Abstract:

In order to achieve the goal of high-quality paste filling in a copper mine of Hubei Prov⁃

ince，aiming at the problems of low slurry concentration，large underground drainage and high filling cost，

a study on the optimization of the filling ratio of the whole-tailing paste was carried out. The test results

show that，when the cementing powder is used as the cementing material for paste filling，the cement-sand

ratio of the filling body that meets the production requirements of the mine is 1∶7，and the slurry concentra⁃

tion is greater than 68%. When P.O42.5 ordinary Portland cement is used as paste filling cementing materi⁃

al，the cement-sand ratio of the filling body that meets the production requirements of the mine is 1 : 3，

and the slurry concentration is greater than 71%.Compared with P.O42.5 ordinary Portland cement，the use

of cementing powder can save the cost of filling materials by 13.687 million yuan/a，and the economic bene⁃

fits are remarkable. The results of this study can provide a theoretical basis for the selection of binders in

the later paste filling process.

Key words:

paste filling, slurry ratio, filling body strength, filling cost