Discussion on some problems on building the ventilation system for metal and nonmetal small mines in Yunnan province

Mine ventilation system is one of the eight systems of underground mining in metal and nonmetal mines, the set up and reliable operation of ventilation system play very important roles in underground mining. As an important area in mining industry in China, with abundant mining resources, Yunnan Province has many mining companies,of which are small scale mines. And those small mines have not yet come to realize the importance to set up ventilation system. The paper brings up several ways to the set up of small mines ventilation system in accordance with some problems that they face, in order to guarantee safe and stable underground mining for those small mines.