煤矸石充填复垦采煤塌陷区可行性分析

煤矸石充填塌陷区后是否产生重金属污染是目前充填复垦中亟需解决的关键问题。为分析煤矸石充填复垦塌陷区的可行性，以徐庄煤矿煤矸石为例，通过现场采样和实验室实验的方法分析砷（As）、镉（Cd）、铬（Cr）、汞（Hg）和铅（Pb）重金属对复垦环境的影响。实验结果表明:煤矸石重金属含量很低、性质稳定；在淋溶和浸泡状态下，煤矸石中重金属的水溶性和淋溶性较差，降雨对煤矸石的淋溶作用不会造成重金属污染；煤矸石周边土壤重金属含量符合国家相关标准。研究表明煤矸石充填复垦塌陷区是可行的。

Feasibility analysis of coal gangue filling and reclamation in mining subsidence area

Analysis of heavy metal contamination caused by coal mine gangue is urgently needed in reclamation of coal mine gangue to coal mining collapse areas.In order to analyze feasibility of filling and reclamation collapse areas with coal mine gangue，taking gangue of Xuzhuang Coal Mine as example.Based on field sampling on coal mine gangue and surrounding soil，and measurement of As，Cd，Cr，Hg，and Pb for samples in the lab.The results showed that the heavy metal content of the coal mine gangue was very low and stable.Under the experiments of leaching and soaking，the water solubility and leachability of the heavy metal of coal mine gangue were poor.Thus，the leaching of rain on mine coal gangue can′t cause heavy metal contamination.The heavy metal content in the soil around the mine coal gangue less than the national standards.Based on experiments and analysis，it can conclude that it was feasible to fill the reclaimed land with mine coal gangue，and it will not cause heavy metal contamination to the surroundings.