我国煤矿每年要排出22亿m~3矿井水,而利用率只有22％,其原因:一是因大部分矿井水中混有煤尘、岩尘等杂物,致使矿井水中的悬浮物超标;这部分矿井水不处理无法直接利用,外排后,还造成对周围水域环境的污染;二是一般中型以上的矿井每天需排出数千立方米的矿井水,若建一个相应规模的水 China’s coal mines discharge 2.2 billion m ~ 3 of mine water each year, while the utilization rate is only 22%. The reasons are as follows: First, most coal mine water mixed with coal dust, rock dust and other debris, resulting in mine water suspended matter exceeded; Some of the mine water can not be used directly, after the row, but also cause pollution of the surrounding water environment; Second, the general medium-sized mines need to discharge thousands of cubic meters of mine water daily, if the construction of a corresponding size of water