Information on the types and operation of loaders for tunnels and underground mines, configurations, power supply, brands, types

Information on the types and operation of loaders for tunnels and underground mines, configurations, power supply, brands, types Hi, if it were possible, I would like information on loaders, mechanical shovels, tunnel loaders, underground mines, types of chassis, power supply, brands, most popular brands, most used models, I believe they are articulated chassis on wheels, they run on electricity and diesel, I believe there are no tracked brands, I believe Caterpillar, can you help me, thanks, some drawings of the hydraulic systems, the most used and widespread models, what defects do they have, thanks Tamrock / Toro 007LHD​ Toro® LH515i​ Vagner Tunnellaster underground mining loader​