基于土壤肥力、环境质量的充填复垦方式优选排序研究

Prioritizing sequence research of different filled reclamation modes based on soil fertility and environmental quality

立足土壤肥力、环境质量角度研究采煤塌陷区不同充填复垦方式的土壤质量差异和优选顺序,能够明晰复垦短期、长期内各种充填复垦土壤质量提升的短板所在,针对性地为复垦土地后期管护的选取和变更提供依据。以徐州市贾汪区为例,基于土柱实验和野外采样,采用模糊数学法、内梅罗指数法进行土壤肥力、环境质量评价,分别立足土壤肥力和重金属污染的角度对不同充填复垦方式进行复垦后短期、长期的优选排序研究。结果表明:基于土壤肥力质量的充填复垦方式优选排序,在复垦后短期内表现为湖泥>粉煤灰>煤矸石>建筑垃圾,长期表现为粉煤灰>煤矸石>湖泥>建筑垃圾;基于土壤环境质量的充填复垦方式优选排序,在复垦后短期内表现为湖泥>建筑垃圾=煤矸石>粉煤灰,长期表现为湖泥>建筑垃圾>煤矸石>粉煤灰。

It＇s necessary to research the prioritization sequence of different filled reclamation modes based on the soil fertility and environmental quality in the subsiding mining area. We could find the existential problems of different filled reclamation soil both in short-term and long-term to ensure selecting and changing the management task pertinently according to the research result. Taking Jiawang, Xuzhou as an example, the paper finished the soil quality evaluation and sequencing of the filled reclamation modes with the methods of soil column experiments, the field investigation and the scientific calculation. The results showed that the filled reclamation modes in the sight of soil fertility were sorted as silt〉 fly ash〉 gangue〉 construction rubbish （short-term） and fly ash〉 gangue〉 silt〉 construction rubbish （long-term）, and that in the sight of soil environmental quality were sorted as silt〉 construction rubbish= gangue〉 fly ash （short-term） and silt〉 construction rubbish〉 gangue〉 fly ash （long-term）.