1995), 4, pp.625-629.
  7. Qian J., et al., Two damage models of concrete and its application. Journal of Hohai University, 3(1989), pp.40-47.
  8. Mazars J., Mechanical damage and fracture of concrete structure. Advances in fracture mechanics, 4(1982), pp.1502-1509.
  9. Wu G., et al., Damage mechanical analysis of unloading failure of intact rock mass under complex stress state. Journal of Hohai University, 25(1997), 3, pp. 44-49.
  10. Yang Q. L., et al., Theory of methane diffusion from coal cuttings and its application, Journl of China Coal Society,11(1986) , 3, pp. 62-70