Dear Majid, firstly, the bedding planes are not fractures, anyhow the fractures like joints and faults that connected with bedding planes can play a major role in enlargement and triggering the karstification, you can see my puplications about this subject on the researchgate

thanks a lot ....Your article was very useful

Please look at following link: https://www.researchgate.net/post/Do_fracture_systems_in_an_area_play_a_major_role_in_karstification?_tpcectx=profile_answers