煤系固体废物与污泥混合用于矿区复垦的试验研究

Study on Reclamation of Mining Area by Filling with Sludge and Coal-series Solid Wastes

矿区复垦作为生态恢复的重要手段,在国内外应用中有很多种方法,在此分析了粉煤灰、煤矸石及污泥各自的特点、应用特征,指出单一废物用于复垦存在的缺陷;通过对3种废弃物及其按不同质量比混合后各土样的pH值、电导率、氮(N)、磷(P)、钾(K)等理化指标的测定分析,研究了粉煤灰、煤矸石等煤系固体废物与污水处理厂排放污泥混合用于矿区复垦的可行性。结果表明:不同比例基质pH值、电导率、各配比样的营养标准均可满足植物生长的需要。说明该方法用于矿区生态修复的优势所在。

As the important method of ecological restoration, reclamation has many measures both at home and abroad. This paper analyzed each practical characteristic of flying coal ash, coal mining wastes and sludge to indicate the defects of single waste for reclamation. It also integrated several physicochemical indexes of the three solid wastes and the pro rata mixture, such as pH, electrical conductivity and content of N, P and K to study the feasibility of coal-series solid wastes and sludge using in reclamation of mining area. The results showed that the pH, electricity conductivity（EC）and nutrition level of substrate in different ratio meet the demand of plant growth, which indicated the dominant of this measure used in the reclamation of mining area.