Abstract:

As the Jiaojia gold mine depth constantly moving，rock hardness coefficient becomes larger，traditional  emulsion oil explosives tie angle column type cut slot or five angle plum hollow cut slot technology blasting efficiency low，has not meet efficient production situation.In this paper，we have introduced granular emulsion ammonium fried drug and large diameter center empty eye spiral cut slot technology.Not only improve the single loop operating footage，but also due to the relatively small number of toxic and harmful gases produced by blasting technology at the same time，to shorten the duration of ventilation and to speed up the operating cycle，so that this technique greatly enhanced the heading face footage and accelerated the speed of development works.

Key words: Blasting technology, Optimization granular emulsion ammonium explosive, Spiral cut, Jiaojia gold mine, Shandong province