With the deeper drilling operation increased gradually, the triaxial compressive strength model will become one of important parameters to measure the formation strength characteristics.

深井钻井作业量的逐步增加，岩石三轴抗压强度的预测模型将成为衡量地层强度特性的重要参数之一。

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Medium hard formation with high compressive strength. Such as hard shale, limestone, sandstone, dolomite, anhydrite and marble.

高抗压强度的中硬地层，如硬页岩。石灰岩。砂岩。白云岩。和硬石膏。大理石。

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Martensite formation is covered. The relationships between microstructure and strength, toughness, and ductility is presented in terms of the concepts developed throughout the course.

涵盖麻田散体相的形成。显微组织与强度、韧性及延性间的关系将以整个课程所学到的观念加以阐述。

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