Working Face Pre-splitting Blasting Depth Analysis During Primary Mining

In the process of coal mining, the larger roof suspension at working face has always restricted the smooth progress of the stoping during the primary mining, so it has important significance to carry out deep-hole pre-splitting blasting. Based on the conventional empirical methods and combined with the key layer theoretical knowledge, the paper analyzes the deep hole blasting's hole depth, which provides a theoretical basis for the deep hole blasting.