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936 LAWS OF MARYLAND [Ch.
(4) ACCUMULATION OF METHANE.—BLASTING MAY
NOT BE DONE AT ANY WORKING FACE OR OTHER PLACE WHERE
METHANE HAS ACCUMULATED AND IS LIKELY TO ATTAIN AM
EXPLOSIVE MIXTURE. THE WORKERS SHALL BE REMOVED FROM
EACH WORKING FACE OR PLACE UNTIL THE CONDITION HAS
BEEN CORRECTED.
(5) METHANE IN FACE REGION.—IF THE
METHANE CONTENT OF AIR IN ANY FACE OPERATION EXCEEDS
ONE PERCENT AT ANY POINT NOT LESS THAN 12 INCHES FROM
THE ROOF, FACE, OR RIB, AS DETERMINED BY A PERMISSIBLE
METHANE DETECTOR, A PERMISSIBLE FLAME SAFETY LAMP, OR
CHEMICAL ANALYSIS, THE WORKERS SHALL BE REMOVED FROM
THE AFFECTED AREA UNTIL THE CONDITION HAS BEEN
CORRECTED BY IMPROVING THE VENTILATION.
REVISOR'S NOTE: This subsection presently appears
as Article 66C, section 570 (a) through (e)
inclusive, of the Code. The only changes
made are in style.
(G) CROSSCUTS AND STOPPINGS.--
(1) GENERALLY.—CROSSCUTS BETWEEN ENTRIES
AND ROOMS SHALL BE MADE AT INTERVALS NOT EXCEEDING 105
FEET. HOWEVER, THIS REQUIREMENT DOES NOT APPLY TO
RECOVERY WORK IF THE WORKING FACE IS VENTILATED BY A
PERCEPTIBLE MOVEMENT OF AIR WHICH CONTAINS NOT LESS
THAN 19.5 PERCENT OXYGEN AND NOT MORE THAN 0.75
PERCENT CARBON DIOXIDE. CROSSCUTS BETWEEN ENTRIES
SHALL BE CLOSED, EXCEPT THE LAST ONE IN A PAIR OR SET
OF ENTRIES.
(2) CLOSING.—IF NECESSARY TO OBTAIN A
MOVEMENT OF AIR TO THE FACE OF A ROOM IN ORDER TO
CLEAR THE ROOM OF FLAMMABLE OR NOXIOUS GAS, CROSSCUTS
BETWEEN ROOMS SHALL BE CLOSED, EXCEPT THE ONE NEAREST
THE FACE.
(3) ABANDONED PLACES.—A CROSSCUT SHALL BE
PROVIDED AT OR NEAR THE FACE OF EACH ENTRY OR ROOM
BEFORE THE PLACE IS ABANDONED.
(4) ENTRIES BEYOND LAST
CROSSCUT.--ENTRIES, ROOMS, OR CHUTES MAY NOT BE TURNED
OFF AN ENTRY BEYOND THE LAST CROSSCUT. THIS DOES NOT
APPLY TO DRIVING PLACES TO MAKE A CONNECTION AT THE
FIRST CROSSCUT OR SIMILAR PASSAGEWAY USED AS A MAIN
AIRWAY IN CONNECTION WITH AN ENTRY. IT APPLIES TO
EXTENDING PLACES BEYOND THE AIRWAY BEFORE THE MAIN
INTAKE AND RETURN PASSAGEWAYS ARE CONNECTED.
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