首先分析在温度降低过程中岩石物理力学参数随温度变化对裂隙扩展的影响；

To explore the influence mechanism of temperature decreasing on crack propagation, firstly the effect of rock parameters change caused temperature decreasing on the crack propagation is analyzed.

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介绍了一种分析岩石物理力学参数间内在关联程度的新方法—灰色关联分析法。

This paper presents a new gray correlative analysis method on internal correlation degree of rock physical and mechanic parameters.

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而且，岩石物理力学性质的影响与断裂力学性质、边界条件等的影响是互相联系的。

Meanwhile, the effect of physical and mechanical properties of rocks co-exists with that caused by the change of mechanical properties of fractures and boundary conditions.

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