This standard specifies the safety requirements for the underground L.H.D.
This standard limits the underground L.H.D in terms of physical property and preset application.
The safety requirements specified in this standard are for all hazards of underground L.H.D and are applicable to all hazards in all stages of L.H.D life as described in 3.11 in GB/T 15706.1-1995.
This standard is applicable to underground internal combustion L.H.D and underground electric L.H.D used in mines (except coal mine), projects and tunnels.