CAJ | 학술논문

　　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％．
　　이용철광미사참토배양실험，측정금산점철광미사참토대기미광고변파복토즉홍색석회토궤충물이성질적영향，결과표명，철광미사참토사토양자연용중화압실용중분별증가료4．0％～26．8％화2．6％～24．8％，단여참사비례병불정선성관계．수참사비례증가，토양밀도증가료1．7％～20．2％，여참사비례정현저적선성상관．괄당적참사비례가이현저증가토양공극도．토양흡습계수수참사비례증가하강료10％～87％，여참사비례정현저적선성부상관．수참사비례증가，토양최대흡수량적변화가분위은정、급강화완강3개계단．종합흡습수화최대흡수량，괄당적참사비례가이강저토양조위계수，증가유효수적함량범위，종이능제고토양항한능력．총지，괄당비례적철광미사참토가이개선토양적물이성질，조절소용토양적수、기상황，인차철광미사적토양이용가이작위일충철광미사자원화이용적신기술，최가참사범위응재30％～40％．
In order to understand the effects of iron ore tailing sands on soil physical properties , an experiment of mixing iron ore tailing sands from Jinshandian tailings pond with calcareous red earth used as covering soil on the slope of Jinshandian tailings pond was conducted and the soil physical properties was determined . The results showed that mixing tailing sands with soil had significant effect on soil physical properties . The bulk density of natural and compacted soil was respectively increased 4 .0% ~26 .8% and 2 .6% ~24 .8% by mixing tailing sand with soil ,but it did not linearly increased with ratio of sands to soil .Soil density was linearly increased 1 .7% ~20 .2% with the ratio of sands to soil .Soil porosity was significantly influenced by mixing tailing sands with soil and was increased by proper ratio of sands to soil .Soil hygroscopic coefficient was decreased 10% ~87% by mixing sands with soil and was significant negative linearly correlative to the ratio of sands to soil . With the increase of ratio of tailing sands to soil ,the maximum water holding capacity was divided into stable ,fast decline and slow decline stages . Under integration of soil hygroscopic coefficient and maximum water holding capacity ,a proper mixing ratio of tailing sands to soil can decrease the wilting point ,increase the range of soil available water and increase soil drought resistance .In summary ,the application of iron ore tailing sands to soil is a new technique to use iron ore tailings as resource because of its improvement of soil physical properties and regulation of soil water and gas situation and the best mixing rate of iron ore tailings to soil is from 30% to 40% .