日本煤炭科研重点已转向开发洁净煤技术。其原因是:①日本煤炭生产急剧萎缩,到1993年底,年产50万t以上的煤矿仅余5个,全国煤炭总产量为700万t左右,不足国内煤炭需求量的6％,而进口煤则占94％以上,故煤炭生产研究已居次要地位。②日本煤炭用量逐年增加,到2000年,火力发电将以煤炭 The focus of Japan’s coal research has shifted to the development of clean coal technologies. The reasons are: 1) Japan’s coal production has shrunk sharply. By the end of 1993, there were only 5 coal mines with an annual output of more than 500,000 tons, and the national total coal output was about 7 million tons, which is less than 6% of domestic coal demand, while imported coal It accounted for more than 94%, so coal production research has assumed a secondary status. 2 The coal consumption in Japan increases year by year. By the year 2000, thermal power generation will use coal.