With the deep mining in the Yangdong Mine, the original gas power generation capacity was operating at full capacity, and there was still a large amount of gas concentration, which was harmful to the environment. Yangdong Mine expanded on the basis of the original power station, using flue gas preheating utilization technology, high and low concentration gas mixing technology, optimally selecting expansion units, improving gas utilization technology, increasing clean energy supply and reducing greenhouses. Gas emissions brought considerable economic benefits to coal mining enterprises.