THERMAL SCIENCE

International Scientific Journal

THE NON-DARCY CHARACTERISTICS OF FAULT WATER INRUSH IN KARST TUNNEL BASED ON FLOW STATE CONVERSION THEORY

ABSTRACT
The fault water inrush is a key factor which leads to tunnel construction in karst regions. Based on the fluid mechanics principles, the paper addresses a numer­ical coupled model for karst fault tunnel with COMSOL Multiphysics software. Besides, the Darcy law equation, Brinkman equation, and Navier-Stokes equation are inserted to stimulate the steady flow of aquifer, the non-linear seepage of fault and the free flow in tunnel excavating area in software, respectively. Then, the pres­sure and flow velocity in three flow fields are analyzed under different permeability ratios in numerical model. It is shown that the fault permeability is the key factor affecting water inrush, and that the pressure and flow velocity change visibly in adjacent domains between two flow fields.
KEYWORDS
PAPER SUBMITTED: 2020-03-29
PAPER REVISED: 2020-06-25
PAPER ACCEPTED: 2020-08-09
PUBLISHED ONLINE: 2021-12-24
DOI REFERENCE: https://doi.org/10.2298/TSCI2106415C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4415 - 4421]
REFERENCES
  1. Shen, W. L., et al., Prediction of Relative Displacement for Entry Roof with Weak Plane Under the Effect of Mining Abutment Stress, Tunnelling and Underground Space Technology, 71 (2018), Jan., pp. 309-317
  2. Xue, Y., et al., Productivity Analysis of Fractured Wells in Reservoir of Hydrogen and Carbon Based on Dual-Porosity Medium Model, International Journal of Hydrogen Energy, 45 (2020), 39, pp. 20240-20249
  3. Zhang, Y., et al., The Application of Short-Wall Block Backfill Mining to Preserve Surface Water Resources in Northwest China, Journal of Cleaner Production, 261 (2020), July, pp. 121232
  4. Yang, T. H., et al., A Non-Linear Flow Model Based on Flow Translation and Its Application in the Mechanism Analysis of Water Inrush Through Collapse Pillar, Journal of China Coal Society, 42 (2017), 2, pp. 315-321
  5. Li, L. J., et al., Mechanism of Water-Inrush Through Fault, Journal of China Coal Society, 2 (1996), 2, pp. 119-123
  6. Xue, Y., et al., Investigation of the Influence of Gas Fracturing on Fracturing Characteristics of Coal Mass and Gas Extraction Efficiency based on a Multi-physical Field Model, Journal of Petroleum Science and Engineering, 206 (2021), Nov., 109018
  7. Li, L. C., et al., Numerical Analysis of Pathway Formation of Groundwater Inrush from Faults in Coal Seam Floor, Chinese Journal of Rock Mechanics and Engineering, 28 (2009), 2, pp. 290-297
  8. Sun, J., et al., Floor Fault Water-Inrush Prediction Based on Catastrophe Analysis of Micro-Seismic Signals, Journal of China Coal Society, 38 (2013), 8, pp. 1404-1410
  9. Liu, H. L., et al., Investigation on Failure and Water Inrush from Roof of 5th Coal Seam in Fangezhuang Coal Mine, Journal of Mining & Safety Engineering, 26 (2009), 3, pp. 332-335
  10. Li, H. Y., et al., The Seepage-Flowing Conversion Mechanism of the Fault Lagging Water Inrush and Its Numerical Simulation, Journal of Mining & Safety Engineering, 34 (2017), 2, pp. 323-329
  11. Guo, W. J., et al., Study on Fault Water Inrush Mechanism and Nonlinear Seepage-Stress Coupling, Journal of Shandong University of Science and Technology, 36 (2017), 6, pp. 1-7
  12. Cao, Z. Z., et al., Joint Bearing Mechanism of Coal Pillar and Backfilling Body in Roadway Backfilling Mining Technology, Computers, Materials & Continua, 54 (2018), 2, pp. 137-159
  13. Xue, Y., et al., Analysis of Deformation, Permeability and Energy Evolution Characteristics of Coal Mass around Borehole after Excavation, Natural Resources Research, 29 (2020), 5, pp. 3159-3177
  14. Liu, J., et al., Numerical Evaluation on Multiphase Flow and Heat Transfer during Thermal Stimulation Enhanced Shale Gas Recovery, Applied Thermal Engineering, 178 (2020), Sept., 115554

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, 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