Stowing method for goaf of potash salt ore

Abstract

The present invention relates to a stowing method for a goaf of potash salt ore comprising making wall slurry into barricades each have the same area as the sectional area of a tunnel and a thickness of 0.5 to 5 meters inside the underground tunnels in the goaf of potash salt ore, with the interval between adjacent barricades being 5 to 100 meters, then stowing the interval between said barricades by using the filling slurry. The stowing method of the present invention uses the wall slurry of high strength that is solidified with a gelling agent as the main bearing material, and uses the solidified filling slurry with a low strength as the main filling material, which has a good effect when compared with conventional filling materials in that, the amount of additives that are used is smaller, the solidification time is short, the stowing strength is more adjustable, and the stowing cost is lower. Moreover, it effectively utilizes the tail liquids, thereby reducing the addition of other additives, decreasing the cost, avoiding the discharge of liquid waste and relieving the environmental pressure.

Dependencies are inferred from the claim text.