The jumbos for underground tunnels, used in underground tunneling and production for blast holes, anchor holes, cut holes, etc., generally have 1-2 rock booms, each of which is assembled with a hydraulic drifter to drilling holes with depth of 2-4 meters.
The highly automated jumbos are developing towards intelligent operation, safety and environmental protection.
Present common jumbos used in China mainly include:
DW2-50, DW1-45 and DWE1-24 jumbos, and DT2-23 and CMJ2-18 coal mine jumbos from Jiangxi Siton
CYTJ45 underground jumbos and CMJ2-30 coal mine jumbos from Xuanhua Huatai
DD421, DD321, DD311, DD2711 and DT821 jumbos from Sandvik,
Boomer 291, Boomer K41 rock and Boomer 282 jumbos from Epiroc
T1AM and T2AM jumbos from Furukawa Japan