Method for freely regulating and controlling pipe burying depth of upper corner to extract gas in goaf

The invention discloses a method for freely regulating and controlling the pipe burying depth of an upper corner to extract gas in the goaf. The device comprises a buried pipe used for extracting gasin the goaf and an inserting pipe used for extracting gas in a closed wall of the upper corner, and the buried pipe is paved on a roadway bottom plate. According to the method for freely regulating and controlling the pipe burying depth of the upper corner to extract the gas in the goaf, in the replacement process, cutting fluid and an air pipe are adopted for independently treating a blade and acutter head cutter holder, and the cost for burying the pipe in the goaf once is saved; and by means of the specially-made stuffy disc device, the opening and closing states of all vertical pipe stuffy discs in the goaf can be freely adjusted and controlled outside the upper corner airtight wall, the maximization of the gas extraction effect of the buried pipe goaf is guaranteed, the pipeline consumption cost can be effect