ABSTRACT
China is one of the world’s richest countries in coal resources. However, it is also the one with the most complex mining conditions among the world major coal-production countries. 92% of the coal yield in China comes from underground mining. In recent years, along with the increasing mining depth, the mining difficulty and risk have continuously increased. In the mining operation process, the heading roadway firstly reveals the coal bed and destroys the occurrence environment, which further results in the emission of numerous gases. Because of this, gas accidents can easily occur.
