Experimental investigation on fracture coalescence behavior of red sandstone containing two unparallel fissures under uniaxial compression

- Red sandstone containing two unparallel fissures (new fissure geometry) was machined.
- Analyze the effect of fissure angle α2 on mechanical parameters of red sandstone.
- Characterize cracking mode and charactertics of red sandstone by photographic monitoring.
- Construct the relation between the stress-time curve and crack coalescence process, AEs.