龙都尾矿库中线法筑坝尾矿料的物理力学性能研究

Physical and Mechanics Properties of Tailings from Longdu TailingsPond Constructed by Centerline Embankment Method

中线法堆积高尾矿坝的案例在国内外并不多见。大红山龙都尾矿库拟在上游法堆坝达到100.0m高的基础上,改用中线法继续堆积尾矿坝,使其达到180.0m高。为论证筑坝方案的可行性,对旋流分级产生的沉砂尾矿和溢流尾矿的物理力学性能进行了测试分析。结果表明:沉砂尾矿的压缩性、渗透性、抗剪强度参数均比溢流尾矿好;而且尾矿的压缩性、渗透性与尾矿的粒径大小、孔隙比的关系密切。通过旋流分级后,能满足中线法堆坝的要求。

The case of high tailings dam constructed by using centerline embankment method is rare at home and abroad. Dahongshan Longdu railings dam has been constructed up to 100 m high by using upstream embankment method, the dam will continue to be constructed up to 180 m high by u- sing centerline embankment method. In order to demon- strate the feasibility of this project, the physical and me- chanics properties of underflow tailings and overflow tailings produced by cyclone classifier were test and analyzed. The results showed that the compressibility, permeability and shear strength of the underflow tailings was better than that of the overflow tailings, and the compressibility, permeabili- ty and shear strength of tailings were closely related to itspartial size and void ratio.