The invention discloses a method for filling
solid and recovering and fully mechanizing room type
coal pillars, comprising the following steps of: reinforcing and supporting a
coal pillar and a
coal room top plate in a pre-recovering room type
coal pillar area and suspending and hanging a wind curtain to form a
solid substance
haulage drift and a coal
haulage drift which are connected with a large
haulage drift; recovering the coal pillars by the conventional method, starting matching equipment after
cutting a coal interval and transporting the
solid substances to a goaf from the ground for filing and tamping; and
cutting coal of next coal interval and filling the goaf, repeating the steps until finishing the
recovery of all room type coal pillars. The method not only solves the problems that unstable
coal pillar causes the safety accidents due to the superposition of stress of the front part and two sides of a workface because of the
recovery of the traditional
coal pillar, but also eliminates the potential safety trouble caused by the hurricane, large-area sinking and the like caused by the
spontaneous combustion of the room type coal pillar and the large-area caving of hard top plates in the goaf. The invention has simple method, high production efficiency, low cost and over 85 percent of the
recovery rate of the coal pillars.