Based on the experimental results of intact Brazilian disc of rock-like materials
a set of mecroscopic parameters in particle flow code (PFC) that can reflect the macroscopic mechanical behavior of rock-like materials under Brazilian test are obtained. Then PFC is used to simulate Brazilian test for holed-cracked Brazilian disc (HCBD) specimen. The effect of crack angle and radius ratio on the mechanical parameters of HCBD specimen is analyzed. Compared with intact specimen
the split load of HCBD specimen takes on a reducing tendency
and the reducing extent is closely related to pre-hole and crack parameters. The split load is non-linearly changed as crack angle increasing
but linearly decreases as the increase of radius ratio. In the range of simulation test
when the crack angle is smaller
the hole is the main reason resulting in the main crack initiation; while the crack angle is bigger
the reason of main crack initiation results from the pre-existing crack. When the crack angle is a constant and the radius is relatively smaller
the pre-existing crack is the main reason of main crack initiation; while the crack angle is bigger
the main crack initiation results from the pre-existing hole. Finally
the crack propagation mechanism of HCBD specimen is discussed.