›› 2009, Vol. 30 ›› Issue (2): 483-486.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of in-situ measurement results of tunnel’s stress field induced by linear charge explosion

FU Hong-xian   

  1. Research Center of Tunneling and Underground Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2007-04-19 Online:2009-02-10 Published:2011-01-27

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Abstract:

Based on stress and vibration fields resulted from linear charge explosion, according to charge characterizatic used in tunnel blasting, blastholes in tunnel face are considered as linear charges blasted in millisecond blasting methods, shape of stress and vibration fields in radial of blasting zone is shape of pillar; and shape of stress and vibration fields in axis of tunnel is combination of several hemicycles. The intensity of stress field is not very well-proportioned; intensity of stress field in in radial of blasting zone is maximal; intensity of stress field from radial to axial is gradually diminishing; intensity of stress in the port of blasting zone is evidently diminishing; intensity of stress in axis in the port of blasting zone is minimal.

Key words: linear charge, stress wave, tunnel blasting

CLC Number: 

  • TD 235.39
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