Under the condition of pulsed ventilation, the physical process of gas transport in the upper corner of mining face is analyzed, and the dynamic model of gas transport is set up.

Study on the distributing rule of gas emission in working face;

Evolvement rules of the roof control and crack field in working face;

Different-source gas emission prediction model of working face based on BP artificial neural network and its application;

In order to resolve the difficult problem to calculate the temperature of rock surrounding coal face andheat transfer between air and wall rock,the authors analyzed the heat conduction differential equation in movingcoordinate,resolved the equation by finite element method,set up the computer program with FORTRAN languageand calculated a actual coal face.

According to the characteristic of moving boundary of coal face , the authors set up the heat conduction differential equation and studied the dimensionless form of the equation.

Research on application of downward ventilation to coal mining face in horizontal seam with coal outburst in potential;

Gas drainage trial in coal mining face of Pinghu Mine;

Technology on retaining roadway on original site in goaf after coal mining face crossing rise is put forward.

Accident reason and prevention of the partial foof falling at actual mining face;

Study on the length of the actual mining face in Huainan mine area;

Approach on the selection of the reasonable length of the actual mining face;

Selecting the sealing position for stope face after mining;