Sufficient air must be circulated and conducted through all entries, slopes, travelways, working places, air courses, and open abandoned areas to dilute, render harmless, and carry off noxious and explosive gases emitted in the mine, including smoke from blasting, and shall be not less than 150 cubic feet per man per minute. If mules or horses are used in a mine, 500 cubic feet per animal per minute must be provided in addition to the minimum volume specified for men.
Structure Code of Alabama
Title 25 - Industrial Relations and Labor.
Article 4 - Mine Gases and Ventilation.
Section 25-9-81 - Use of Methane Detectors.
Section 25-9-82 - Standards and Procedures as to Gases and Air Quality.
Section 25-9-83 - Standards as to Volume of Air.
Section 25-9-84 - Coursing of Air.
Section 25-9-85 - Sealing, Testing, etc., of Abandoned Workings.
Section 25-9-86 - Examinations for Gases and Other Dangerous Conditions.
Section 25-9-87 - Use of Flame Safety Lamps.
Section 25-9-88 - Reports as to Ventilation, Gas Content, Reopening of Mines, Etc.
Section 25-9-89 - Procedure When Workings Approaching Inaccessible Accumulations of Gases or Water.