Method for using phosphogypsum in mine goaf consolidated filling
A technology for cemented filling and goaf, which is applied in the field of cemented and filled phosphogypsum in goafs of mines, can solve the problems of not being able to solidify and reach compressive strength within one week, affecting mining efficiency, mining method limitations, etc. The effect of filling cycle, improving mining efficiency, and short curing time
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Embodiment 1
[0009] Use 1 part of cement, 1 part of water-quenched iron (steel) slag, 10 parts of phosphogypsum, and 0.4 part of lime, add water and stir to form a filling slurry with a weight concentration of 55%, and transport the filling slurry to the goaf of the mine. After a few days, it solidified into a high-strength filling body with a compressive strength of 2.31MPa.
Embodiment 2
[0011] Use 1.2 parts of cement, 1.2 parts of water-quenched iron (steel) slag, 14 parts of phosphogypsum, and 0.8 part of lime, add water and stir to form a filling slurry with a weight concentration of 65%, and transport the filling slurry to the goaf of the mine. After a few days, it solidified into a high-strength filling body with a compressive strength of 1.57MPa.
Embodiment 3
[0013] Use 0.8 parts of cement, 0.8 parts of water-quenched iron (steel) slag, 10 parts of phosphogypsum, and 0.6 parts of lime, add water and stir to form a filling slurry with a weight concentration of 60%, and transport the filling slurry to the goaf of the mine. After a few days, it solidified into a high-strength filling body with a compressive strength of 1.53MPa.
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