This paper analyses the physical sence of effective mass of energy band electron and also discusses its tensor.

本文分析了有效质量的物理意义，并对它的张量性质进行了讨论。

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Using the theory of damage mechanics and fracture mechanics, the damage tensor, effective stress tensor and damage strain, etc. of rock mass are defined, propagation equation of damage is developed.

运用损伤力学以及断裂力学理论，定义了岩体损伤张量、有效应力张量、损伤应变等，建立了损伤演化方程，从而建立了多裂隙岩体的损伤断裂模型。

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