In order to provide scientific basis for prevention and control of gas disasters, through analysis of geological tectonic evolution and tectonic control, a certain coal mine in Shanxi No. 9 + 10 coal seam gas geology rule was studied, the gas concentration distribution was forecasted, the results showed that with the increase of mining depth, the change of geological tectonic environment and the increase of coal mining mechanization degree, also increased along with the change and even the gas emission. So,  it was necessary to strengthen the administration of the ventilation in the future to prevent the local gas accumulation and guarantee the mine safety production.