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利用发电厂排出的粉煤灰充填煤矿塌陷区，表面覆土３０ｃｍ，改造成“人工土壤”，于１９９０年营造欧美杨（Ｐｏｐｕｌｕｓ×ｅｕｒａｍｅｒｉｃａｎａｃｖ．＇Ｎｅｖａ＇）人工林。土壤管理措施主要有：覆土厚度处理（０、３０、５５ｃｍ和灰土混合４种处理），施肥处理（正交设计共１６种处理），绿肥处理（种植４种绿肥作物和压青４种绿肥）。计算机模拟的方法是首先预估模型控制点，保后采用Ｌｏｇｉｓｔｉｃ方程拟合树高和胸径的生长过程，用净现值（ＮＰＶ）和内部收益率（ＩＲＲ）做为评价优化模式的评价指标。分析结果表明，在覆土厚度３０ｃｍ的基础上，每穴施磷肥基肥０．５ｋｇ，栽后灌一次透水，在行间连年间种田菁或者压紫穗槐作为绿肥．此为一级模式，该模式可获得最大的经济效益，内部收益率（ＩＲＲ）可达１８％以上。如果以改善生态环境为主要目标，增加投入，追求更高的人工林产量，则最优组合恰好是各单项试验中最优者的组合。
The fly ash discharged from the power plant was used to fill the coal mine subsidence area. The surface was covered with 30cm of soil and transformed into “artificial soil”. In 1990, Populus × euramericanacv.’Neva ’plantation was constructed. Soil management measures include soil thickness treatment (4 treatments of 0, 30, 55 cm and lime soil), fertilization treatment (16 treatments in orthogonal design), green manure treatment (4 kinds of green manure crop and 4 green manure compressing) . The method of computer simulation is to predict the model control points first, then use the Logistic equation to fit the growth of tree height and DBH, and use NPV and IRR as evaluation indexes to evaluate the optimization model. The analysis results showed that on the basis of 30cm of soil cover, each hole applied 0.5kg base fertilizer of P fertilizer, which was permeable to water once transplanting, and was planted as green manure or Amorpha fruticosa in successive years. This is a Tier 1 model, which provides maximum economic benefits with an IRR of over 18%. If the main objective of improving the ecological environment, increase investment, the pursuit of higher plantation yield, the optimal combination is exactly the best combination of individual tests.