A. The quantity of air passing through the last open crosscut shall be at least 9,000 cubic feet per minute. However, the quantity of air reaching the last open crosscut in a pillar-recovery section may be less than 9,000 cubic feet per minute if at least 9,000 cubic feet of air per minute is being delivered to the intake end of the pillar line.
B. The air current at a working face shall, under all conditions, have a sufficient volume and velocity to readily dilute and carry away smoke from blasting and any flammable or harmful gases and dust.
C. In a longwall or shortwall mining system:
1. The quantity of air shall be at least 30,000 cubic feet per minute reaching the working face, unless otherwise approved by the Chief; and
2. The velocity of air provided to control dust at designated locations on the longwall or shortwall face shall be maintained in accordance with the provisions of the mine ventilation plan approved by MSHA.
D. Ventilation shall be maintained during the installation or removal of mechanized mining equipment.
Code 1950, §§ 45-4.1, 45-9, 45-12, 45-60.4, 45-74; 1954, c. 191; 1966, c. 594, §§ 45.1-5, 45.1-56; 1968, c. 310; 1976, c. 598; 1978, c. 120; 1984, c. 236; 1985, c. 448; 1987, c. 470; 1990, c. 963; 1993, c. 442; 1994, c. 28, § 45.1-161.219; 1996, c. 774; 2005, c. 3; 2021, Sp. Sess. I, c. 387.
Structure Code of Virginia
Title 45.2 - Mines, Minerals, and Energy
Chapter 8 - Requirements Applicable to Underground Coal Mines; Electricity, Safety, Etc
§ 45.2-800. Face and other equipment
§ 45.2-801. Shop and other equipment
§ 45.2-803. Surface electrical installations
§ 45.2-804. Surface transformers
§ 45.2-805. Underground transformers
§ 45.2-806. Stations and substations
§ 45.2-808. Trolley wires and feeder wires
§ 45.2-810. Circuit breakers and switches
§ 45.2-811. Communication systems
§ 45.2-812. Electrical equipment
§ 45.2-814. Inspection of electrical equipment and wiring; checking and testing methane monitors
§ 45.2-815. Repairs to circuits and electric equipment
§ 45.2-816. Underground illumination
§ 45.2-817. Inspection of electric illumination equipment
§ 45.2-818. Firefighting equipment; fire prevention
§ 45.2-819. Duties in case of fire
§ 45.2-820. Emergency response plans; list of next of kin
§ 45.2-821. Reporting fires; response
§ 45.2-822. Fire prevention in transportation of mining equipment
§ 45.2-823. Storage and use of flammable fluids and materials
§ 45.2-824. Diesel-powered equipment
§ 45.2-825. Arcs, sparks, and flames
§ 45.2-826. Pre-shift examinations
§ 45.2-827. on-shift examinations
§ 45.2-828. Weekly examinations
§ 45.2-829. Examinations of fans
§ 45.2-830. Record of examinations
§ 45.2-831. Notice of hazardous conditions
§ 45.2-832. Notice of monitor tampering prohibition
§ 45.2-839. Actions for excessive methane
§ 45.2-841. Permanent stoppings
§ 45.2-842. Ventilation controls
§ 45.2-844. Ventilation with air from certain areas
§ 45.2-847. Examination of mine for explosive gas and other hazardous conditions
§ 45.2-848. Tampering with methane monitoring devices prohibited; penalty
§ 45.2-850. Intentionally bypassing a safety device; prohibition
§ 45.2-851. Control of coal dust
§ 45.2-853. Checking system; tracking system
§ 45.2-854. Protective clothing
§ 45.2-855. Noise levels and ear protection
§ 45.2-856. Smoking materials prohibited; penalty
§ 45.2-857. Allowing persons to work in a mine with smoker's articles; penalty
§ 45.2-859. Smoking in surface and other areas
§ 45.2-860. Portable illumination
§ 45.2-861. First aid equipment