Roof, Face, and Rib Control
45.2-709Roof, face, and ribs to be secure45.2-710Roof control plans45.2-711Instruction of miners45.2-712Copies of plan45.2-713Automated temporary roof support systems45.2-714Supplies of materials for supports45.2-715Examination and testing of roof, face, and ribs45.2-716Mapping of roof falls45.2-717Unsafe conditions45.2-718Removal of supports