Geomechanics and Engineering

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Numerical simulation of pressure relief in hard coal seam by water jet cutting

  • Song, Dazhao (School of Safety Engineering, China University of Mining and Technology) ;
  • Wang, Enyuan (School of Safety Engineering, China University of Mining and Technology) ;
  • Xu, Jiankun (School of Mines, China University of Mining and Technology) ;
  • Liu, Xiaofei (School of Safety Engineering, China University of Mining and Technology) ;
  • Shen, Rongxi (Shaanxi Coal and Chemical Technology Institute Co., Ltd.) ;
  • Xu, Wenquan (Shaanxi Coal and Chemical Technology Institute Co., Ltd.)
  • Received : 2014.05.04
  • Accepted : 2014.12.21
  • Published : 2015.04.25
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Abstract

The applications of water jet cutting (WJC) in coal mine have progressed slowly. In this paper, we analyzed the possibility and reasonableness of WJC application to pressure relief in hard coal seam, simulated the distributive characteristics of stress and energy fields suffered by hard coal roadway wallrock and the internal relationships of the fields to the instability due to WJC (including horizontal radial slot and vertical annular slot) on roadway wallrock. The results showed that: (1) WJC can unload hard coal seam effectively by inducing stress release and energy dissipation in coal mass near its slots; its annular slots also can block or weaken stress and energy transfer in coal mass; (2) the two slots may cause "the beam structure" and "the small pillar skeleton", and "the layered energy reservoir structure", respectively, which lead to the increase in stress concentration and energy accumulation in coal element mass near the slots; (3) the reasonable design and optimization of slots' positions and their combination not only can significantly reduce the scope of stress concentration and energy accumulation, but also destroy coal mass structure on a larger scale to force stress to transfer deeper coal mass.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

