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利用铁矿尾砂掺土培养实验,测定金山店铁矿尾砂掺土对其尾矿库边坡覆土即红色石灰土几种物理性质的影响,结果表明,铁矿尾砂掺土使土壤自然容重和压实容重分别增加了4.0%～26.8%和2.6%～24.8%,但与掺砂比例并不呈线性关系.随掺砂比例增加,土壤密度增加了1.7%～20.2%,与掺砂比例呈显著的线性相关.适当的掺砂比例可以显著增加土壤孔隙度.土壤吸湿系数随掺砂比例增加下降了10%～87%,与掺砂比例呈显著的线性负相关.随掺砂比例增加,土壤最大吸水量的变化可分为稳定、急降和缓降3个阶段.综合吸湿水和最大吸水量,适当的掺砂比例可以降低土壤凋萎系数,增加有效水的含量范围,从而能提高土壤抗旱能力.总之,适当比例的铁矿尾砂掺土可以改善土壤的物理性质,调节所用土壤的水、气状况,因此铁矿尾砂的土壤利用可以作为一种铁矿尾砂资源化利用的新技术,最佳掺砂范围应在30%～40%.
The experiments were carried out to study the effects of tailings doping on the physical properties of the tailings slope cover soil, red lime soil. The results showed that the tailings doping made the soil natural The bulk density and compacted bulk density increased by 4.0% ~ 26.8% and 2.6% ~ 24.8%, respectively, but not linearly with the proportion of sand.The soil density increased by 1.7% ~ 20.2% The proportion was significantly linear correlation.The appropriate proportion of sand can significantly increase the soil porosity.The soil moisture absorption coefficient decreased with the proportion of sand increased 10% ~ 87%, and the proportion of sand was significantly negative linear correlation with the proportion of sand Increase, the maximum soil water absorption changes can be divided into stable, rapid drop and slow down three stages.Comprehensive moisture absorption and maximum water absorption, the appropriate proportion of sand can reduce soil wilting coefficient, increase the effective water content range, which can Improve the ability of soil drought resistance.In short, the proper proportion of iron ore tailings can improve the physical properties of soil and adjust the water and gas conditions of the soil used, so the soil utilization of iron ore tailings can be used as an iron ore tailings resource The use of new technology, the best Sanding range should be 30% to 40%.