The effects of different angles of natural and artificial cracks on the permeability stress sensitivity of dense carbonate rocks and the effects of multiple cycles of pressurisation and depressurisation of artificial cracks on the permeability stress sensitivity of dense carbonate rocks were experimentally investigated.The study shows that with the increase of effective stress,the permeability of rock samples firstly decreases greatly and then decreases slightly until it tends to stabilise.The permeability stress sensitivity of all rock samples tends to decrease with the increase of fracture angle,and the permeability stress sensitivity of artificially fractured rock samples is stronger than that of natural fracture-developed rock samples as a whole.
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