References

  1. Ashok, J. and Shrivastva, B.K. (2009), "Numerical simulation of coal pillar strength", Int. J.Rock Mech. Mining Sci., 46(4), 779-788. https://doi.org/10.1016/j.ijrmms.2008.11.003
  2. Chang, Z. (2006), "The Theory of Non-Isotropic Breaking Rock by Water Jets and Its Application", Ph.D. Dissertation; Taiyuan University of Technology, Taiyuan, China.
  3. Cress, G., Brady, B. and Rowell, G. (1987), "Sources of electromagnetic radiation from fracture of rock samples in laboratory", Geophy. Res. Lett., 14(4), 331-334. https://doi.org/10.1029/GL014i004p00331
  4. Daniel, L.M. (1976), "Experimental studies of water jet impact on rock and rocklike materials", Proceedings of the 3rd International Symposium on Jet Cutting Technology, Chicago, IL, USA, May, pp. 27-46.
  5. Driad-Lebeau, L., Lahaie, F., Al Heib, M., Josien, J.P., Bigarre, P. and Noirel, J.F. (2005), "Seismic and geotechnical investigations following a rock burst in a complex French mining district", Int. J. Coal Geol. 64(1-2), 66-78. https://doi.org/10.1016/j.coal.2005.03.017
  6. Dyskin, A.V. and Germanovich, L.N. (1993), "Model of rock burst caused by cracks growing near free surface", Proceedings of the 3rd International Symposium on Rock Bursts and Seismicity in Mines, Rotterdam, Netherlands, August, pp. 169-174.
  7. Farmer, L.W. and Attewell, P.B. (1965), "Rock penetration by high velocity water jets", Int. J. Rock Mech. Mining Sci., 2(2), 135-153. https://doi.org/10.1016/0148-9062(65)90010-0
  8. Fenn, O. (1989), "The use of water jets to assist free-rolling cutters in the excavation of hard rock", Tunn. Undergr. Space Tech., 4(3), 409-417. https://doi.org/10.1016/0886-7798(89)90085-0
  9. Frid, V. and Vozoff, K. (2005), "Electromagnetic radiation induced by mining rock failure", Int. J. Coal Geol., 64(1-2), 57-65. https://doi.org/10.1016/j.coal.2005.03.005
  10. Hajiabdolmajid, V. and Kaiser, P. (2003), "Brittleness of rock and stability assessment in hard rock tunneling", Tunn. Undergr. Space Tech., 18(1), 35-48. https://doi.org/10.1016/S0886-7798(02)00100-1
  11. Kang, Y., Wang, X., Yang, X. and Yuan, B. (2012), "Numerical simulation of control blasting with borehole protecting and water jet slotting in soft rock mass", Dis. Adv., 5(4), 933-938.
  12. Li, Z., Pan, Y., Zhang, X. and Yin, L. (2009), "Mechanism of releasing pressure by high-pressure water jet applied to cutting coal seam", J. Liaoning Technical University, 28(1), 43-45.
  13. Lin, B., Meng, F. and Zhang, H. (2011), "Regional gas control based on drilling-slotting-extracting integration technology", J. Chi. Coal Soc., 36(1), 75-79.
  14. Liu, L. (2007), "Water cutting and crossed-bores drifting to controlling coal and gas outburst", Coal Mining Tech., 12(3), 83-86.
  15. Lu, T., Zhao, Z. and Hu, H. (2011), "Improving the gate road development rate and reducing outburst occurrences using the water jet technique in high gas content outburst-prone soft coal seam", Int. J. Rock Mech. Mining Sci., 48(8), 1271-1282. https://doi.org/10.1016/j.ijrmms.2011.09.003
  16. Martinez-Martinez, J., Benavente, D., Ordonez, S. and Garcia-del-Cura, M.A. (2008), "Multivariate statistical techniques for evaluating the effects of brecciated rock fabric on ultrasonic wave propagation", Int. J. Rock Mech. Mining Sci., 45(4), 609-620. https://doi.org/10.1016/j.ijrmms.2007.07.021
  17. Momber, A.W. and Kovacevic, R. (1997), "Test parameter analysis in abrasive water jet cutting of rocklike materials", Int. J. Rock Mech. Mining Sci., 34(1), 17-25. https://doi.org/10.1016/S1365-1609(97)80030-5
  18. Nie, B., He, X., Wang, E., Li, G. and Liu, W. (2007), "Coupled stress-electricity model and its parameters computation method of coal or rock", J. China University Mining Tech., 36(4), 505-509.
  19. Nie, B.S., Meng, Y.Q. and Wang, X.J. (2008), "Abrasive water jet cutting technology on coal mine safety and its applications", Proceedings of International Symposium on Safety Science and Technology, Shenyang, China, October, pp. 177-181.
  20. Ogawa, T., Oike, K. and Miura, T. (1985), "Electromagnetic radiations from rocks", J. Geophy. Res., 90(D4), 6245-6249. https://doi.org/10.1029/JD090iD04p06245
  21. Orlecka-Sikora, B., Lasocki, S., Lizurek, G. and Rudzinski, L. (2012), "Response of seismic activity in mines to the stress changes due to mining induced strong seismic events", Int. J. Rock Mech. Mining Sci., 53, 151-158. https://doi.org/10.1016/j.ijrmms.2012.05.010
  22. Ortlepp, W.D. and Stacey, T.R. (1994), "Rock burst mechanisms in tunnels and shafts", Tunn. Undergr. Space Tech., 9(1), 59-65. https://doi.org/10.1016/0886-7798(94)90010-8
  23. Qian, M. and Shi, P. (2003), Ground Pressure and Strata Control, China University of Mining and Technology Press, Xuzhou, China.
  24. Vjay, M.M., Grattan, P.E. and Brierly, W.H. (1984), "An experimental investigation of drilling and deep slotting of hard rocks with rotating high pressure water jets", Proceedings of the 7th International Symposium on Jet Cutting Technology, Ottawa, Canada, June, pp. 419-438.
  25. Wang, J. and Chen, Y. (2006), The Application of ABAQUS in Civil Engineering, Zhejiang University Press, Hangzhou, China.
  26. Wang, E., He, X., Li, Z. and Zhao, E. (2009), Electromagnetic Radiation Technology and Application of Coal or Rock, Science Press, Beijing, China.
  27. Wattimena, R.K., Kramadibrata, S., Sidi, I.D. and Azizi, M.A. (2013), "Developing coal pillar stability chart using logistic regression", Int. J. Rock Mech. Mining Sci., 58, 55-60. https://doi.org/10.1016/j.ijrmms.2012.09.004
  28. Wu, H. (2009), The Theory and Technology Study on Pressure Relief and Permeability Enhancements of the Coal Seam with High Concentration of Gas and Low Permeability, Ph.D. Dissertation; China University of Mining and Technology, Xuzhou, China.
  29. Xie, H. (1998), Damage Mechanics of Rocks and Concrete, China University of Mining and Technology Press, Xuzhou, China.
  30. Yang, L. and Gao, B. (2010), Engineering Mechanics, Huazhong University of Science and Technology Press, Wuhan, China.
  31. Zhao, Y., Feng, Z. and Wan, Z. (2003), "Least energy principle of dynamical failure of rock mass", China J. Rock Mech. Eng., 22(11), 781-1783.
  32. Zhang, K. (2011), "Determining the reasonable width of chain pillar of deep coal seams roadway driving along next goaf", J. Chi. Coal Soc., 36(supp1), 28-35.
  33. Zhang, X. and Miao, X. (2002), "Numerical simulation on layer-crack and failure of laminated rock masses", Chi. J. Rock Mech. Eng., 21(11), 1645-1650.
  34. Zembaty, Z. (2004), "Rock burst induced ground motion - A comparative study", Soil Dyn. Earthq. Eng. 24(1), 11-23. https://doi.org/10.1016/j.soildyn.2003.10.001
  35. Zuo, Y., Li, X. and Zhang, G. (2005), "A catastrophe model for underground chamber rock burst under lamination spallation bucking", J. Central South University, 36(2), 1589-1596.
  36. Zweben, C. and Rosen, B.W. (1970). "A statistical theory of material strength with application to composite materials", J. Mech. Phys. Solids, 18(3), 189-206. https://doi.org/10.1016/0022-5096(70)90023-2

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