Large-dip-angle three-soft coal seam shallow deep hole water injection dustproof construction method

The invention belongs to the technical field of coal seam tunneling construction. The invention discloses a large-dip-angle three-soft coal seam shallow-deep hole water injection dustproof construction method which comprises a shallow hole water injection construction process and a deep hole water injection construction process. The shallow hole water injection construction technology specifically comprises the steps that shallow holes are constructed in the upper half section range of a working face open-off cut in the trend direction, the first shallow hole is formed in the position away from the working face air way lower coal wall by a certain distance, and other shallow holes are formed in a single row in the inclined direction of a coal seam; performing hole sealing and water injection operation on each shallow hole; the deep hole water injection construction technology specifically comprises the steps that deep holes are constructed in a working face air way in the coal seam inclination direction, the