California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 17 - Mine Safety Orders
Article 22 - Fire Prevention and Control
General
Section 7061 - Heating Devices Underground
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) (4-58) Fire for space heating shall not be permitted underground. Torches, acetylene lamps, and candles shall not be left unattended in any mine in the vicinity of wood or other flammable material.
(b) Electric heaters underground shall be of a type in which the heating elements do not become hot enough to ignite combustible materials.
(c) Acetylene taken underground shall be in cylinders and shall be limited to necessary quantities. It shall be stored in a well-ventilated, fire-resistant location.
Empty cylinders shall be removed from the mine without unnecessary delay.
(d) (4-65) The following precautions shall be taken when welding equipment, blow torches, or other heat-producing devices or materials are used in a mine: