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Application of Graining high-water filling sealing materials in mines Source: Hebei Xinhe Maosen Polyurethane Co., Ltd.
With the continuous development of the mining industry and the increasing depth of mining, 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 surface tailings treatment costs and land occupation, and slows down environmental pollution. , turning waste into treasure, turning harm into benefit, 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. The 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 drained away from the stope through percolation. A dewatering system must be set up underground. The filling process is complicated and pollutes the underground production environment
) Due to the During the dehydration process, cement and fine-grained tailings easily overflow with water, resulting in large cement loss and low utilization rate, resulting in low strength and uneven distribution of the filling body, failing to meet the design specifications, and increasing the secondary dilution and loss of the ore< br/>) The dehydration process is long and the cement sets slowly, which results in a long maintenance period for the filling body and 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 Characteristics of Grainin high water filling 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 3~ and are sent to the underground. After being mixed by the mixer, they are filled into the stope. Within hours , it can be condensed into a filling body without dehydration, and it can be put into operation in an hour. This new filling technology fundamentally solves a series of problems such as the complexity of grading tailings slurry, difficulty in high-concentration transportation and non-top filling in cemented filling operations, and opens up a new way to achieve high-efficiency, high-concentration and high-intensity mining. way.