High-pumpability filling material for phosphate mine, and preparation method of filling material

Abstract

The invention relates to a filling material and a preparation method thereof. A high-pumpability filling material for phosphate mine is characterized by being prepared from a cementing material, aggregate, water and an additive, wherein the mass percent contents of the cementing material, the aggregate and the water are as follows: the cementing material accounts for 10-30%, the aggregate accounts for 60-85%, and the water is as balance; the additive comprises a water reducing agent and an activating agent, wherein the adding amount of the water reducing agent is 0.5-1.5% of the mass of the cementing material, and the adding amount of the activating agent is 5% of the mass of industrial waste residue in the cementing material; the cementing material is prepared from cement, sub-micron ultrafine reactive powder and industrial waste residue, wherein the cement accounts for 40-70% of the mass of the cementing material, the sub-micron ultrafine reactive powder accounts for 15-40% of the mass of the cementing material, and the industrial waste residue accounts for 0-35% of the mass of the cementing material. The filling material has the characteristics of being high in pumpability, low in water segregation amount, high in strength and low in filling cost.

Description

technical field [0001] The invention relates to a filling material and a preparation method thereof, in particular to a filling material for phosphate mines with high pumpability and a preparation method thereof. Background technique [0002] The filling and filling mining method is a kind of artificial support mining method. The filling mining method can be divided into three types according to the filling materials used in mining and the filling transportation method: dry filling method, hydraulic filling method and cemented filling method. Stone, river sand or tailing sand or Gobi aggregates are used as aggregates (occasionally mixed with block stones), and then mixed with inorganic cementitious materials such as cement to form paste or slurry, which is pumped by pipeline or gravity flow The filling delivered to the filling area. Metal mines and coal mines are usually filled with paste. The fluidity of the filling material is very good, but the strength is low (28-day s...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of poor fluidity and high bleeding of high-strength filling materials, the purpose of the present invention is to provide a high-pumpability, low-bleeding, high-strength and low-filling filling material for phosphate mines. and its preparation method

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