Juncai Xu, Xin Xie*, Chenye Yang and Zhenzhong Shen
Hydraulic fracture can often cause serious disasters, of which the hydraulic fracturing of a single crack is one of the common styles. In the paper, the damage mechanics of the hydraulic fracture are revealed by the hydraulic fracture experiment of the single crack. Mortar is used as a similar material to rock mass, and the hydraulic fracture characteristics experiment was carried out. The hydraulic pressure Pini and the change in water pressure inside the crack were studied. The critical water pressure Pc and the failure mode of the specimen were analyzed under different working conditions. Based on the experiment, the expression for the correction coefficient of the crack width λ and the failure of the critical water pressure Pc were obtained.
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