super deep part, empty without explosive with air interval device, the explosion pressure in hole can be reduced, the explosive conducting time prolonged, blast quality raise and consumption lowered.

To solve the problem in driving of a drift with peripheral hole smooth blasting,the air-deck charge in peripheral hole smooth blasting and its improvement on the detonation mode have been applied,and better blasting effect has been obtained,The practical application has proved that the technique is simple in operation,low cost in blasting,very profitable and valuable in extended application.

A new blast technology, air-deck charge using peremeter hole smooth blasting, has been introduced in this paper.

The behavior of air shock absorber under various air pressure and vibrating frequence was researched, and the structural characteristics of air shock absorber was also discussed.

In view of some problems such as high detonator consumption,high ore cost and faulty blasting effect in the course of many open pits producing,taking Nanfeng Open-pit Mine as research object,the experiment of gas interval implement in middle deep hole dry bore is applied and the experiment of gas interval implement in middle deep hole water bore are carried out by improving loading structure.