The authors hold that they are the main factors for the formation and concentration of gas, point out that the studying of layer slip structure in a high gaseous mine is not only the main task of geologists, but also the only way of forecasting coal and gas outburst.

Locating the distribution of coalbed methane enriched area using seismic P-wave data;

This paper introduces the factors of metamorphic evolution of coal-bed,expounds the time and quantity of hydrocarbon generating in coal-bed,and probes into the general regularity of the gas aggregation in coal-bed.