Vibratory drag reduction method of drill column for directional drilling of approximate horizontal long drill holes of underground coal mine

A vibratory drag reduction method of a drill column for directional drilling of approximate horizontal long drill holes of an underground coal mine comprises a conventional directional drilling, vibration generator installing position determination, vibratory drag reduction drilling construction method and the like. The size and material of the drill column are determined by (omitting) a vibrationgenerator installing position and according to a excitation force amplitude value, a front portion is caused, a rear portion drill column is driven to vibrate, meanwhile the stress waves produced invibration are transferred to an instrument for measurement while drilling and disappear in front of a hole bottom drill, and normal use of the instrument for measurement while drilling and the hole bottom drill is not affected. Therefore, a vibration function of the drill column during directional drilling of deep holes of the underground coal mine is achieved, a static friction force is convertedinto a movable friction fo