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煤矸石是采煤和选煤过程中一般废弃不用的低热值的炭质岩石,灰分含量很高。我国煤矿生产过程中排矸的平均比例约为原煤产量的20％,目前每年排放的矸石量近一亿吨,其中中直生产矿井的约5000～6000万吨;而历年积存量在十亿吨以上,其中中直生产矿井的矸石积存量约8亿多吨,侵占土地三万四千多亩。矸石的积聚不仅占有大量土地,而且当其自燃时放出大量有害的烟气,严重污染矿区的水质及大气环境。石煤也是一种低热值(800～2500大卡/公斤)、高灰份的劣质燃料。浙江、湖南、湖北等南方诸省由于原煤贮量的贫乏,近年来为
Coal gangue is a carbonaceous rock with low calorific value that is generally discarded during coal mining and coal preparation and has a high ash content. The average proportion of gangue discharged from coal mines in China is about 20% of that of raw coal. At present, there are nearly 100 million tons of gangue discharged each year, of which about 5000 to 60 million tons are directly produced in mines. In the past years, Of which more than 800 million tons of gangue rock accumulated in the production of straight coal mines, covering 34,000 acres of land. The accumulation of gangue not only occupies a large amount of land, but also emits a large amount of harmful fumes when it spontaneously ignites, seriously polluting the water quality of the mining area and the atmospheric environment. Stone coal is also a low-calorific value (800 ~ 2500 kcal / kg), high-ash low-grade fuel. Zhejiang, Hunan, Hubei and other southern provinces due to the lack of reserves of raw coal in recent years