查看文章

To increase the understanding of strength and failure mechanism of fractured rock, a series of uniaxial compression tests on red sandstone specimens containing two pre-existing oval flaws was carried out using a rock mechanics servo-controlled testing system. On the basis of the experimental results, the influences of the coplanar flaw angle and ligament angle on the mechanical parameters and fracture process of sandstone specimens containing two oval flaws were analyzed in detail. The mechanical parameters including peak strength, peak strain and elastic modulus of pre-flawed specimens are all much lower than those of the intact specimens. For the specimens containing two coplanar oval flaws, the peak strength is distinctly related to the coplanar flaw angle, while the peak strain and elastic modulus are not obviously dependent on the coplanar flaw angle. For the specimens containing two non-coplanar …