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20 chapters · 634 sections in this title.
Va. Code Ann. § 45.2-843 Line brattice
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A. Substantially constructed line brattice shall be used from the last open crosscut of an entry or room when necessary to provide adequate ventilation for the miners and to remove gases. Any line brattice that is damaged by a fall or otherwise shall be repaired promptly. B. The …
Va. Code Ann. § 45.2-844 Ventilation with air from certain areas
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Active face workings shall not be ventilated with air that has passed through a worked-out area or has been used to ventilate a pillar line. This section shall not apply to air that is being used to ventilate an active pillar line or a room that is necessary to establish and main…
Va. Code Ann. § 45.2-845 Worked-out areas
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A. Every worked-out area shall be either sealed or ventilated. B. Where the practice is to seal worked-out areas, the sealing shall be done in accordance with sealing provisions of the approved bleeder plan.
Va. Code Ann. § 45.2-846 Air quality
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A. All active workings shall be ventilated by a current of air containing at least 19.5 percent by volume of oxygen and no harmful amount of any noxious or poisonous gas. B. The volume and velocity of the current of air in all active workings shall be sufficient to dilute, render…