• Title, Summary, Keyword: 브이-컷

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A study on analysis of vibration and crack measurement data on granite-bed rock (화강암 지반에서 진동 및 크랙측정치 분석에 관한 연구)

  • Han, Dong-Hun;Ahn, Myung-Seog;Lee, Kwang-Yeol;Oh, Byung-Sam;Kang, Moon-Gu
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.5 no.3
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    • pp.251-260
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    • 2003
  • Tunnel blasting has been performed with V-cut to investigate the characteristics. Blasting vibrations were measured at two directions, the proceed direction and side direction. Propagation characteristics were determined by regression analysis; square root scaled distance and cube root scaled distance with maximum charge per delay of the blast. Testing result, The cross point was 62m in the allowable vibration velocity of 3mm/sec and 46m in 5mm/sec. Also, vibration level with measuring point was highest and decayed fastest, adapting to cube root scaled distance, for the proceed direction on ground.

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