Method for protecting roadway under top-cutting gob-side entry retaining of coal seam containing dirt band

The invention discloses a method for protecting a roadway under top-cutting gob-side entry retaining of a coal seam containing dirt band. The method comprises the following steps: finishing roadway arrangement of a working face; mining equipment such as a working hydraulic support and a scraper conveyor is installed in the working face open-off cut; in the mining roadway of the working face, pre-splitting blasting holes and loosening blasting holes are constructed in the top plate along the mining side, explosive is filled, pre-splitting and loosening blasting are conducted on the roadway top plate, and it is guaranteed that blasting construction is not affected by advanced mining-induced pressure; a transshipment crusher and a bottom-dump conveyor are installed behind a working face, a goaf beside a roadway is filled with broken dirt bands mined from the working face, then concrete is used for injection, a pouring gangue wall beside the roadway is formed, and reserving and maintaining of the roadway are completed. An artificial wall body is built in the goaf to support an overlying rock layer, gangue generated by presplitting and loosening blasting is arranged above the artificial wall body, unification of yielding and bearing is achieved, stability of a roadway during the mining influence period is powerfully guaranteed, meanwhile, the goaf is isolated, and threats of gas, spontaneous combustion and the like are avoided.