›› 2010, Vol. 31 ›› Issue (11): 3487-3492.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A study of time-and spatial-attenuation of stress wave amplitude in rock mass

WANG Guan-shi 1, 2，LI Chang-hong2，HU Shi-li1，FENG Chun3，LI Shi-hai3   

  1. 1. School of Architectural and Surveying Engineering,Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China; 2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; 3. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2009-09-16 Online:2010-11-10 Published:2010-11-24

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Abstract:

The relation between wave frequency and vibration frequency in Kelvin-Voigt viscoelastic medium was studied by applying the plural theory. The time- and spatial- attenuation of wave amplitude was studied in rock and rock mass with a series of parallel interfaces. The study indicated that the attenuation of stress wave amplitude was mainly decided by vibration frequency of stress wave. Stress wave energy was influenced by interface in rock mass with a series of parallel interfaces. And the time- and spatial- attenuation of stress wave amplitude is decided by distance and reflection coefficient of interface. The decrease of distance of interfaces and the increase of reflection coefficient resulted in increase of spatial-attenuation of rock mass and decrease of time-attenuation, while increase of viscosity coefficient led to the increase of spatial-attenuation and almost the same time-attenuation. This study result played an important role in detecting rock mass structure.

Key words: viscoelastic medium, stress wave, attenuation coefficient, detecting of stress wave

CLC Number: 

  • TU 452
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