中国矿山工程

In order to improve the comprehensive utilization rate of tailings and reduce the storage capacity pressure of tailings pond, a gold mine needs to transform the existing classified tailings filling system into a high-concentration unclassified tailings filling system. In this paper, the unclassified tailings filling slurry of this gold mine is taken as the research object, and the rheological properties and influence patterns of the unclassified tailings filling slurry with different mass concentrations and lime-sand ratios are analyzed through indoor rheological tests. Based on FLUENT software, the numerical simulation model of filling pipeline transportation in the whole mine is established, and the results show that the numerical simulation model features high accuracy, which has important guiding significance for optimizing mine filling system. According to the calculation results of resistance loss along the way, the maximum allowable ratio of filling pipe line length and height Nmax and critical transportation concentration of unclassified tailings cemented filling slurry are calculated, which provides reliable data support for the design of the next-stage filling system of the mine.