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.