Geomechanics and Engineering

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Application of rock mass index in the prediction of mine water inrush and grouting quantity

  • Zhao, Jinhai (State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology) ;
  • Liu, Qi (State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology) ;
  • Jiang, Changbao (State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology) ;
  • Defeng, Wang (Institute of Mining and Special Civil Engineering, Technical University of Bergakademie Freiberg)
  • Received : 2022.04.23
  • Accepted : 2022.08.16
  • Published : 2022.09.25
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Abstract

The permeability coefficient is an essential parameter for the study of seepage flow in fractured rock mass. This paper discusses the feasibility and application value of using readily available RQD (rock quality index) data to estimate mine water inflow and grouting quantity. Firstly, the influence of different fracture frequencies on permeability in a unit area was explored by combining numerical simulation and experiment, and the relationship between fracture frequencies and pressure and flow velocity at the monitoring point in fractured rock mass was obtained. Then, the stochastic function generation program was used to establish the flow analysis model in fractured rock mass to explore the relationship between flow velocity, pressure and analyze the universal law between fracture frequency and permeability. The concepts of fracture width and connectivity are introduced to modify the permeability calculation formula and grouting formula. Finally, based on the on-site grouting water control example, the rock mass quality index is used to estimate the mine water inflow and the grouting quantity. The results show that it is feasible to estimate the fracture frequency and then calculate the permeability coefficient by RQD. The relationship between fracture frequency and RQD is in accordance with exponential function, and the relationship between structure surface frequency and permeability is also in accordance with exponential function. The calculation results are in good agreement with the field monitoring results, which verifies the rationality of the calculation method. The relationship between the rock mass RQD index and the rock mass permeability established in this paper can be used to invert the mechanical parameters of the rock mass or to judge the permeability and safety of the rock mass by using the mechanical parameters of the rock mass, which is of great significance to the prediction of mine water inflow and the safety evaluation of water inrush disaster management.

Keywords

Acknowledgement

This study was funded by National Natural Science Foundation of China (Grant Nos. 52104203, 51974172, 51904168). Shandong Province Natural Science Foundation Project (ZR2020QE128, ZR2020ME102, ZR2021ME138), Scientific Research Foundation of Key Laboratory of Mining Disaster Prevention and Control (MDPC202012), National Key R&D Program of China (2018YFC0604705), SDUST Research Fund (grant 2018TDJH102), National Natural Science Foundation of China (Grant nos. 51574159, 52074251, 51974172, 51974173, 92058211 and 51804179), Central Universities (No. 842012003), and 111 project (No. B20048). Central Universities (No. 842012003), and 111 project (No. B20048).

