The numerical simulation of gas flow in the coal seam and its application to the coal wall;

The law pf gas flowing in the coal seam is studied.

According to the characteristics of the gas flow rule of high-technique gob in the high gas concentration coal seam,the gas drainage under section technology is safely and reasonably applied.

Grey forecasting method for the gas flow prediction from boreholes;

Therefore the study on the change and trend of gas flow has significant practical value.

Study on the principle of gas seepage in the wall of drainage roadway;

Mining Field Pressure and Coalbed Gas Seepage Solid-Gas Coupled Study in the Condition of Composite Key Stratum

What’s more, based on the theory of the nonlinear gas seepage and geophysical field effect gas flow, how the HPWJ affects the law of the gas seepage is shown.

We study methane backward flow in the laneways at various wind velocities and angles based on computational fluid dynamics theory;analyze the backward flow area length,the concentration distribution and the methane roof layer thickness.