According to study on coupled thermo-mechanical creep properties of bedded rock salt

it is shown that the deformation within bedded rock salt is out of line; it leads to multiple shearing destruction and becoming grid between the interlayer of bedded rock salt; meanwhile

the pores and fissures are increased; the gas permeability is augmented and it raised 5 orders of magnitude than not disturbance; so natural gas must leak when gas storage cavern under long-term running. The experimental study of gas permeability of bedded rock salt at rheodestruction shows that the relation between gas permeability and effective volume stress is . A mathematical model for long-term running permeability of gas storage cavern in bedded rock salt is established; and the numerical simulation for Jintan Gas Storage Cavern is carried out; the results are as follows: the fissures between the interlayer of bedded rock salt is main aisles of gas permeability; it has strong gas permeability; gas permeability within interlayer is delayed the fissure between interlayer; the speed of gas permeability is decreased with time; at last

it reaches stable state. So the salt-mudstone interlayer has a great impact on permeability of long-term running gas storage cavern of surrounding rock; reasonable running pressure is the important condition to the gas storage cavern without leaking. The results can offer some frame of reference to natural gas permeability research of long-term running storage cavern.