MARVIN MANDEL, Governor

973

RULE 5 - CARDOX MAY NOT BE SHOT OFF THE
SOLID, OVER HEAVY POCK BINDERS OR
SHALE, OR IN A "TIGHT" SHOT.

RULE 6 - ANY CARDOX MISFIRE CAUSED BY THE
FAILURE OF THE DISK TO RUPTURE MAY
NOT BE APPROACHED UNTIL AFTER A
WAITING PERIOD OF AT LEAST 15 MINUTES
A MINE FOREMAN OR HIS DESIGNEE
SHALL SUPERVISE THE HANDLING OF THE
MISFIRE. THE MISFIRED SHELL SHALL BE
BLED OFF BEFORE REMOVAL FROM THE
HOLE, AND MARKED CONSPICUOUSLY ON
REMOVAL FROM THE HOLE.

REVISOR'S NOTE: This subsection presently appears
as Article 66C, section 628 (a) and (b) of
the Code. The only changes made are in
style.

(P) AIRDOX.—WHERE AIRDOX IS USED FOR BLASTING
OR BREAKING DOWN THE COAL, THE FOLLOWING RULES APPLY:

RULE 1 - COMPRESSED AIR SHALL BE CONDUCTED
FROM THE COMPRESSOR TO WITHIN A
PRACTICAL WORKING DISTANCE OF THE
FACE BY A STEEL AIR LINE TESTED TO
WITHSTAND AN APPROXIMATE PRESSURE OF
20,000 POUNDS PER SQUARE INCH.

RULE 2 - AIR LINES SHALL BE GROUNDED AT THE
COMPRESSOR AND, IF POSSIBLE, AT OTHER
LOW-RESISTANCE GROUND CONNECTIONS
ALONG THE LINES, SUCH AS AT BORE-HOLE
CASINGS. THEY MAY NOT BE CONNECTED
IN ANY WAY TO ANY TRACK, WATER LINE,
OR OTHER ELECTRIC POWER RETURN
CONDUCTOR. THEY SHALL BE SUITABLY
INSULATED WHERE THEY CROSS ELECTRIC
WIRE OR UNDERNEATH THE TRACK.

RULE 3 - UNIONS SHALL BE INSTALLED IN EACH
STEEL AIR LINE AT NOT MORE THAN 1,000
FOOT INTERVALS.

RULE 4 - A SHUTOFF VALVE SHALL BE INSTALLED
EVERY 1,000 FEET IN ALL AIRDOX LINES
AND BRANCH LINES AT A POINT NEAR THE
MAIN LINES.

RULE 5 — AIRDOX LINES SHALL BE PROTECTED AT