I want to make that protection stone would protect from being used chests, doors etc, I write like this but players still able to open my chests could someone help me out?

- title: Skryniu apsauga
  block: 82
  radius: 5
  enable-on-src: true
  mixing-group: 1
  price: 15000
  prevent-use: true
  no-conflict: true
  cuboid: true

You have to specify items in the prevent use.
The following example will prevent the use of chests, levers, wooden and iron doors and ender chests. Replace the bullet points with dashes followed by a space, then the item ID. (Github automatically replaces my dashes with bullet points)

prevent-use:

• 54
• 64
• 69
• 71
• 130

http://wiki.sacredlabyrinth.net/index.php/Field_Flag_Reference#prevent-use