| 内孔加压三轴条件下岩石的破裂试验研究 |
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| 引用本文： | 吴景浓,吴绵拔.内孔加压三轴条件下岩石的破裂试验研究[J].地震地质,1986,8(2):69. |
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| 作者姓名： | 吴景浓 吴绵拔 |
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| 作者单位： | 广东省地震局
(吴景浓)，中国科学院武汉岩土研究所(吴绵拔) |
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| 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
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| 关 键 词： | 破裂试验 花岗岩 内孔 大理岩 水压致裂 岩石抗拉强度 岩石破裂 应力状态 环向拉应力 三轴仪 |
EXPERIMENTAL RESEARCH OF ROCK FRACTURE UNDER PORE-TRIAXIAL STRESS CONDITION |
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| 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 |
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