内孔加压三轴条件下岩石的破裂试验研究

地震地质 ›› 1986, Vol. 8 ›› Issue (2): 69-76.

内孔加压三轴条件下岩石的破裂试验研究

吴景浓¹, 吴绵拔²

1. 广东省地震局;
2. 中国科学院武汉岩土研究所

收稿日期:1984-08-31 出版日期:1986-06-04 发布日期:2009-11-25

EXPERIMENTAL RESEARCH OF ROCK FRACTURE UNDER PORE-TRIAXIAL STRESS CONDITION

Wu Jingnang¹, Wu Mianba²

1. Seismologicat Bureau of Guangdong Province;
2. The Rock and Soil Mechanics Institute Academia Sinica

Received:1984-08-31 Online:1986-06-04 Published:2009-11-25

摘要/Abstract

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。

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.

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): 69-76.

Wu Jingnang, Wu Mianba. EXPERIMENTAL RESEARCH OF ROCK FRACTURE UNDER PORE-TRIAXIAL STRESS CONDITION[J]. SEISMOLOGY AND GEOLOGY, 1986, 8(2): 69-76.