风沙区采煤沉陷土壤质量演变时效评价

Evaluation on Evolution Time Effect of Soil Quality in Mining Subsidence Ground of Windy Desert Area

利用灰色关联投影法,并结合主成分分析法和层次分析法的确定评价因素的权重,建立了风沙区采煤沉陷地土壤质量演变的时效综合评价模型,研究结果表明:塌陷一年期为土壤的主要扰动年份,物理性质呈现出"未扰动>>塌陷(3a)>塌陷(2a)>塌陷(1a)"的趋势,具备一定的修复能力,修复周期从塌陷(1a)开始;化学指标方面呈现出"未扰动>>塌陷(1a)>塌陷(2a)"的趋势,采煤沉陷对化学性质的负面影响的时长大于物理性质。该方法可以为采煤沉陷地的科学治理提供一定参考。

The relation projection method in combination with the main composition analysis method and the analytic hierarchy process was applied to determine the weighting of the evaluation factors and to establish an evolution time effect comprehensive evaluation model of the soil quality in mining subsidence ground of the windy desert area. The study results showed that the first year of the soil in the subsidence area was the main disturbance year. The physical properties would appear a tendency of ＂no disturbance 〉 collapse （3a） 〉 collapse （2a） 〉 collapse （la）＂ and the restoration period would start from collapse （ 1 a）. The chemical index would appear a tendency of ＂no disturbance 〉 collapse （ 1 a） 〉 collapse （2a） ＂. The negative effect duration of the mining subsidence to the chemical properties would be longer than the physical properties. This method could provide certain references to scientific control of the mining subsidence ground.