30 C.F.R. § 75.201 Definitions.
Title 30 - Mineral Resources
Automated temporary roof support (ATRS) system. A device to provide temporary roof support from a location where the equipment operator is protected from roof falls. Pillar recovery. Any reduction in pillar size during retreat mining.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart C—Roof Support
§ 75.201 Definitions.
