Gas Control Technology of Single Instability and Low Permeability Coal Seam

According to the characteristics of attitude changes, soft, low permeability, drainage difficulty in single instability and low permeability coal seam, YMCIG not only carried out a series of scientific and technological research, such as pressure releasing technology, the three-dimensional mesh drainage and surface drilling drainage technology other than conventional extraction methods, but also promoted a series of effective management techniques, such as the evaluation mechanism of "five volume and two phase", video monitoring drilling technology, early warning technology and so on. The promotion of these technologies effectively resolved the problem of gas control in single instability and low permeability coal seam and achieved a safe and efficient production of the mine.