中文摘要：

为研究浸矿对离子型稀土矿物理力学性质的影响,分别对浸矿前后的稀土矿样做直接剪切试验,根据库仑定律求出稀土矿的抗剪强度指标,结合颗粒筛分试验,分析浸矿对离子型稀土矿颗粒粒径和强度的影响规律,结果表明：浸矿发生的离子交换反应改变了离子型稀土矿颗粒的成分、粒径和级配,进而改变了稀土矿区的强度等力学性质;浸矿使稀土矿黏聚力降低50%左右,内摩擦角约增加15%,级配变差.本文的研究将为稀土开采中的边坡稳定和浸矿后尾矿的治理和综合利用提供一定的理论指导.

英文摘要：

The direct shear experiments of rare earth ore samples before and after leaching are performed to analyze the effect of leaching technology on the physical and mechanical properties of ion-adsorption rare earth ore. The shear strength parameters of rare earth ore are worded out using Coulomb＇s law. The effect of leaching on the mineral particle size and shear strength of rare earth ore are analyzed through strength experiment results with combinations of sieve analysis test. The experiment results indicate that ion exchanges process in leaching changes the ingredient, granularity and grading of mineral particles. The shear strength and other mechanical properties of rare earth ore mining region change accordingly. The cohesive force decreases by half and the internal friction angle increases by 15 % after leaching. The mineral particle grading deteriorates, but not significantly. This study provides references for the slope stability in rare earth mining and the comprehensive treatment and utilization of tailings after leaching.