{"data":{"id":"us-va/4vac25-40-3475","jurisdiction":"us-va","citation":"4VAC25-40-3475","heading":"Blasting in gassy mines","body":"Blasts in gassy mines shall be initiated electrically, and multiple shot blasts shall be initiated with millisecond delay detonators.  Permissible blasting units of capacity suitable for the number of holes in a round to be blasted shall be used unless the round is fired from the surface when all persons are out of the mine.","path":["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 4. Explosives"],"source_url":"https://law.lis.virginia.gov/admincode/title4/agency25/chapter40/section3475/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:46:05Z","sha256":"998354dd14609c4cad02be90fe866441ea2e82592c1649e75e3fddb65afda59a","source_id":"us-va-vac","stale":false,"prev":"us-va/4vac25-40-3470","next":"us-va/4vac25-40-3478"},"notice":"GroundRules: Original legal text. Not legal advice."}