Analytical methods for wave propagation across jointed rock masses

2013 ◽  
pp. 111-123
Author(s):  
J Li ◽  
H Li ◽  
X Zhao
Keyword(s):  
Wave Propagation ◽  
Analytical Methods ◽  
Jointed Rock ◽  
Rock Masses ◽  
Jointed Rock Masses

Numerical Homogenization of Jointed Rock Masses Using Wave Propagation Simulation

2013 ◽  
Vol 47 (4) ◽  
pp. 1393-1409
Author(s):  
Hatem Gasmi ◽  
Essaïeb Hamdi ◽  
Nejla Bouden Romdhane
Keyword(s):  
Wave Propagation ◽  
Jointed Rock ◽  
Numerical Homogenization ◽  
Rock Masses ◽  
Jointed Rock Masses

Long-wavelength P-wave and S-wave propagation in jointed rock masses

Geophysics ◽  
2009 ◽  
Vol 74 (5) ◽  
pp. E205-E214 ◽  
Author(s):  
Minsu Cha ◽  
Gye-Chun Cho ◽  
J. Carlos Santamarina
Keyword(s):  
Wave Propagation ◽  
Rock Mass ◽  
Normal Stress ◽  
Jointed Rock ◽  
P Wave ◽  
Rock Masses ◽  
S Wave ◽  
Jointed Rock Masses ◽  
Long Wavelength ◽  
Joint Properties

Field data suggest that stress level and joint condition affect shear-wave propagation in jointed rock masses. However, the study of long-wavelength propagation in a jointed rock mass is challenging in the laboratory, and limited data are available under controlled test conditions. Long-wavelength P-wave and S-wave propagation normal to joints, using an axially loaded jointed column device, reproduces a range of joint conditions. The effects of the normal stress, loading history, joint spacing, matched surface topography (i.e., joint roughness), joint cementation (e.g., after grouting), joint opening, and plasticity of the joint filling on the P-wave and S-wave velocities and on S-wave attenuation are notable. The ratio [Formula: see text] in jointed rock masses differs from that found in homogeneous continua. The concept of Poisson’s ratio as a function of [Formula: see text] is unwarranted, and [Formula: see text] can be interpreted in terms of jointed characteristics. Analytic models that consider stress-dependent stiffness and frictional loss in joints as well as stress-independent properties of intact rocks can model experimental observations properly and extract joint properties from rock-mass test data. Thus, joint properties and normal stress have a prevalent role in propagation velocity and attenuation in jointed rock masses.

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