煤炭是世界各国的主要能源之一,而大多数用作能源的煤炭,必须在地面建立煤矿,投入大量的开拓工程,然后再从井下将煤开采、提运地面,再供应各部门生产应用。这过程中需要化巨大的投资。为了减少煤炭的开采投资,简化能源利用手续,目前国外已开始进行煤地下气化的 Coal is one of the major energy sources in all countries of the world. Most of the coal used for energy must be built on the ground and invested in a large number of exploration projects. After that, coal is mined and transported underground, and then applied to various departments for production and application. This process requires huge investments. In order to reduce coal mining investment and simplify energy use procedures, foreign countries have begun to conduct underground coal gasification.