Liquifaction of fluid saturated rocks due to explosion-induced stress waves

Conference · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.1201/9781003078944-133· OSTI ID:7024405

Dey, T N; Brown, J A

Shock-induced liquefaction of a water-saturated rock may occur during the passage of a large amplitude stress wave, such as that due to an explosive. We studied this phenomena numerically with the aid of a material model which incorporates effective stress principles, and experimentally with a gas gun. Our numerical model is capable of calculating material response for both small and large deformation and any initial saturation. Phase transitions of the solid phase and the water phase are also allowed. Fitting the model to dry gas gun experiments allowed reasonable predictions of nearly saturated experiments. Liquefaction, the loss of shear strength when pore pressure exceeds the mean stress, appears to occur during the unloading portion of these experiments. The pore crushing which occurs, even under fully saturated conditions, leads to greater attenuation of a stress wave, as well as liquefaction of the rock and a lengthening of the wave duration, as the wave passes. 12 refs., 4 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7024405
• Report Number(s): LA-UR-90-99; CONF-900646--7; ON: DE90006481
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
BLAST EFFECTS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MINIMIZATION
POROSITY
ROCKS
SATURATION
SEISMIC S WAVES
SEISMIC WAVES
SHEAR PROPERTIES
WATER SATURATION