1978 年 94 巻 1085 号 p. 469-474
Being founded on the field observation of the various gas outburst phenomena which have occurred at coal mines in Hokkaido, the author emphasizes that the origin of gas outburst could be nothing but the gas energy. Then they demonstrate referring to the actual examples that any gas outburst does not happen in reality unless the four conditions or mechanisms to facilitate its occurrence are satisfied.
As a verification of his opinion, he made experiments to cause gas outburst artificially by using ice charged with high pressure carbon dioxide.