Furthermore, due to their mechanism complexities, such as nonlinearity, elastic-plastic property, volume dilatancy, and anisotropism
, the gravelly soil is difficult to be studied in-depth from the perspective of continuum mechanics.
High-rank coal reservoir is characterized by high degree of metamorphism, strong anisotropism
, matrix density, high adsorption capacity of coalbed, and poor permeability ; these characteristics result in the low gas extraction efficiency of CBM in high-rank coal reservoirs.
Hole FD (1961) A classification of pedoturbations and some other processes and factors of soil formation in relation to isotropism and anisotropism
. Soil Science 91, 375-377.
The slight decline in the CH compounds curve may result from the anisotropism
of oil shale samples.
It can be used to simulate the anisotropism
, anisotropic and discontinuity characters of the medium, and the complex boundary condition in engineering.
of the Non-smooth surface of butterfly wing.
Optical data: In reflected light: white, moderate anisotropism
, nonpleochroic; rare red internal reflections in oil.
Especially in the km-depth mining stage in East China, geological environment gets changeable and complicated, anisotropism
of surrounding rock structures on working face is quite apparent, and stress distribution in rock stratum is extremely irregular .
Optical data: In reflected light: greyish white, anisotropism
moderate in air and strong in oil, bireflectance perceptible in air and moderate in oil, pleochroism weak in air white with bluish tints and enhanced in oil.
A classification of perturbations and some other processes and factors of soil formation in relation to isotropism and anisotropism
. Soil Science 9, 375-7.
Based on the above experiment, the speed of downward movement of wetting front was obviously far greater than that of horizontal movement, which indicates that the property of permeation has typical anisotropism
. The inequivalence of infiltration characteristic in both directions will be discussed as follows.
Optical data: In reflected light: creamy, distinct anisotropism
from light to dark creamy, no bireflectance, pleochroism not given, [R.sub.1], [R.sub.2]: (47.0, 37.6 %) 480 nm, (48.2, 39.2 %) 540 nm, (49.6, 40.7 %) 580 nm, (52.3, 44.3 %) 660 nm.