References

  1. Annaidh, A.N., Destrade, M., Gilchrist, M.D. and Murphy, J.G. (2013), "Deficiencies in numerical models of anisotropic nonlinearly elastic materials", Biomecha. Model. Mechanobiology, 12(4), 781-791. https://doi.org/10.1007/s10237-012-0442-3.
  2. Cai, X., Cheng, C., Zhao, Y., Zhou, Z. and Wang, S. (2022), "The role of water content in rate dependence of tensile strength of a fine-grained sandstone", Arch. Civil Mech. Eng., 22(1), 1-16. https://doi.org/10.1007/s43452-022-00379-8.
  3. Cai, X., Zhou, Z., Zang, H. and Song, Z. (2020), "Water saturation effects on dynamic behavior and microstructure damage of sandstone: Phenomena and mechanisms", Eng. Geology, 276, 105760. https://doi.org/10.1016/j.enggeo.2020.105760.
  4. Chen, J., Zhao, J., Zhang, S., Zhang, Y., Yang, F. and Li, M. (2020), "An experimental and analytical research on the evolution of mining cracks in deep floor rock mass", Pure Appl. Geophys., 177(11), 5325-5348. https://doi.org/10.1007/s00024-020-02550-9.
  5. Chen, J.P., Fan, J.H. and Liu, D. (2005), "A review and prospect on the application and research of RQD", Rock Soil Mech., 26(S2), 249-252.
  6. Chen, M.Z., Liu, S.C. and Yang, G.Y. (2009), "The development of mining water in flow predict method", Chin. J. Eng. Geophys., 6(1), 68-72.
  7. Cheng, X.G., Qiao, W., Lu, L., Jiang, C.W. and Lei, N. (2020), "Model of mining-induced fracture stress-seepage coupling in coalseam over-burden and prediction of mine inflow", J. China Coal Soc., 45(08), 2890-2900.
  8. Deere, D.U. (1963), "Technical description of rock cores for engineering purposes", Rock Mech. Eng. Geol., 1(1), 18-22.
  9. Du, M.M., Deng, Y.E. and Xu, M. (2009), "Review of methodology for prediction of water yield of mine", Acta Geologica Sinica, 29(1), 70-73.
  10. Euser, B., Rougier, E., Lei, Z., Knight, E.E., Frash, L.P., Carey, J. W., ... & Munjiza, A. (2019), "Simulation of fracture coalescence in granite via the combined finite-discrete element method", Rock Mech. Rock Eng., 52(9), 3213-3227. https://doi.org/10.1007/s00603-019-01773-0.
  11. Ghyasvand, S., Fahimifar, A. and Nejad, F.M. (2022), "On the optimum design of reinforcement systems for old masonry railway tunnels", Geomech. Eng., 28(2), 145-155. https://doi.org/10.12989/gae.2022.28.2.145.
  12. Guo, W.J., Zhao, J.H., Yin, L.M. and Kong, D.Z. (2017), "Simulating research on pressure distribution of floor pore water based on fluid-solid coupling", Arab. J. Geosci., 10(1), 1-14. https://doi.org/10.1007/s12517-016-2770-6.
  13. He, C., Yao, C., Yang, J. et al. (2019), "A 3D model for flow in fractured rock mass based on the equivalent discrete fracture network", Chin. J. Rock Mech. Eng., 38(S1), 2748-275.
  14. Hudson, J.A. and Harrison, J.P. (2000), Engineering Rock Mechanics: An Introduction To The Principles, Elsevier.
  15. Ibishi, G., Genis, M. and Yavuz, M. (2022), "Post-pillars design for safe exploitation at Trepca hard rock mine "(Kosovo) based on numerical modeling", Geomech. Eng., 28(5), 463-475. https://doi.org/10.12989/gae.2022.28.5.463.
  16. Jha, B. and Juanes, R. (2014), "Coupled multiphase flow and poromechanics: A computational model of pore pressure effects on fault slip and earthquake triggering", Water Resour. Res., 50(5), 3776-3808. https://doi.org/10.1002/2013WR015175.
  17. Karatela, E. and Taheri, A. (2018), "Three-dimensional hydro-mechanical model of borehole in fractured rock mass using discrete element method", J. Nat. Gas Sci. Eng., 53, 263-275. https://doi.org/10.1016/j.jngse.2018.02.032.
  18. Khorasani, E., Amini, M., Hossaini, M.F. and Medley, E. (2019), "Evaluating the effects of the inclinations of rock blocks on the stability of bimrock slopes", Geomech. Eng., 17(3), 281-287. https://doi.org/10.12989/gae.2019.17.3.281.
  19. Kim, E., Garcia, A. and Changani, H. (2018), "Fragmentation and energy absorption characteristics of Red, Berea and Buff sandstones based on different loading rates and water contents", Geomech. Eng., 4(2), 151-159. https://doi.org/10.12989/gae.2018.4.2.151.
  20. 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.
