Taking one regularization work of coal gob area as example a new method is introduced for grouting pipe connection, which successfully resolved the pull-out and reutilization issues of grouting pipe.

A method is introduced concerning downloading and pull-out of suface-layer casing pipe.

By analyzing the existing problems of case pulling from super thick unconsolidated stratum,the paper put forward a series of measures or plans in case design,pulling technique,restraining stratum swell and case protection,and it was proved to be applicable.