Pennsylvania Statutes Title 52 P.S. Mines and Mining § 690-241. Roof support

(a) General rule.--The roof in an underground area shall be supported as necessary for the protection of the employees and equipment. A roof control plan suitable to the roof conditions of each mine or part of a mine shall be adopted and complied with by the operator. The department shall be notified of the adoption of the plan of roof support, shall review the plan and:

(b) Roof support plans to be posted.--Workmen whose work involves roof support shall be informed of approved roof support plans and the plans shall be posted. Additional roof supports shall be used when and where necessary.

(c) Periodic revision and update of roof control plan.--Every mine operator shall revise and update the roof control plan every six months or more frequently if required to do so by the department. A copy of the plan shall be provided to the representative of the miners ten days prior to submitting it to the department for review and comment.