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小孔径
相关语句
  small diameter hole
    Application of the Technique of Springing Blasting in Small Diameter Hole to the Roadbed Pitting
    小孔径扩壶爆破技术在路堑开挖中的应用
短句来源
  “小孔径”译为未确定词的双语例句
    Smooth Blasting Design of Small Holes Diameter in Ji-Tai Highway
    高速公路小孔径光面爆破设计
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  small diameter hole
This small diameter hole has 51% of the cross-sectional area of a single microchannel and is 1.6 mm long.
      
The slots are elongated S shapes, terminating in a small diameter hole, equispaced around the outer 15% of the periphery.
      


The technique of springing blasting in small diameter hole is carried out successfully in roadbed pitting.It is expounded that the technique could bring about a good project profit under proper geological condition and speed up the project schedule and in the meantime,some blasting parameters for reference are also given. [

通过小孔径扩壶爆破在路堑开挖中的实际应用 ,阐述了在一定地质条件下 ,使用该技术可显著降低土石方爆破的综合成本 ,加快施工进度 ,同时提出了可供参考的爆破参数

Taking the blasting work in Ji Tai Express as sample this paper intraduces a designing of with standing blasting with small blasting hole,which can be applied in the blasting object with steep slope and low height.

主要介绍了济泰高速公路的石方爆破工程中 ,对于那种坡度陡 ,高度不太高较适合抬炮的地方 ,实行了一种小孔径的抬炮设计。

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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