Abstract
At present, the cumulative coal gangue piles up about 4.5 billion tons and annual discharge capacity reaches 300 million tons in China. Emissions of coal gangue wastes national resources and will take up a lot of land. Besides, the ecological environment will be polluted and damaged. Using coal gangue as roadbed filling material can not only solve the difficulty of land expropriation, but also consume a large amount of accumulated coal gangue, which has huge economic and environmental benefits. Through laboratory soak test and leaching test, this paper analyses the inorganic salt content and heavy metals of coal gangue used in Xing Fen expressway. Groundwater in Xing Fen highway was captured, detected, evaluated and its quality was good or excellent. In this project, the effects of coal gangue on groundwater meet the regulatory requirements and coal gangue as a new filler can be applied to coastal highway roadbed.
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