GroundRules
4VAC25-40-5170: Failure of ventilation
Where this section sits in the code
- Title 4. Conservation And Natural Resources
- Agency 25. Department of Energy
- Chapter 40. Safety and Health Regulations for Mineral Mining
- Part XV. Safety and Health Regulations—Underground Only
- Article 11. Gassy Mines
When there has been a failure of mine ventilation other than a failure of a main fan as described in 4VAC25-40-5160, the operator shall:
1. Withdraw all persons from the unventilated active areas; and
2. De-energize the power in unvented active areas. The power shall not be restored or persons permitted to reenter the affected active areas until a certified foreman has determined that the flammable gas concentration in such active areas is less than 1.0%.
Collected 2026-09-14T04:46:10Z. Source file · JSON