Abstract
The ejection velocity of rock fragments during rock burst, one of the important indexes representing the rock burst strength, is used most conveniently in the supporting design of tunnel with rock burst tendency and is often determined by means of observation devices. In order to calculate the average ejection velocity of rock fragments theoretically, the energy of rock burst was divided into damage consuming energy and kinetic energy gained by unit volume of rock firstly, and then the rock burst kinetic proportional coefficient ν was brought up which could be determined according to the rock-burst damage energy index W D, at last the expression of the average ejection velocity of rock fragments during rock burst was obtained and one deep level underground tunnel was researched using the mentioned method. The results show that the calculation method is valid with or without considering the tectonic stress of tunnels, and that the method can be a reference for supporting design of deep mining.
Similar content being viewed by others
References
Linkov A M. Rock burst and instability of rock masses [J]. Int J Rock Mech Min Sci Geomech Abstr, 1996, 33(7): 727–732.
Cook N G W, Hoek E. Rock mechanics applied to the study of rock bursts[J]. J S Afr Inst Min Metall, 1996, 66(3): 435–528.
Ortlepp W D. Rock burst mechanisms in tunnels and shafts[J]. Tunnelling and Underground Space Technology, 1994, 59(6): 59–65.
Diering D H. Ultra-deep level mining, future requirements[J]. J S Afr Inst Min Metall, 1997, 97(6): 249–255.
Kirzhner F, Rosenhouse G. Numerical analysis of tunnel dynamic response to earth motions[J]. Tunnelling and Underground Space Technology, 2000, 15(3): 249–258.
LI Shu-lin. The experiment on rock burst tendency dynamic failure[J]. Journal of Liaoning Engineering and Technology University, 2001, 20(4): 436–438. (in Chinese)
XIE He-ping. The chance and challenge in the deep mining and underground structure [A]. The 175th Symposium in Xiangshan Science Conference[C]. Beijing: China Environment Science Press, 2001. (in Chinese)
GUO Ran, YU Run-cang. The support design for rock burst tendency tunnels[J]. Chinese Mining Engineering, 2002,11(3): 23–26. (in Chinese)
Yiagerov H B. The characteristics of rock burst and the prevention measures [J]. The Foreign Metal Mines, 1990(5): 23–27.
TANG Chun-an, XU Xiao-he. The problem of rock burst in deep mining[A]. The 175th Symposium in Xiangshan Science Conference[C]. Beijing: China Environment Science Press, 2001. (in Chinese)
HE Man-chao. The dynamic characteristics of wall rock in deep tunnels and the dynamic design theory [A]. The 175th Symposium in Xiangshan Science Conference[C]. Beijing: China Environment Science Press, 2001. (in Chinese)
Ortlepp W D. High Ground Displacement Velocities Associated with Rock Mines[M]. Rotteram: Balkema, 1993. 297–309.
LIU Xiao-ming, LI Zhuo-fen. The damage mechanics analysis and rock burst damage index for brittle rock [J]. Chinese Journal of Rock Mechanics and Engineering, 1997, 16(2): 140–147. (in Chinese)
Lemaitre J. An equivalent strain hypothesis [J]. Journal of Engineering Materials and Technology, 1985, 107(1): 83–89.
YANG Xiao-lin, WANG Shu-ren. Meso-mechanism of damage and fracture on rock blasting[J]. Explosion and Shock Waves, 2000, 20(3): 247–252. (in Chinese)
Henrych J. The Dynamics of Explosion and its Use [M]. Amsterdam: Elsevier Scientific Publishing Company, 1979.
XU Dong-jun. The research of the stress state in rock burst[J]. Chinese Journal of Rock Mechanics and Engineering, 2000,19(2): 169–172. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Projects(10472134, 50490274, 50490272) supported by the National Natural Science Foundation of China
Rights and permissions
About this article
Cite this article
Zuo, Yj., Li, Xb. & Zhou, Zl. Determination of ejection velocity of rock fragments during rock burst in consideration of damage. J Cent. South Univ. Technol. 12, 618–622 (2005). https://doi.org/10.1007/s11771-005-0133-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-005-0133-7