峰峰矿区煤矸石淋滤与水环境污染分析

Gangue Leaching and Water Environment Pollution Analysis in Fengfeng Mining Area

峰峰矿区煤矸石堆存量与占地面积呈现出逐年增加的趋势,给矿区的水环境造成了污染。采用煤矸石淋滤试验,在矿区6个主要开采煤矿选择了6组煤矸石样品,对其中的有毒有害成分,进行了连续8d的动态淋滤试验。试验结果显示,各样品在淋滤过程中,其浓度高峰一般在淋滤初期的1-3d,第8d达到相对低值。研究发现,煤矸石淋滤液中的pH值均小于地表水和地下水,有利于煤矸石中有毒有害成分的析出;煤矸石淋滤液中的NOx和F-是引起矿区附近地下水和地表水污染的主要原因。该结果为矿区水环境污染情况提供了理论依据,同时也提出了相应的防治措施。

The gangue dump stock and floor space have a trend of increase with years,and caused the mining area water environment pollution.6 sets of gangue samples have sampled from 6 main production coalmines in mining area carried out 8 days dynamic leaching tests to check injurious ingredients within.The result has demonstrated that during the leaching,peak concentration is usually within first 3 days,the 8th day arrives at relatively lowest concentration.The study has found,pH values in the gangue leachate are all less than in surface water and groundwater,thus in favor of injurious ingredients separate out from gangue;NOx and F in gangue leachate are major causation to pollute nearby groundwater and surface water.The result has provided theoretical basis of water environment pollution situation in mining area and put forward corresponding controlling measures.