Hydraulic power and fracturing combined resonant gas extraction method for coal bed and hole packer

The invention discloses a hydraulic power and fracturing combined resonant gas extraction method for a coal bed and a hole packer. The method comprises steps as follows: a fracturing drilling hole isformed in the preset position of a tunneling face, drainage drilling holes are formed in multiple directions of the fracturing drilling hole, and drilling operation is performed on the fracturing drilling hole; after drilling operation of the fracturing drilling hole is completed, annular cutting is performed on the fracturing drilling hole; the fracturing drilling hole is sealed through a fracturing drilling hole packer; the fracturing drilling hole is fractured after hole packing, and pulsed water injection is performed after a fracture develops full; drilling operation of the drainage drilling holes is performed while fracturing and pulsed water injection are performed on the fracturing drilling hole; and after drilling operation of the drainage drilling hole is completed, the drainagedrilling hole is packed by