不同风化程度对煤矸石盐分与pH值的影响

为揭示矸石初期物理崩解风化过程中盐分和pH值的动态变化规律,测定了山西平朔露天矿区32处暴露地表人工破碎新鲜矸石、自然风化5年、14年左右矸石,自燃矸石盐分和pH值以及新鲜矸石在强度浸泡下盐分和pH的变化。结果表明:同一粒径矸石含盐量随风化时间的延长而升高。表层积盐作用不明显,pH值先降低后升高,属于中性偏碱范围;自燃过的矸石风化物的全盐量高于盐渍化土的下限,pH呈酸性;不同粒径的新鲜矸石的全盐量和pH值随浸泡时间的延长有升高的趋势,但随粒径的减小全盐量和pH值分别呈升高和降低的趋势。

Effects of Weathering Degree on the Total Salt and pH of Weathering Coal Waste Rock

In order to reveal the dynamic changing rule of salinity and pH value in the process of physical decomposing and weathering,coal waste rock's total salt and pH in different weathering degree were tested.The result clearly indi-cate: The same grain size waste's total salt increased with weathering time increasing.The surface cumulative effective-ness of salt was not obvious.the pH of which first decreased then increased,belonging to neuter by alkalinity;The to-tal salt of weathering materials that after ignition increased to salinized soil,the pH of which is acid.The total salt and pH of different grain size fresh coal waste rock showed trend of increasing with soak time increasing,butdisplayed both increasing and declining tendency respectively with grain size declining.