57.6161—Auxiliary facilities.
(a)
Auxiliary facilities used to store explosive material near work places shall be wooden, box-type containers equipped with covers or doors, or facilities constructed or mined-out to provide equivalent impact resistance and confinement.
(5)
Identified with warning signs or coded to indicate the contents with markings visible from any approach;
(6)
Located at least 15 feet from all haulageways and electrical equipment, or placed entirely within a mined-out recess in the rib used exclusively for explosive material;