산업기술연구 (Journal of Industrial Technology)
- 제27권A호
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- Pages.9-14
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- 2007
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- 1229-9588(pISSN)
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- 1598-1371(eISSN)
지하 공동에 대한 탄성파 속도 및 진폭 변화에 관한 연구
A study of seismic velocity and amplitude variation around underground cavity
- 발행 : 2007.02.28
초록
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.