Filling slurry for filling mining method and preparation method for filling slurry
A backfill mining method and filling slurry technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as unfavorable mining costs, unsafe mine production, and increased filling costs.
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Embodiment 1
[0024] A phosphate fertilizer factory of a limited liability company adopts a filling paddle of the filling mining method of the present invention and its preparation method. The filling paddle is made of the following materials:
[0025] Tailings, ultrafine powder, cement and mining waste; the formula of each material by weight:
[0026] Cement: ultrafine powder=0.8:0.2, sand-cement ratio is 4; mining waste residue is particles smaller than 2cm, the ratio of mining waste residue to tailings is not fixed; slurry concentration is 70%;
[0027] Filling paddle preparation method:
[0028] The tailings with a concentration of about 20% are thickened into high-concentration tailings with a concentration of more than 65% through pressure filtration or deep cone thickening, and the separated water is returned to the beneficiation process; the above-mentioned concentration of more than 65% The high-concentration tailings are transported to the filling preparation station at the ent...
Embodiment 2
[0031] Filling paddles are made of the following materials:
[0032] Tailings, ultrafine powder, cement and mining waste; the formula of each material by weight:
[0033] Cement: ultrafine powder = 0.8:0.2, sand-cement ratio 12; mining waste residue is granular aggregate less than 2cm, the ratio of mining waste residue to tailings is not fixed; slurry concentration is 70%; filling paddle preparation method is the same as in Example 1.
[0034] The strength of the filling body was tested to be 0.443MPa.
Embodiment 3
[0036] The filling material is made of the following materials:
[0037] Tailings, ultrafine powder, cement and mining waste; the formula of each material by weight:
[0038] Cement: ultrafine powder = 0.4:0.6, sand-cement ratio is 4; mining waste residue is granular aggregate less than 2cm, the ratio of mining waste residue to tailings is not fixed; slurry concentration is 70%; filling paddle preparation method is the same as in Example 1 .
[0039] The strength of the filling body was tested to be 2.085MPa.
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