Taking blind alley gas as the main research object, this paper expounds the distribution laws of blind alley gas, and probes into the methods for the gas emission and some matters needing attention.

A detailed discussion on gas distribution law and split flow feature in the gas gateway was made when a gas gateway of a fully mechanized caving face used to solve to the gas content highly over the limitation.

Application of gas tail roadway in high-grade general mining face;

According to the theory of filtration flow and ventilation network,numerical simulation on three zones distribution in goaf was made under the condition of without gas discharge laneway,one gas discharge laneway and two gas discharge laneways,as well as when the position of discharge laneway varies.