tunnel excavation blasting

基本解釋

Combining with JiuhuashanTunnel Project, influence of blasting in tunnel excavation on ancient wall is calculated and analyzed.
計(jì)算分析了南京九華山隧道工程開挖爆破對明古城墻的影響。
This study will play an important role in guiding the excavation blasting construction of the tunnel project and assuring the safety of ground buildings.
其研究對指導(dǎo)隧道工程開挖爆破施工和保證地面建筑物安全起到了重要作用。
Because of the weak borehole sealing and inadequate use of the initial free face, the higher investment and unsatisfactory blasting effect still exist in the mine tunnel excavation blasting.
由于炮孔堵塞不牢和初始自由面利用不充分，井下平巷的掘進(jìn)開挖爆破仍存在投入大、爆破結(jié)果欠理想等問題。