At present, most of the technologies used for gas power generation in our country are gas turbines, internal combustion engines, and oxidation power generation. The concentration of gas associated with each coal mine varies, some coal mine gas concentration will be relatively high, even more than 30%, and some will be less than 1%. For high concentration gas, its mining method is through high intensity negative pressure extraction, or by drilling Wells on the surface. But through the coal mine ventilation system, or different negative pressure extraction, most of the concentration is relatively low. In addition, gas turbines and high-precision internal combustion engines are used in high-concentration gas power generation technology, low-precision internal combustion engines are used in low-concentration gas power generation, and gas power generation with too low concentration is generated by mixing high-concentration gas and then heating it in catalytic oxidation equipment