矿物肥料对露天矿排土场土壤抗冲性增强效应

Enhancement effects of mineral fertilizers on soil anti-scourability of dump of open pit

为了深入研究开发建设项目土壤侵蚀过程机理,加快矿山废弃地土地复垦进程,采用改进的原状土水槽冲刷法,研究了矿物肥料对露天矿排土场土壤抗冲性的影响。结果表明:不同处理下土壤径流含沙量都呈现先减小后增大再减小的动态变化趋势,对照径流含沙量表现为>粉煤灰>沸石>草炭;不同处理下土壤抗冲指数ANS与时间t之间存在显著的二次多项式回归关系;不同处理下的土壤抗冲指数表现为草炭>沸石>粉煤灰>对照。该研究可为开发建设项目水土流失治理提供理论依据。

In order to study the soil erosion mechanism and process at the construction site of open pit dump,and speed up the process of mining waste land reclamation,the impact on of open pit mine waste dump from mineral fertilizers was investigated using an improved water tank undisturbed soil erosion method.The results show that with the different soil treatments,the soil runoff sediment concentration presents a dynamic trend as decreases at the beginning,and increases and then decreases.The sediment concentration of runoff are compared as controlled fly ash zeolite peat.There is an obvious quadratic regression relationship between the index of soil anti-scourability ANS and time t under different treatments.Also,the performance of the index of soil anti-scourability is in the sequence as peat zeolite fly ash controlled.The study provides a theoretical basis for controlling soil erosion in a construction on open pit dump.