Geomechanics and Engineering

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Simulation study on porosity disturbance of ultra-large-diameter jet borehole excavation based on water jet coal wetting and softening model

  • Guo, Yan L. (School of Management, China University of Mining and Technology(Beijing)) ;
  • Liu, Hai B. (School of Management, China University of Mining and Technology(Beijing)) ;
  • Chen, Jian (College of Mining Engineering, North China University of Science and Technology) ;
  • Guo, Li W. (College of Mining Engineering, North China University of Science and Technology) ;
  • Li, Hao M. (College of Engineering, Huazhong Agricultural University)
  • Received : 2021.06.21
  • Accepted : 2022.06.07
  • Published : 2022.07.25
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Abstract

This study proposes a method to analyze the distribution of coal porosity disturbances after the excavation of ultra-large-diameter water jet boreholes using a coal wetting and softening model. The high-pressure jet is regarded as a short-term high-pressure water injection process. The water injection range is the coal softening range. The time when the reference point of the borehole wall is shocked by the high-pressure water column is equivalent to the time of high-pressure water injection of the coal wall. The influence of roadway excavation with support and borehole diameter on the ultra-large-diameter jet drilling excavation is also studied. The coal core around the borehole is used to measure the gas permeability for determining the porosity disturbance distribution of the coal in the sampling plane to verify the correctness of the simulation results. Results show that the excavation borehole is beneficial to the expansion of the roadway excavation disturbance, and the expansion distance of the roadway excavation disturbance has a quadratic relationship with the borehole diameter. Wetting and softening of the coal around the borehole wall will promote the uniform distribution of the overall porosity disturbance and reduce the amplitude of disturbance fluctuations.

Keywords

Acknowledgement

This study was supported by the Central Guidance on Local Science and Technolog Development Fund of Hebei Province (226Z4601G), National Natural Science Foundation of China (52174182), Hebei Province Key R&D Program (21376202D), Natural Science Foundation of Hebei Province (E2020209074).

