[Code of Federal Regulations] [Title 30, Volume 1] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 30CFR77] [Page 671] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 77_MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES--Table of Contents Subpart T_Slope and Shaft Sinking Sec. 77.1909 Explosives and blasting; use of permissible explosives and shot-firing units. Except as provided in Sec. 77.1909-1, only permissible explosives and permissible shot-firing units shall be used in sinking shafts and slopes.