  21. Lawal, A.I., Kwon, S., Aladejare, A.E. and Oniyide, G.O. (2022), "Prediction of the static and dynamic mechanical properties of sedimentary rock using soft computing methods", Geomech. Eng., 28(3), 313-324. https://doi.org/10.12989/gae.2022.28.3.313.
  22. Leung, C.T. and Zimmerman, R.W. (2012), "Estimating the hydraulic conductivity of two-dimensional fracture networks using network geometric properties", Trans. Porous Media, 93(3), 777-797. https://doi.org/10.1007/s11242-012-9982-3.
  23. Li, L.P., Chen, D.Y., Li, S.C., Shi, S.S., Zhang, M.G. and Liu, H.L. (2017), "Numerical analysis and fluid-solid coupling model test of filling-type fracture water inrush and mud gush", Geomech. Eng., 13(6), 1011-1025. https://doi.org/10.12989/gae.2017.13.6.1011.
  24. Lin, B. (2010), "Research of water yield prediction of mine about a uranium deposit in north east of guangdong province", Resour. Environ. Eng., 24(3), 293-296.
  25. Liu, Y.Z., Sheng, J.L., Ge, X.R. and Wang, S.L. (2007), "Evaluation of rock mass quality based on fractal dimension of rock mass discontinuity distribution", Yantu Lixue(Rock Soil Mech.), 28(5), 971-975.
  26. Lu, Z.G., Yao, J., Wang, D.S. and Li, L. (2010), "Experimental study on fluid flow characteristic in orthogonal fracture network", J. China Coal Soc., 35(04), 555-558.
  27. Lv, H.Y, Tang, Y.S., Zhang, L.F., Cheng, Z.B. and Zhang, Y.N. (2019), "Analysis for mechanical characteristics and failure models of coal specimens with non-penetrating single crack", Geomech. Eng., 17(4), 355-365. https://doi.org/10.12989/gae.2019.17.4.355.
  28. Mahmoodzadeh, A., Mohammadi, M., Abdulhamid, S.N., Ali, H.F.H., Ibrahim, H.H. and Rashidi, S. (2022), "Forecasting tunnel path geology using Gaussian process regression", Geomech. Eng., 28(4), 359-374, https://doi.org/10.12989/gae.2022.28.4.359.
  29. Maruvanchery, V. and Kim, E. (2019), "Effects of water on rock fracture properties: Studies of mode I fracture toughness, crack propagation velocity, and consumed energy in calcite-cemented sandstone", Geomech. Eng., 17(1), 57-67. https://doi.org/10.12989/gae.2019.17.1.057.
  30. Morrison, K.G., Reynolds, J.K. and Wright, A. (2019), "Subsidence fracturing of stream channel from longwall coal mining causing upwelling saline groundwater and metal-enriched contamination of surface waterway", Water Air Soil Pollut., 230, 1-13. https://doi.org/10.1007/s11270-019- 4082-4.
  31. Mottahedi, A. and Ataei, M. (2019), "Fuzzy fault tree analysis for coal burst occurrence probability in underground coal mining", Tunnel. Underg. Space Technol., 83, 165-174. https://doi.org/10.1016/j.tust.2018.09.029.
  32. Munoz, H., Taheri, A. and Chanda, E.K. (2016), "Pre-peak and post-peak rock strain characteristics during uniaxial compression by 3D digital image correlation", Rock Mech. Rock Eng., 49(7), 2541-2554. https://doi.org/10.1007/s00603-016-0935-y.
  33. Priest, S.D. and Hudson, J.A. (1976), "Discontinuity spacings in rock", Int. J. Rock Mech. Min Sci. Geomech. Abstr., 13(5), 135-148. https://doi.org/10.1016/0148-9062(76)90818-4.
  34. Samanta, M., Punetha, P. and Sharma, M. (2018), "Effect of roughness on interface shear behavior of sand with steel and concrete surface", Geomech. Eng., 14(4), 387-398. https://doi.org/10.12989/gae.2018.14.4.387.
  35. Sweetenham, M.G., Maxwell, R.M. and Santi, P.M. (2017), "Assessing the timing and magnitude of precipitation-induced seepage into tunnels bored through fractured rock", Tunnel. Underg. Space Technol., 65, 62-75. https://doi.org/10.1016/j.tust.2017.02.003.
  36. Vaziri, M.R., Tavakoli, H. and Bahaaddini, M. (2022), "2D numerical study of the mechanical behaviour of non-persistent jointed rock masses under uniaxial and biaxial compression tests", Geomech. Eng., 28(2), 117-133. https://doi.org/10.12989/gae.2022.28.2.117.
  37. Wan, D., Hu, C. and Xing, W. (2018), "Application of discrete fracture network model to mine water inflow prediction", J. Hebei GEO Univ., 41(01), 65-69.
  38. Wan, L., Wang, J., Zeng, Q., Ma, D., Yu, X. and Meng, Z. (2022), "Vibration response analysis of the tail beam of hydraulic support impacted by coal gangue particles with different shapes", ACS omega, 7(4), 3656-3670., https://doi.org/10.1021/acsomega.1c06279.