References

  1. Chen, J., Cheng, W. and Wang, G. (2020b), "Simulation of the meso-macro-scale fracture network development law of coal water injection based on a SEM reconstruction fracture COHESIVE model", Fuel, 119475. https://doi.org/10.1016/j.fuel.2020.119475.
  2. Chen, J., Guo, L., Hu, Y. and Chen, Y. (2018), "Internal structure of a jet nozzle for coalbed methane mining based on airfoil curves", J. Shock Vib., 2018. http://orcid.org/0000-0002-5043-9834.
  3. Chen, J., Jiang, W., Wang, Q. and Zhang, Y. (2019), "Peridynamic analysis of drill-induced borehole damage", Eng. Fail. Anal., 104, 47-66. https://doi.org/10.1016/j.engfailanal.2019.05.028.
  4. Chen, Z., Li, X., Dusseault, M.B. and Weng, L. (2020a), "Effect of excavation stress condition on hydraulic fracture behaviour", Eng. Fract. Mech. 106871. https://doi.org/10.1016/j.engfracmech.2020.106871.
  5. Cui, L., Zheng, J.J., Dong, Y.K., Zhang, B. and Wang, A. (2017), "Prediction of critical strains and critical support pressures for circular tunnel excavated in strain-softening rock mass", Eng. Geol., 224, 43-61. https://doi.org/10.1016/j.enggeo.2017.04.022.
  6. Duan, K., Wu, W. and Kwok, C.Y. (2018), "Discrete element modelling of stress-induced instability of directional drilling boreholes in anisotropic rock", Tunn. Undergr. Sp. Tech., 81, 55-67. https://doi.org/10.1016/j.tust.2018.07.001.
  7. Feng, R., Balling, N. and Grana, D. (2020), "Lithofacies classification of a geothermal reservoir in Denmark and its facies-dependent porosity estimation from seismic inversion", Geothermics, 87, 101854. https://doi.org/10.1016/j.geothermics.2020.101854.
  8. de Figueiredo, L.P., Grana, D., Santos, M., Figueiredo, W., Roisenberg, M. and Neto, G.S. (2017), "Bayesian seismic inversion based on rock-physics prior modeling for the joint estimation of acoustic impedance, porosity and lithofacies", J. Comput. Phys., 336, 128-142. https://doi.org/10.1016/j.jcp.2017.02.013.
  9. Gunaydin, O. and Cetin, H. (2020), "Determination of stress distribution on active fault by means of Casagrande method; an innovative approach", Soil Dyn. Earthq. Eng., 129, 105920. https://doi.org/10.1016/j.soildyn.2019.105920.
  10. Hao, Y. and Azzam, R. (2005), "The plastic zones and displacements around underground openings in rock masses containing a fault", Tunn. Undergr. Sp. Tech., 20(1), 49-61. https://doi.org/10.1016/j.tust.2004.05.003.
  11. Keramatikerman, M., Chegenizadeh, A. and Nikraz, H. (2017), "An investigation into effect of sawdust treatment on permeability and compressibility of soil-bentonite slurry cut-off wall", J. Cleaner Production, 162, 1-6. https://doi.org/10.1016/j.jclepro.2017.05.160.
  12. Kim, K., Rutqvist, J. and Birkholzer, J. (2020), "Lattice modeling of excavation damage in argillaceous clay formations: Influence of deformation and strength anisotropy", Tunn. Undergr. Sp. Tech., 98, 103196. https://doi.org/10.1016/j.tust.2019.103196.
  13. Komurlu, E., Kesimal, A. and Demir, S. (2016), "Experimental and numerical analyses on determination of indirect (splitting) tensile strength of cemented paste backfill materials under different loading apparatus", Geomech. Eng., 10(6), 775-791. https://doi.org/10.12989/gae.2016.10.6.775.
  14. Kong, X., Wang, E., Liu, X., Li, N., Chen, L., Feng, J., Kong, B., Li, D. and Liu, Q. (2016), "Coupled analysis about multi-factors to the effective influence radius of hydraulic flushing: application of response surface methodology", J. Natural Gas Sci. Eng., 32, 538-548. https://doi.org/10.1016/j.jngse.2016.04.043.
  15. Latchoumi, T., Balamurugan, K., Dinesh, K. and Ezhilarasi, T. (2019), "Particle swarm optimization approach for waterjet cavitation peening", Measurement, 141, 184-189. https://doi.org/10.1016/j.measurement.2019.04.040.
  16. Liu, D., He, M. and Cai, M. (2018), "A damage model for modeling the complete stress-strain relations of brittle rocks under uniaxial compression", Int. J. Damage Mech., 27(7), 1000-1019. https://doi.org/10.1177/1056789517720804.
