Abstract: Series of scientific problems such as gas overrunning, roof flaking, roadway collapsing and so on occurred in a colliery with complex geological conditions of high gas in coal seams group with short distance, low permeability and weak surrounding rock. By using theory and practice research, the new technology of gas management and support-surrounding rocks control in fully mechanized coal face, the active support technology of surrounding rock of coal entry were put forward and studied further. The key support parameters were determined, and the field industrial test was carried out. Results showed that this set of technology has solved the key problem restricting the mine development and ensured the safe effective mining. Meanwhile, it has provided a technique support for the application and dissemination in the same complex geological conditions.

Key words: gas extraction control, diagnosis of leakage fault, mining effect, cable truss