Application of Graining high water filling and sealing materials in metal mines

The application of Graining high-water filling and sealing materials in metal mines. With the continuous development of the mining industry and the increasing mining depth, the problem of ground pressure has become more and more prominent. At the same time, issues such as ore loss and dilution, mine environmental protection, and mine economic benefits have attracted more and more attention. Especially in the mining process of non-ferrous metals and precious metal ores, the advantages of filling technology have been recognized and accepted by people. As a commonly used filling material, tailings are used in underground filling, which not only solves the problem of the source of inert aggregate for filling, meets the needs of filling goafs, but also saves the cost of surface tailings treatment and land occupation, and slows down the pollution to the environment and turns it into waste. Turning harm into profit and improving the economic benefits of the entire mine. The traditional hydraulic tailings cement filling technology in my country uses ordinary cement as the cementing material. Its basic process is to prepare a filling slurry with a concentration of ~% on the surface and transport it to the underground stope through boreholes or pipelines. There are serious technical problems with this approach.
) The excess water in the filling slurry needs to be extracted from the stope and drained underground through percolation, and a dewatering system must be set up. The filling process is complicated and pollutes the underground production environment
) Due to the dehydration process of the filling material Cement and fine-grained tailings are easy to overflow with water. The cement loss is large and the utilization rate is low. The strength of the filling body is low and the distribution is uneven. It cannot meet the design specifications and increases the secondary dilution and loss of the ore.
) The dehydration process is long. , The slow setting of cement is due to the long maintenance period of the filling body, which affects the stope operation cycle
One of the effective ways to solve the above-mentioned major and difficult technical problems in cemented tailings filling is to use the characteristics of Graining high-water filling and sealing materials. . The two solid materials A and B of the Graining high-water filling sealing material are combined with the tail mortar to make two filling slurries with a concentration of ~% and are sent to the underground to be mixed with a mixer and then filled into the stope without dehydration within hours. It can be condensed into a filling body and ready for equipment operation within a few hours. This new filling process fundamentally solves a series of problems such as the complexity of graded tailings slurry, difficulty in high-concentration transportation, and failure to connect to the top in cemented filling operations, and opens up a new way to achieve high-efficiency, high-concentration, and high-intensity mining. .