HARRY HUGHES, Governor

1365

(2)  Temporary safety posts, jacks, or crossbars
shall be set close to the face if necessary, before any
other mining operation is begun, and as needed thereafter.

(3)  Any underground working place shall be
timbered sufficiently to protect workers working at the face
from falls of roof, ribs, or face. Loose top and
overhanging or loose faces and ribs either shall be timbered
adequately or taken down.

(4)  Timber removed by cutting machine, loading
machine operators, or knocked out by blasting shall be
replaced promptly, unless unnecessary for adequate roof
support or protection.

(c) (1) The mine foreman, assistant mine foreman and
mine inspectors shall ascertain if workmen understand roof,
rib, and face testing. Uninformed workers and new employees
shall be instructed properly in correct methods of testing.

(2)  Unless this testing is performed
specifically and satisfactorily by other personnel, face
workers, and other employees exposed to hazards from falls
of rock and coal initially shall examine and test frequently
thereafter the roof, ribs, and face before starting work or
before starting a machine. If a dangerous condition is
found, it shall be corrected immediately by taking down
loose material or by proper and adequate timbering before
work is continued or other work is done.

(3)  During work on any shift, the mine foreman
in charge of the shift or his designated assistant shall
examine, or cause to be examined by a competent person,
roof, ribs, and face of working places and passageways where
men travel, for any dangerous condition. Where a dangerous
condition is found, it shall be corrected promptly by
removing loose roof or rib, by adequate timbering, or by
duplication of defective timbering where necessary. The
timbering shall conform to the clearance provisions
provided.

(4)  If there is danger of coal rolling on a
person during or after undercutting or center cutting, the
undercutting or center cutting shall be spragged by placing
blocks in the cut or by blocking with leaning posts.

(d) In worked out places where timbers are being
removed, any person engaged in drawing timber may not work
alone.]

[7-409.

Any abandoned mine or portion of a mine, and any
abandoned opening and sinkhole to the surface shall be
fenced off securely at each entrance.]

[7-410.