Abstract:During the blasting excavation in open-pit mine, when the rock in the slope with developed fracture and crushed lithology, there is a serious deficiency to use presplitting blasting or smooth blasting technology to maintain the slope stability. In order to take full advantage of the cushion boreholes and cushion layer and enhance the shock absorption effect, we use the optimized cushion blasting technology when blasting near the slope. Then, there was a test on the 2nd mining field of West open-pit copper mine by using the optimized cushion blasting technology with the uncoupled charge structure. Obviously, the after optimal blasting effect is much better than the traditional way. Particularly, the vibration intensity of cushion blasting can be cut more than 25% than the normal bench blasting. Besides, the boulder yield has decreased about 20%. What’s more, there is little bedrocks and the bench slope is much more smoothing than before.