This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of belt conveyors for coal mines. This standard applies to belt conveyors used underground in coal mines (hereinafter referred to as conveyors), and also applies to belt conveyors used in open-pit coal mines, coal preparation or other workplaces.
GB/T 3768-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane
MT 820-2006 history
2006MT 820-2006 Belt conveyor for coal mines. Technical specification