姚文生
YAO Wen-sheng(China Nuclear Industry 22nd Construction Corporation,Yichang,Hubei 443000,China)

• 1:中国核工业第二二建设公司 湖北宜昌443000

摘要(Abstract)：

浙江三门核电平基工程中采用深孔台阶爆破进行土石方开挖,对底板的平整度和完整性有很高的要求,超挖不得超过20cm,不容许欠挖。为此,根据可爆性对开挖区内的岩石进行分级,分别采用不同的钻爆参数,同时采取了预留保护层爆破、无超深爆破、底部空气间隔装药等技术措施,确保了底板的开挖质量。
In the base-leveling project of Sanmen nuclear power plant in Zhejiang,deep-hole bench blasting was used for rock excavation.The higher evenness and perfection of the base are in demand,with an overbreak of less than 20cm and no underbreak.For these reasons,rocks in blasting area are classified according to their blastability and different drilling-and-blasting parameters are used.At the same time,some technological measures such as protective layer remained in advance,no-subdrilling and air-deck charging at hole bottom are used to ensure the quality of excavated base.

关键词(KeyWords)： 深孔台阶爆破;岩石开挖;保护层;空气间隔装药
Deep-hole bench blasting; Rock excavation; Protective layer; Air-deck charging

Abstract:

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基金项目(Foundation):

作者(Author): 姚文生
YAO Wen-sheng(China Nuclear Industry 22nd Construction Corporation,Yichang,Hubei 443000,China)

参考文献(References)：

• 〔1〕刘殿中 工程爆破实用手册[M] 北京:冶金工业出版社,1999
• 〔2〕赵维清 三门核电场平爆破设计说明书[Z] 湖北宜昌:中国核工业第二二建设公司,2002
• 〔3〕史雅语 石方开挖深孔控制爆破[A] 工程爆破文集(第六辑)[C].深圳:海天出版社,1997,468-475