§57.4000. Definitions.
30 C.F.R. § 57.4000
Combustible liquids. Liquids having a flash point at or above 100 °F (37.8 °C). They are divided into the following classes:
Escapeway. A designated passageway by which persons can leave an underground mine.
Flash point. The minimum temperature at which sufficient vapor is released by a liquid to form a flammable vapor-air mixture near the surface of the liquid.
Main fan. A fan that controls the entire airflow of an underground mine or the airflow of one of the major air circuits of the mine.
Mine opening. Any opening or entrance from the surface into an underground mine.
Safety can. A container of not over five gallons capacity that is designed to safely relieve internal pressure when exposed to heat and has a spring-closing lid and spout cover.
Notes, amendments, and revision history
Amendments
[50 FR 4082, Jan. 29, 1985, as amended at 68 FR 32361, May 30, 2003; 69 FR 38842, June 29, 2004]
Authority
Authority: Sec. 101, Federal Mine Safety and Health Act of 1977, Pub. L. 91-173 as amended by Pub. L. 95-164, 91 Stat. 1291 (30 U.S.C. 811).
Authority
Authority: 30 U.S.C. 811.
Source
Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.
Amendments
[50 FR 4082, Jan. 29, 1985, as amended at 68 FR 32361, May 30, 2003; 69 FR 38842, June 29, 2004]