It showed that eccentric pressure is produced by eccentric decouple charge blasting on borehole wall.
实验结果表明，偏心不耦合装药在孔壁上形成明显的偏心应力场。
2
The complex slotted cartridge is put forward on the basis of previous research, namely, a slotted pipe is added between slotted charge and borehole, using water as medium.
在前人的基础上提出了复合型切缝药包，即是在切缝药包和炮孔壁之间再加一个切缝管，用水做耦合介质。
3
Mechanism of smooth borehole wall protection blasting and calculation method of the charge are analyzed in this paper.