Research and Application of Integrated Presplitting Blasting in Nonpillar Mining Technology

Figure 3

(a) Plan view of the integrated presplitting blasting technology design. The shallow hole blasting before the working face support is to fragmented regional roof, and the roof-cutting blasting on the side of the road is to cut off the roof of the roadway and goaf. (b) Three-dimensional view of the integrated presplitting blasting technology design, which allows for a more intuitive display of design ideas.

(a)

(b)