Development of Environmental Reclamation Method by Using Biomass Fuel at Open-pit Coal Mine

地化特征和AMD总反应表面积的增加。对含硫化物岩石的地球化学性质变化的研究表明，废石排土场10年的氧化过程比2年的氧化过程提前。矿物学研究结果表明，受气候条件和硫化物氧化酸化作用的影响，排土区周围地表风化容易加速。此外，研究表明，排土场在风化过程后形成粘土矿物，这表明AMD的产生将被最小化，因为废石场内部提供了氧气和水的屏障。此外，还应考虑一些额外的对策，如废石的倾倒方法、低渗透层的应用等。

Geochemical characteristics and the increase in the total reactive surface area of the AMD. The study of the changes of geochemical characteristics of sulphide-bearing rocks showed that the oxidation process in waste rock dump in 10 years was more advanced than that of 2 years. As the results of mineralogical investigation, the weathering is easy to accelerate around the surface of dumping area due to climatic conditions and acidification by oxidation of sulphides. Moreover, the study showed that the formation of clay minerals after the weathering processes took place at the dumping area, suggested that the generation of AMD would be minimized because the interior of the waste rock dump provided a barrier to oxygen and water. Moreover, some additional countermeasures should be taken into consideration at the same time such as the dumping method of waste rock and application of low-permeable layer.