It is very important to mine safe exploitation, gas drawing and predict of coal and gas outburst that adsorption characteristics of coal to gas in geophysical field are studied.

Gas seepage characteristics in coal under alternating electric field (AEF) have been studied.

Coalbed gas content of Tunliu coal field is the highest in Lu 'an coal area, from gas content and depositing condition, developing coalbed gas is very favourable.