Groove broaching method for local variable inclination of hanging wall of steeply inclined thick ore body

The invention relates to a slot broaching method for local variable inclination of a hanging wall of a steeply inclined thick ore body. The slot broaching method comprises the following steps: (1) designing an access road, an in-vein rock drilling roadway and an out-vein transportation roadway; (2) determining a broaching groove space distance and a construction position of a hanging wall cutting roadway; (3) after the hanging wall cutting roadway is constructed, the cutting courtyard is constructed according to the design, then a longitudinal grooving medium-length hole row face is constructed along the access road, and then a transverse grooving medium-length hole row face is constructed along the hanging wall cutting roadway; (4) after construction of the longitudinal grooving medium-length hole row surface and the transverse grooving medium-length hole row surface is completed, medium-length hole mining design is carried out, and a medium-length hole front row surface is formed; performing normal access m