Journal of Industrial Technology (산업기술연구)

Kangwon National University, Institute of Industrial Technology (강원대학교 산업기술연구소)
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A study of seismic velocity and amplitude variation around underground cavity

지하 공동에 대한 탄성파 속도 및 진폭 변화에 관한 연구

  • 이상철 (강원대학교 대학원 지구시스템공학과) ;
  • 오석훈 (강원대학교 지구시스템공학과) ;
  • 손권익 (강원대학교 산업공학과) ;
  • 서백수 (강원대학교 지구시스템공학과)
  • Published : 2007.02.28
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Abstract

This study was designated to clarify the aspect of the wave propagation around the cavity. The change of traveltime and amplitude of the seismic wave was observed according to the various wave velocities of the cavity. The seismic wave detour or penetrate the cavity depending on the seismic velocity of the in-filled material. Generally, seismic wave detours toward high velocity zone around the cavity, and when the velocity of the cavity material reaches to 80 % of the base rock, the wave penetrates the cavity. The traveltime of the detouring seismic wave is not sensitive to the change of the cavity velocity, but as the velocity of the cavity increases, the fall of the amplitude was reduced. The penetrating wave showed the steeply increasing amplitude due to the reiteration of the detouring wave.

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