  17. Lu, H., Gutierrez, M. and Kim, E. (2022), "Empirical approach for reliability evaluation of tunnel excavation stability using the Q rock mass classification system", Undergr. Sp., 2467-9674, https://doi.org/10.1016/j.undsp.2022.01.001.
  18. Liu, H., Lin, B. and Jiang, C. (2019), "A new method for determining coal seam permeability redistribution induced by roadway excavation and its applications", Process Safety and Environmental Protection, 131, 1-8. https://doi.org/10.1016/j.psep.2019.08.019.
  19. Lu, Y., Huang, F., Liu, X. and Ao, X. (2015), "On the failure pattern of sandstone impacted by high-velocity water jet", Int. J. Impact Eng., 76, 67-74. https://doi.org/10.1016/j.ijimpeng.2014.09.008.
  20. Qi, D., Li, L. and Jiao, Y. (2018), "The stress state around an elliptical borehole in anisotropy medium", J. Petroleum Sci. Eng., 166, 313-323. https://doi.org/10.1016/j.petrol.2018.03.013.
  21. Rehman, H., Naji, A.M., Ali, W., Junaid, M., Abdullah, R.A. and Yoo, H.K. (2020), "Numerical evaluation of new Austrian tunneling method excavation sequences: A case study", Int. J. Min. Sci. Tech., 30(3), 381-386. https://doi.org/10.1016/j.ijmst.2020.03.009.
  22. Ren, F., Fang, T. and Cheng, X. (2020), "Study on rock damage and failure depth under particle water-jet coupling impact", Int. J. Impact Eng., 139, 103504. https://doi.org/10.1016/j.ijimpeng.2020.103504.
  23. Salimzadeh, S., Grandahl, M., Medetbekova, M. and Nick, H. (2019), "A novel radial jet drilling stimulation technique for enhancing heat recovery from fractured geothermal reservoirs", Renew. Energ., 139, 395-409. https://doi.org/10.1016/j.renene.2019.02.073.
  24. Simpson, G., Gueguen, Y. and Schneider, F. (2001), "Permeability enhancement due to microcrack dilatancy in the damage regime", J. Geophys. Res. Solid Earth, 106(3), 3999-4016. https://doi.org/10.1029/2000JB900194.
  25. Wang, X. and Cai, M. (2016), "FLAC/SPECFEM2D coupled numerical simulation of wavefields near excavation boundaries in underground mines", Comput. Geosci., 96, 147-158. https://doi.org/10.1016/j.cageo.2016.08.010.
  26. Wang, X., Yuan, W., Yan, Y. and Zhang, X. (2020), "Scale effect of mechanical properties of jointed rock mass: a numerical study based on particle flow code", Geomech. Eng., 21(3), 259-268. https://doi.org/10.12989/gae.2020.21.3.259.
  27. Wu, N., Liang, Z., Zhou, J. and Zhang, L. (2020), "Energy evolution characteristics of coal specimens with preformed holes under uniaxial compression", Geomech. Eng., 20(1), 55-66. https://doi.org/10.12989/gae.2020.20.1.055.
  28. Wu, X., Jiang, Y. and Guan, Z. (2018), "A modified strain-softening model with multi-post-peak behaviours and its application in circular tunnel", Eng. Geol., 240, 21-33. https://doi.org/10.1016/j.enggeo.2018.03.031.
  29. Xu, J., Zhou, R., Song, D., Li, N., Zhang, K. and Xi, D. (2019), "Deformation and damage dynamic characteristics of coal-rock materials in deep coal mines", Int. J. Damage Mech., 28, no. 1, 58-78. https://doi.org/10.1177/1056789517741950.
  30. Yue, J., Wang, Z. and Chen, J. (2019), "Investigation of timing characteristics of the imbibition height of remolded coal without gas", Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 41(2), 156-166. https://doi.org/10.1080/15567036.2018.1505980.
  31. Zhao, Y., Lin, B., Liu, T., Kong, J. and Zheng, Y. (2020), "Gas flow in hydraulic slotting-disturbed coal seam considering stress relief induced damage", J. Natural Gas Sci. Eng., 103160. https://doi.org/10.1016/j.jngse.2020.103160.
  32. Zhang, Y. and Zou, Q. (2018), "A prediction model for the slot depth of high pressure water jet", Results in Phys., 11, 1105-1109. https://doi.org/10.1016/j.rinp.2018.11.020.
  33. Zhao, J., Zhang, G., Xu, Y., Lin, A., Zhao, J. and Yang, D. (2019), "Enhancing rate of penetration in a tight formation with high-pressure water jet (HPWJ) via a downhole pressurized drilling tool", J. Petroleum Sci. Eng., 174, 1194-1207. https://doi.org/10.1016/j.petrol.2018.11.042.
  34. Zheng, Y., Chen, C., Liu, T., Song, D. and Meng, F. (2019), "Stability analysis of anti-dip bedding rock slopes locally reinforced by rock bolts", Eng. Geol., 251, 228-240. https://doi.org/10.1016/j.enggeo.2019.02.002.