tunnel excavation blasting

基本解释

Combining with JiuhuashanTunnel Project, influence of blasting in tunnel excavation on ancient wall is calculated and analyzed.
计算分析了南京九华山隧道工程开挖爆破对明古城墙的影响。
This study will play an important role in guiding the excavation blasting construction of the tunnel project and assuring the safety of ground buildings.
其研究对指导隧道工程开挖爆破施工和保证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，井下平巷的掘进开挖爆破仍存在投入大、爆破结果欠理想等问题。