Drilling jumbo

It is considered as a powerful tool to facilitate labor-intensive process for mineral extraction.

[further explanation needed] The carriages are bolted onto the chassis, which supports the miner's cabin as well as the engine.

Although modern drilling jumbos are relatively large, there are smaller ones for use in cramped conditions.

Whereas modern jumbos are usually fitted with rubber tires and diesel-powered, there are also exist variants with steel wheels, to ride on rails and even single carriage sled-mounted ones.

[example needed] Electricity and compressed air produce little to no exhaust gases, which is preferable if work is done in smaller tunnels where good ventilation is difficult.