Abstract: in order to achieve safe and efficient mine closure,wolong lake coal mine learned from the previous experience of shutting off the productive mine,innovated a new mode of safe and efficient shut-in and implemented the technology of gas extraction and utilization.The mine pit after shut-in,keep the underground ventilation,drainage,gas drainage and the operation of the gas power plant,gas drainage feature vector to generate power,realizes the self-provided power plant capacity and the underground ventilation,drainage,gas drainage,power consumption self-sufficiency,green recycling and sustainable development in the future according to capacity policy situation,for the remainder of wolong lake coal mine exploitation of coal resources.It has outstanding advantages in equipment disposal,gas management,resource reserve,late mining and personnel placement.It is technically feasible,economically reasonable and has controllable safety risks.It is conducive to comprehensive utilization of resources and coal resource reserve and will produce significant economic and social benefits.

Key words: Green cycle, Shut down the well without closing the pit, Gas extraction, Use, practice