1.The brief introductions of ZLJ350 coal mine drilling rig ZLJ series coal mine tunnel drilling rig is mainly used for exploring water, exploring coal,drawing out methane, water injection dust control. The rig can work in various kinds of angles   This drill rig adopts mechanical drive, hydraulic feed with small size, light weight, The rig is reliable and convenient to operate. 2.The specifications of ZLJ350 coal mine drilling rig Drilling diameter 50-113mm Drill rod caliber 33.5mm-42mm Non-coring bit 50-89mm Core bit 56-89mm Vertical rated speed 375/214/120 r/min Vertical shaft torque rating 130/230 /400 n.m Main shaft angle 0-360 Spindle stroke 400mm System pressure rated 8mpa Feed force 9kn Elevating power 12kn Winch lifting capacity 7.35kn Drum capacity 26.8m Wire rope diameter 8.85mm Oil pump type YBC-12/125 Motor power 5.5kw Dimension 1250*640*1265mm Total weight 500kg