工程爆破

2009, v.15;No.55(01) 44-47

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大型多跨连体厂房爆破设计
BLASTING DESIGNMENT OF LARGE-SCALE MULTI-SPAN WORKSHOP

姚哲芳;周听清;成永华;曾赞文;
YAO Zhe-fang1,ZHOU Ting-qing1,CHENG Yong-hua2,ZENG Zan-wen1(1.University of Science & Technology of China,Hefei 230027,China;2.Guangdong Hongda Blasting Stock Co.,Guangzhou 510623,China)

摘要(Abstract):

重点介绍了4.4万m2大型多跨连体厂房采用沿纵轴定向分段倒塌(过程类似多米诺骨牌效果)的爆破设计思想。为了避免高段别的雷管延时误差大带来麻烦,利用孔内半秒差和孔外毫秒差相结合来实现分段起爆。该厂房有210根空心立柱(占总数的63.6%),无法采用常规的钻孔爆破,水压爆破问题也较多。用砂子代替水作为传压介质解决了水压爆破的立柱漏水等问题,就此我们提出了填沙爆破的新方法,实践证明效果很好。厂房按设计方案倒塌,爆破非常成功。
This article emphatically introduces a design concept of directional segment collapsing along its longitudinal axis,similar with dominoe effect,in blasting demolition of a 44000 square meter multi-span large-scale workshop.For avoiding the trouble of time delay error in ignition resulted from the use of high grade detonator,down-hole half-second delay detonator cooperated with out-hole millionsecond delay blasting was employed to realize stage ignition.The workshop has 210 hollow pillars(accounting for 63.6% of the total),which is unable to be destroyed by conventional drilling blasting.And besides,water pressure blasting also suffers its own problems for these pillars.The replacement of water with sand as the pressure transmission medium solves the problem of water leakage from the hollow pillars,which is the new blasting method proposed in this paper,named Sand-filling Blasting.Blasting practice shows a very good result,with the workshop collapsing following the designed requirements.

关键词(KeyWords): 大型多跨连体厂房;定向爆破;纵向倒塌;空心立柱;填沙爆破
Multi-span large-scale workshop;Directional blasting;Longitudinal collapse;Hollow pillar;Sand-filling blasting

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作者(Author): 姚哲芳;周听清;成永华;曾赞文;
YAO Zhe-fang1,ZHOU Ting-qing1,CHENG Yong-hua2,ZENG Zan-wen1(1.University of Science & Technology of China,Hefei 230027,China;2.Guangdong Hongda Blasting Stock Co.,Guangzhou 510623,China)

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