ABSTRACT

ABSTRACT: Physical model melanges made up of stronger stiffer blocks in a weaker softer matrix were created to study the effect block proportion and orientation have on melange mass strength and deformation properties. Test results indicate that increasing the block proportion generally results in a decrease in cohesion, an increase in angle of internal friction and an increase in modulus of deformation. The highest block proportion specimens have a cohesion as low as half of that of the matrix and an angle of internal friction as much as 16.5° higher than that of the matrix. Block orientation also affects the strength, most notably the cohesion, and the modulus of deformation. The specimens with the most adversely oriented blocks (30°) have the lowest cohesion, and the increase in modulus with block proportion is most pronounced for the models with vertically (0°)oriented blocks and least pronounced for those with horizontally (90°) oriented blocks.

Keywords:
orientation, axial loading direction, Reservoir Characterization, strength, Deformation property, volumetric block proportion, proportion specimen, model melange, anisotropic rock, block proportion specimen
Subjects:
Reservoir Characterization, Formation Evaluation & Management, Core analysis
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1994. A.A. Balkema - Permission to Distribute - American Rock Mechanics Association
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