Abstract: According to the high risk area appearing in the process of underground ming turn to open-pit mining,under the condition of the caving method cannot be implemented security, the tie holes wing propulsion is used to deal with the gob, the purpose of safe and reliable is received. Taking the 1310 gob as an example, the implementation process of the tie hole controlled blasting is described in detail. It provides a new train of thought for the process method of gob, and has a high value on the future work in the field.

Key words: Underground to open, Tie deep controlled blasting in the hole, Wing propulsion, Gob