Abstract: In this paper fracturing behavior of granite and marble as well as the effect of the stress path on the rock fracturing strength,is studied by use of the rock pore-triaxial apparatus.The test results show that:(1)strength of pore-pressure fractured rock increases with increase of confining,pressure;(2)under the tensile-compressive stress the rock shows the tensile fracture and the tensile stress which causes fracture in the rock decreases with increase of the axial pressure;(3)the values of rock tension strength from hydrofracturing are higher than those from other methods.

摘要： 本文应用岩石孔压三轴仪,研究花岗岩和大理岩的破裂特性,探讨应力途径对岩石破裂强度的影响。试验结果表明:(1)岩石的内孔水压致裂强度随围压的增加而线性增加,(2)在拉,压应力组合条件下,岩石呈现出拉破特性,引起岩石破裂的拉应力随着轴压增加而减少;(3)孔压致裂法获得的岩石抗拉强度值偏高。