  39. Wang, E.Z., Sun, Y., Huang, Y.Z. and Wang, H.M. (2002), "3-D seepage flow model for discrete fracture network and verification experiment", J. Hydraul. Eng., 5, 37-40.
  40. Wang, G. (2006), "Threedimensional simulation of rock joints and permeability tensor analysis", Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan.
  41. Wei, X. and Yang, C.H. (2015), "A method of geometric parameter determination of drilling rock fractures", Chin. J. Rock Mech. Eng., 34(9), 1758-1766.
  42. Xiao-wei, J., Li, W.A.N., Xu-sheng, W.A.N.G., Xiong, W. and Hui-hong, C. (2009), "Estimation of depth-dependent hydraulic conductivity and deformation modulus using RQD", Rock Soil Mech., 30(10), 3163-3167.
  43. Xue, Y.C., Sun, W.B. and Wu, Q.S. (2020), "The influence of magmatic rock thickness on fracture and instability law of mining surrounding rock", Geomech. Eng., 20(6), 547-556. https://doi.org/10.12989/gae.2020.20.6.547.
  44. Yamada, Y., Yoshimura, N. and Sakurai, T. (1968), "Plastic stress-strain matrix and its application for the solution of elastic-plastic problems by finite element method", Int. J. Mech. Sci., 10, 343-354. https://doi.org/10.1016/0020-7403(68)90001-5.
  45. Yang, Y., Han, B., Xie, K. et al. (1995), "To Forecast the water yield of coal mine applying the mine series interrelated model with multivariation", Coal Geol. Explor., 23(6), 38-42.
  46. Yanqing, W. (1998), "Determination methods of hydraulic parameters of rock mass (7)", Hydrogeol. Eng. Geol., 25(2), 42-48.
  47. Yin, D., Wang, W. and Chen, S. (2011), "Block element method for seepage-stress coupling in random fractured rock", Rock Soil Mech., 32(09), 2861-2866.
  48. Zeng, Y., Lian, H., Du, X., Tan, X. and Liu, D. (2022), "An analog model study on water-sand mixture inrush mechanisms during the mining of shallow coal seams", Mine Water Environ., 1-9.
  49. Zeng, Y., Pang, Z., Wu, Q., Hua, Z., Lv, Y., Wang, L., ... & Liu, S. (2022), "Study of water-controlled and environmentally friendly coal mining models in an ecologically fragile area of Northwest China", Mine Water Environ., 1-15. https://doi.org/10.1007/s10230-022-00871-w.
  50. Zhang, J., Sheng, J., Huang, T. et al. (2020), "Research on permeability and connectivity of 2D fracture network", Indus. Miner. Proc., 49(07), 6-10.
  51. Zhang, Y.H., Zhou, H.W. and Xie, H.P. (2005), "Improved cubic covering method for fractal dimensions of a fracture surface of rock", Chin. J. Rock Mech. Eng., 24(17), 3192-3196.
  52. Zhao, J., Chen, J., Zhang, X., Jiang, N. and Zhang, Y. (2020a), "Distribution characteristics of floor pore water pressure based on similarity simulation experiments", Bull. Eng. Geol. Environ., 79(9), 4805-4816. https://doi.org/10.1007/s10064-020-01835-6
  53. Zhao, J., Juntao, C., Huilin, X., Zhao, Z. and Xinguo, Z. (2022), "Dynamic mechanical response and movement evolution characteristics of fault systems in the coal mining process", Pure Appl. Geophys., 179, 233-246. https://doi.org/10.1007/s00024-021-02905-w.
  54. Zhao, J., Zhang, X., Ning, J., Yin, L. and Guo, W. (2020b), "Porosity characteristics of fault floor under fluid-solid coupling", Bull. Eng. Geol. Environ., 79(5), 2529-2541. https://doi.org/10.1007/s10064-019-01701-0.
  55. Zhao, J.H., Yin, L.M. and Guo, W.J. (2018), "Stress-seepage coupling of cataclastic rock masses based on digital image technologies", Rock Mech. Rock Eng., 51(8), 2355-2372. https://doi.org/10.1007/s00603-018-1474-5.
  56. Zhou, C., Ye, Z., He, J. et al. (1998), "Probability models and stochastic simulation of rock joints opening", Chin. J. Rock Mech. Eng., 17(3), 267-272.
  57. Zhou, F., Sun, W.B., Shao, J.L., Kong, L.J. and Geng, X.Y. (2020), "Experimental study on nano silica modified cement base grouting reinforcement materials", Geomech. Eng., 20(1), 67-73. https://doi.org/10.12989/gae.2020.20.1.067.
  58. Zhou, Z. and Wang, J. (2004), Fissure Medium Hydrodynamics. Water and Power Press, Beijing.
  59. Zhou, Z., Cai, X., Li, X., Cao, W. and Du, X. (2020), "Dynamic response and energy evolution of sandstone under coupled static-dynamic compression: insights from experimental study into deep rock engineering applications", Rock Mech. Rock Eng., 53, 1305-1331. https://doi.org/10.1007/s00603-019-01980-9.