In charging holes for blasting in coal, slate or rock in any mine, a tight cartridge shall not be rammed into the hole by any means. Only nonmetallic tamping bars shall be used for charging and tamping blast holes.
52 P.S. § 70-240
In charging holes for blasting in coal, slate or rock in any mine, a tight cartridge shall not be rammed into the hole by any means. Only nonmetallic tamping bars shall be used for charging and tamping blast holes.
52 P.S. § 70-240