presplitting blasting meaning in Chinese

预裂爆破

Practice of using deep - hole presplitting blasting technology to drainage methane from extremely - thick coal seam with low permeability
深孔预裂爆破强化抽放低透气性特厚煤层瓦斯的实践
On the basis of the blasting and excavation and the shotcreting and rock bolting process of a large high slope engineering , the vibration transmission laws in the presplitting blasting , the rock caving blasing and the high slope blasting where the vibration is magnified are analyzed and compared . the effect of the blasting on the slope rock mass and the quality of supporting system construction are evaluated . on this basis , the construction quality control measures are worked out
以某大型高边坡工程的爆破开挖与锚喷支护过程为基础，分析比较了预裂、崩岩爆破与坡高放大的震动传播规律，评价了爆破对边坡岩体及支护系统施工质量的影响，据此提出了施工质量的控制措施。