岩石孔底断裂控制机理研究

Fracture Control Mechanism at the Bottom of the Charged Holes in Rock

在保证垂直槽孔断裂成型并全面贯通的孔压下，对孔底水平截面Ｉ－ＩＩ型复合裂纹断裂机理及断裂与装药结构的关系等进行了分析， 建立了断裂判据， 初步确定了裂纹扩展的方向及预应力对断裂的贡献。其结果与工程实践相吻合。

Under the premise of grooved hole pressure which can completely split the section between the axes of vertical grooved holes,analysis about fracture mechanism of Ⅰ Ⅱ co crackle on level section at the bottom of the holes and relationship between fracture function and charged structure are carried out.At the same time,fracture criterion is established,crackle extending direction and its contributions to fracture function from preset tensile stress are determined quantitatively and tentatively.The results of which agree with the engineering practice.