Abstract: Through theoretical analysis and the trial of imitation tectonic coal which is made of certain fragmentation degrees of non-tectonic coal, the thesis studies on the Initial Released Gas Expansion Energy Property of Imitation Tectonic Coal and discusses the possibility of taking the place of tectonic coal with imitation tectonic coal. The result of lab test proves that gas pressure, gas released volume and expansion energy of initial released gas of both tectonic coal and imitation tectonic coal all keep consistent with negative exponent curve. They stand still 1 000 ms later while cumulative volume of released gas is increasing continuously, and decay rate of expansion energy in the super critical state is smaller than that in the subcritical state. At the same time there is an inflection point at critical pressure. Expansion energy of initial released gas of imitation tectonic coal which has the same fragmentation degree as tectonic coal is equal to that of tectonic coal approximately. It is very significant to solve the problem of making wrong determination using non-tectonic coal instead of tectonic coal in coal and gas outburst identification, which caused by the difficulty of collecting tectonic coal.

Key words: expansion energy of initial released gas, imitation tectonic coal, outburst