Abstract: In order to study the gas occurrence law of coal seams under ultra-deep and high ground stress conditions and obtain effective measures to resolve gas disasters in the field, the field test and data fitting are used to study the geological laws of coal seam gas.Using the cell division method, the gas emission law of the working face is studied.The results show that the special sealing technology with closed double loosening ring with pressure grouting can accurately measure the gas pressure of coal seams.The coal seam gas pressure and content increase with an increment of the burial depth, and the growth gradients are 0.06 MPa/100 m and 0.13 m³/t/100 m, respectively.The method of using the upper corner buried pipe+drainage pump can effectively reduce the gas concentration at the upper corner, solve the problem of gas accumulation at the corner, and ensure safe production.This research has important guiding significance for solving the corner gas overrun problem on the site.