根据土的弹性模量和泊松比满足双曲线关系，给出了弹性模量和泊松比折减的基本原理。
The reduction theory for elastic modulus and Poisson's ratio is given according to the stress-strain hyperbolic curve of the soil.
E关系曲线的库群整体稳定性和破坏的关键判据，其中，K为强度折减系数，?。
The global stability criterion of cavern group is established based on the K-?E relation, where K is the strength reduction factor and ?
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