If you use schematics, please read carefully as
OLD SCHEMATICS WILL NO LONGER WORK [+] PrisonMine Schematics will now take advantage of WorldEdit API, this will mean slabs, chests, torches, etc, etc, 100's of other blocks will now work correctly
[+]
If you are using schematics, you will need to copy the selection of blocks you wish to be in the schematic using WorldEdit (using //wand) and re enable the schematic option in the mine panel GUI