Liu Zhuhua, Yao Baokui, Yang Jialu. 1997: FRACTURE MECHANISM OF THE DISCAL DRILL CORE. JOURNAL OF ENGINEERING GEOLOGY, 5(4): 330-334.
    Citation: Liu Zhuhua, Yao Baokui, Yang Jialu. 1997: FRACTURE MECHANISM OF THE DISCAL DRILL CORE. JOURNAL OF ENGINEERING GEOLOGY, 5(4): 330-334.

    FRACTURE MECHANISM OF THE DISCAL DRILL CORE

    • In this paper the discal fracture phenomena of some drill cores in China are described, some principal fracture characteristics of the discal core are summarized. After that an analysis of the fracture mechanism is made for discal fraclure of the rock core. The results show that the fracture spread of rock dics originates from the peripheral microfissure on the core surface. Then,according to the size of the microfissure in rock and the morphologic characteristics of rock discs at Ertan dam site, the maximum principal stress of the ground stress field on Ertan dam site is evaluated quantitatively(the value and the direction of the maxuimum principal stress or the tectonic stress).
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