Comprehensive weakening method of top coal of heavy-pitch super high seam

The invention discloses a comprehensive weakening method of top coal of a heavy-pitch super high seam. The comprehensive weakening method comprises the following steps of: 1. drilling a hole in an intake airway of the seam; 2. forwards filling a latex-matrix explosive to the drilled hole in the step 1, then carrying out hole-sealing processing on the drilled hole filled with the explosive by using a hole packer, and detonating the explosive to explode the seam after the hole-sealing process is finished; 3. preparing alkaline medium suspension liquid; and 4. injecting the alkaline medium suspension liquid into the exploded drilled hole by using an injection pump, and then carrying out hole-sealing processing on the drilled hole filled with the alkaline medium suspension liquid, so as to enable the injected alkaline medium suspension liquid to permeates to cracks in the seam. According to the comprehensive weakening method, the drilled hole is exploded firstly and is then filled with the alkaline medium suspension liquid, and the alkaline medium suspension liquid permeates into the seam, so that the cracks in the exploded coal body can be developed and promoted further, and the top coal is weakened; and meanwhile, the alkaline medium suspension liquid can be used for neutralizing H2S gas in the seam, thereby eliminating the damage caused by abundant gushing of a great deal of H2S gas in the production process.