30 CFR Part 57Public Domain
§ 57.4461 — Gasoline use restrictions underground
Subpart C — Fire Prevention and Control
If gasoline is used underground to power internal combustion engines—
(a)The mine shall be nongassy and shall have multiple horizontal or inclined roadways from the surface large enough to accommodate vehicular traffic;
(b)All roadways and other openings shall connect with another opening every 100 feet by a passage large enough to accommodate any vehicle in the mine or alternate routes shall provide equivalent escape capabilities; and
(c)No roadway or other opening shall be supported or lined with wood or other combustible materials.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.