"The directions of work conducted at the Fossil Fuels Institute on underground gasification were determined both by an analysis of the essence of these processes and by practical aims and corresponded to the scientific profile of the Institute. The main directions of work at FFI on the problem of underground gasification are at present as follows: a) Theoretical and experimental development of the basis of technological control over the processes of underground gasification of fuels. This direction covers a very broad circle of problems associated with studies of the preparation of fossil fuels for underground gasification, of their gasification, of the movement of blast and gas in the seam, and so on. b) Theoretical and experimental development of obtaining by UCG technological gases suitable for chemical synthesis, and also of methods of purifying these gases and converting them into chemical products. This direction to covers a large number of questions associated with study of the UCG process with a steam-oxygen blast, the conversion reaction, sorption processes, lust removal, etc."