Code of Virginia

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Code of Virginia
Title 45.1. Mines and Mining
Chapter 14.3. Requirements Applicable to Underground Coal Mines

§ 45.1-161.229. (Repealed effective October 1, 2021) Air quality.

A. All active workings shall be ventilated by a current of air containing not less than 19.5 volume percent of oxygen and no harmful quantities of other noxious or poisonous gases.

B. The volume and velocity of the current of air in all active workings shall be sufficient to dilute, render harmless and carry away flammable, explosive, noxious and harmful gases and dust, smoke, and explosive fumes.

Code 1950, § 45-60.3; 1954, c. 191; 1966, c. 594, § 45.1-63; 1968, c. 310; 1993, c. 442; 1994, c. 28; 1996, c. 774; 2005, c. 3.

The chapters of the acts of assembly referenced in the historical citation at the end of this section may not constitute a comprehensive list of such chapters and may exclude chapters whose provisions have expired.