一、煤炭地下气化工艺客观上需要,技术上可行,经济上有利,有可能成为一种崭新的采煤工艺。早在1979年联合国召开的“世界煤炭远景会议”就已明确指出,发展煤炭地下气化是目前世界煤炭回采方面的研究方向之一。各国为根本解决煤炭回采方面存在的一系列技术和环保问题,正在试验和探索一些崭新的采煤工艺,其中主要的一项就是地下气化。煤炭地下气化工艺客观上需要,技术上可行,经济上有益,还有其他方面的优越性,因而世界上许多国家都已经、正在或计划进行煤炭 First, the underground coal gasification process needs objectively, technically feasible and economically favorable, and may become a brand new coal mining technology. As early as 1979, the United Nations held the “World Coal Prospect Conference” has made it clear that the development of underground coal gasification is currently one of the world’s coal mining research. In order to fundamentally solve a series of technical and environmental problems in coal mining, all countries are experimenting and exploring some new coal mining technologies. The main one is the underground gasification. The underground coal gasification process is objectively needed, technically feasible, economically beneficial and has other advantages, so many countries in the world have, are or are planning to carry out coal