Discussion on requirements of gasifier gas tightness for underground coal gasification production

Underground coal gasification (UCG) technology is an innovative coal in-situ chemical combustion mining method. Affected by complex geological conditions and poor controllability, UCG has not yet realized large-scale industrial application. The gas tightness control of UCG is an important factor to ensure its safe production, but there are deficiencies in its research at this stage. In the process of UCG, complex physical and chemical changes...