Prevention treatment method for fully mechanized coal mining face

The invention discloses a fully mechanized coal mining face prevention and treatment method which comprises the following steps: when a working face is stoped to climb towards an oblique shaft part, pre-grouting holes are drilled in a lower side of a return airway and an upper side of a transportation roadway at preset intervals, and high polymer materials are injected into the pre-grouting holes; a plurality of groups of grouting points are arranged in the overall inclination range of the working face, and grouting is performed from the grouting points corresponding to the area to the goaf position corresponding to the area for the area with the top coal remaining thickness exceeding the preset thickness threshold value till filling of the area is completed; when roof caving occurs in the climbing process of the working face, a grout stopping wall is built to seal a cavity formed by roof caving, a roof caving filling grouting hole is reserved, a macromolecule filling body is injected into the roof caving fil