There should be a large proportion of good two-shotholes, two or three drive-and-pitch holes, and at least four one-shotholes.
在设置球洞时,应该设置大量的两击球洞、两到三个包含木杆击球和劈杆击球的球洞、和至少四个一击球洞。
3
Improve stemming quality. By stemming the shotholes with machine-processed stem-soil, the explosive energy utilization ratio rises and 10% explosive are saved.