Drilling device of bottom plate of coal mine tunnel

The utility model relates to the technical field of coal mining, and discloses a drilling device of a bottom plate of a coal mine tunnel. The device comprises a double channel drill, a double channel drill pipe, a drilling machine, a hydraulic column, a sewage pump and a double channel faucet provided with three joints. The drilling machine drives the double channel drill pipe to propel and lift rotatably. The joint of the double channel faucet connected with the double channel drill pipe can rotate freely, while the other two joints connected with a high pressure water pipe and a water sucking hose can not rotate freely. A first channel of the drill is connected with the high pressure water pipe through a first channel of the drill pipe and a first channel of the faucet sequentially. A second channel of the drill is connected with the water sucking hose through a second channel of the drill pipe and a second channel of the faucet sequentially. The drilling device of the bottom plate of the coal mine tunnel provided by the utility model in the drilling process of an anchor rod (cable) of the bottom plate of the tunnel realizes continuous work, drills a deep hole quickly with strong deslagging capacity. The drilling device is simple, convenient and practical to operate, and the work environment does not hurt human body and environment.