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小孔径浅孔
相关语句
  small hole drilling and shallow
     Small hole drilling and shallow blasting to guarantee excavation accuracy
     用小孔径浅孔爆破保证开挖精度
短句来源
  “小孔径浅孔”译为未确定词的双语例句
     Small hole diameter, shallow hole and short delay blasting are adopted in the blasting construction of closed-packed cutting hole piles.
     采用跳三隔一紧贴的开挖爆破顺序,小孔径,浅孔微差控制爆破进行密排挖孔桩的爆破施工。
  相似匹配句对
     Small hole drilling and shallow blasting to guarantee excavation accuracy
     用爆破保证开挖精度
短句来源
     RESEARCH AND DEVELOPMENT OF MICROCOMPUTER CONTROL SYSTEM OF SMALL TILTEDHOLE DR ILLING MACHINE
     钻床微机控制系统研究与开发
短句来源
     Measurement System of Thin Wall Thickness and Apertures of Two Adjacent Holes
     薄壁厚和测量系统
短句来源
     Deep Hole Explosion of Small Diameter in Limestone Minning
     爆破在石灰石矿山开采中的应用
短句来源
     CALCULATION AND ANALYSIS OF OPERATING STABILITY OF WATER GATE WITH A SMALL DIAMETER SLUICE
     水闸运行稳定计算分析
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For the reason of small amount of detonating powder, the small hole and shallow blasting brings about small vibration and impact to the side slope, favouring to the stability and safety of the side slope and imposing slight influence on the surface of foundation rock. It is easy to control excessive or deficient excavation with required accuracy. Therefore, it was well used in the shaping excavation of high vertical sideslope and the excavation of bottom protection layer during the stage Ⅱ work of permanent...

For the reason of small amount of detonating powder, the small hole and shallow blasting brings about small vibration and impact to the side slope, favouring to the stability and safety of the side slope and imposing slight influence on the surface of foundation rock. It is easy to control excessive or deficient excavation with required accuracy. Therefore, it was well used in the shaping excavation of high vertical sideslope and the excavation of bottom protection layer during the stage Ⅱ work of permanent shiplock. After the air supply system for handdrill was changed from using low pressure to middle pressure, the dust emission efficiency of the handdrill was upgraded, the probability of drill jamming was reduced, thus, the drilling velocity was further increased and satisfactory results were obtained.

小孔径浅孔爆破的起爆药量小 ,爆破对周边的振动与冲击较小 ,有利于边坡的稳定与安全 ,对建基面的爆破影响很小 ,且容易控制超、欠开挖量 ,保证开挖精度 ,在永久船闸二期工程的高直立边坡的成形开挖、底部保护层开挖中得到很好的运用。将手风钻的供风系统由低压供风改为中压供风后 ,提高了钻机吹尘效率 ,减少卡钻的机率 ,进一步提高了钻孔速度 ,取得了较好的效果

 
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