The utility model relates to a high-stability
drill carriage for a
coal mine, which comprises a main
machine body, a working mechanism, a front lower support component, a double-upright upper support component, a rear upper support oil cylinder, a rear lower support oil cylinder and a crawler walking device, a double-stand-column upper supporting
assembly, a
temporary operation table, a rear upper supporting oil cylinder, a hydraulic device, an auxiliary
oil tank and a
machine body operation table are arranged on the installation plate. The front end of the main
machine body is connected with a front lower supporting
assembly, and the rear end of the main machine body is connected with a rear lower supporting oil cylinder. The working mechanism comprises a sliding frame
assembly, a power head and a clamping device, and the sliding frame assembly is connected with the double-stand-column upper supporting assembly through a rotary speed
reducer. According to the whole
drill carriage, through the front lower supporting assembly, the double-stand-column upper supporting assembly, the rear upper supporting oil cylinder and the rear lower supporting oil cylinder, all-directional supporting and stabilizing are carried out when the
drill carriage drills, meanwhile, the drill carriage can stretch and retract according to the field environment, and applicability is high.