Coal Mine collapse basin was unused land,and it was natural constructed wetland model too.Fly-ash of coal as substrates used in constructed wetland systems and plant some aquatic macrophyte.

• 煤矿塌陷区是闲置土地,它也是天然人工湿地模型,以粉煤灰为基质,栽种某些水生植物即可组成人工湿地,它不仅可以很好的处理矿区污水,也可用以农作物灌溉或处理回用,同时还能实现粉煤灰的资源化利用;