韩城矿区矿山固体废弃物淋滤试验研究

以矿山固体废弃物为研究对象，利用自主研制的淋滤仪器，模拟自然降雨对矿山废石的淋滤过程，探索污染元素及其淋滤规律。试验结果表明：①不同试验条件下的淋滤液电导率k变化趋势相同，k—t曲线整体呈下降趋势；②对于pH值，新鲜和风化废石有明显不同的淋滤规律；③不同试验条件下的淋滤液浓度c变化趋势相同，c—t曲线整体均呈下降趋势；④相同风化程度下，降雨强度越大，淋滤液k越小，c越小，pH值变化不明显；⑤相同降雨强度下，风化程度越高，淋滤液k越大，c越大，pH值越低；⑥综合来看，风化程度对于淋滤液的k、pH值、c等的影响均大于降雨强度的影响。

Leaching Test and Study of Mine Solid Wastes in Hancheng Mining Area

In this paper, the leaching process of the mine rock wastes by natural rainfall was simulated by taking the mine solid wastes as the research object and using the self-developed leaching instrument, and the pollution elements and their leaching rules were explored. The test results showed:① The electric conductivityk of the leachate has the same change trend under different test conditions, the k-t curves are trending down; ②The pH value of the leachate indicates that the fresh and weathered waste rock have obvious different leaching rules; ③ Under different conditions, the S concentration c of the leachate shows the similar change trend, the c-t curve presents the downward trend; ④Under the same weathering degree, the greater the rainfall intensity, the smaller the electric conductivity k of the leachate, the smaller the S concentration c of the leachate c, and the change of pH value is not obvious; ⑤Under the same rainfall intensity, the greater the weathering degree, the greater the electric conductivity k of the leachate, the larger the S concentration c of the leachate, and the lower the pH value; ⑥ Taken together, the weathering degree has greater impact than the rainfall intensity on k, pH value and c of the leachate.