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50 FR 4082, Jan. 29, 1985, unless otherwise noted.
61 FR 36801, July 12, 1996, unless otherwise noted.
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Subscribe to: 30 CFR Part 57 Subpart E - General Requirements—Surface and Underground
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Damaged or deteriorated explosive material shall be disposed of in a safe manner in accordance with the instructions of the manufacturer.
(a) Black powder shall be used for blasting only when a desired result cannot be obtained with another type of explosive, such as in quarrying certain types of dimension stone.
(b) Containers of black powder shall be—
(1) Nonsparking;
(2) Kept in a totally enclosed cargo space while being transported by a vehicle;
(3) Securely closed at all times when—
(i) Within 50 feet of any magazine or open flame;
(ii) Within any building in which a fuel-fired or exposed-element electric heater is operating; or
(iii) In an area where electrical or incandescent-particle sparks could result in powder ignition; and
(4) Opened only when the powder is being transferred to a blasthole or another container and only in locations not listed in paragraph (b)(3) of this section.
(c) Black powder shall be transferred from containers only by pouring.
(d) Spills shall be cleaned up promptly with nonsparking equipment. Contaminated powder shall be put into a container of water and shall be disposed of promptly after the granules have disintegrated, or the spill area shall be flushed promptly with water until the granules have disintegrated completely.
(e) Misfires shall be disposed of by washing the stemming and powder charge from the blasthole, and removing and disposing of the initiator in accordance with the requirement for damaged explosives.
(f) Holes shall not be reloaded for at least 12 hours when the blastholes have failed to break as planned.
(a) Where heat could cause premature detonation, explosive material shall not be loaded into hot areas, such as kilns or sprung holes.
(b) When blasting sulfide ores where hot holes occur that may react with explosive material in blastholes, operators shall—
(1) Measure an appropriate number of blasthole temperatures in order to assess the specific mine conditions prior to the introduction of explosive material;
(2) Limit the time between the completion of loading and the initiation of the blast to no more than 12 hours; and
(3) Take other special precautions to address the specific conditions at the mine to prevent premature detonation.
If explosive material is suspected of burning at the blast site, persons shall be evacuated from the endangered area and shall not return for at least one hour after the burning or suspected burning has stopped.
Smoking and use of open flames shall not be permitted within 50 feet of explosive material except when separated by permanent noncombustible barriers. This standard does not apply to devices designed to ignite safety fuse or to heating devices which do not create a fire or explosion hazard.
(a) Explosive material shall be protected from temperatures in excess of 150 degrees Fahrenheit.
(b) Explosive material shall be protected from impact, except for tamping and dropping during loading.