用粉煤灰对煤矿排土场土壤改良可行性研究

Feasibility studies on coal-fly-ash application in refuse dump of coal mine for soil improvement

针对煤矿排土场上植物稀少、植被的自然定居和生态系统的原生演替过程极其缓慢的现状,采用实验分析的方法,初步探索了排土场土壤和粉煤灰的理化性质。分析结果表明,排土场土壤质地差、无任何结构、渗透性差、土壤坚实、有效水分及营养元素含量低。而粉煤灰中含有丰富的硅、磷、钾、氮等营养元素及矿物质,它不仅能改良土壤结构,而且能补充排土场土壤中缺乏的营养元素和矿物质,提高土壤肥力。该分析结果对矿业废弃地的土壤改良具有一定的参考价值。

According to the situation of plants scarce on soil refuse dump of coal mine,and extremely slow native settlement process Of vegetation and ecosystems,soil and the coal-fly-ash have been analysed for the physical and chemical nature.The results show that the soil quality is poor, with low effective moisture and nutritional elements,without no structure.But the coal-fly-ash contains rich silicon,phosphorus,potassium,nitrogen and other nutritional elements and minerals,it can not only improve soil structure, but also add the nutritional elements and minerals to improve soil fertility.The results of the analysis has some referent value in soil improvement.