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Determination of ejection velocity of rock fragments during rock burst in consideration of damage

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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.

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Authors and Affiliations

  1. School of Resources and Safety Engineering, Central South University, 410083, Changsha, China

    Zuo Yu-jun (Doctoral candidate), Li Xi-bing & Zhou Zi-long

Authors
  1. Zuo Yu-jun
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  2. Li Xi-bing
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  3. Zhou Zi-long
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Correspondence to Zuo Yu-jun.

Additional information

Foundation item: Projects(10472134, 50490274, 50490272) supported by the National Natural Science Foundation of China

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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

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  • DOI: https://doi.org/10.1007/s11771-005-0133-7

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