我国煤炭资源丰富,开采历史悠久。早在战国时代(公元前475～221年),劳动人民就开始使用煤炭;西汉时期(公元一世纪)开采已具一定规模,并用煤来冶铁。建国以后,做了大量的煤田地质勘探工作,并进行了大规模的开发。目前,全国累计探明的煤炭储量已达6400亿吨,原煤年产量超过 China is rich in coal resources, mining has a long history. As early as the Warring States Period (475-221 BC), working people began to use coal. During the Western Han Dynasty (the first century AD), mining had reached a certain scale and coal was used to iron. After the founding of the PRC, a large number of coalfield geological exploration work has been done and a large-scale development has been carried out. At present, the country has cumulatively proved reserves of 6400 tons of coal, annual output of raw coal exceeded