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DEMOLISHING A GROUP OF BUILDINGS WITH EIGHTSTOREY FRAME USING CONTROLLED BLASTING METHOD

Zhu Zhenhai Du Weihua Zhang Jian(Zhongren Blasting Engineering Company of Guangdong,Guangzhou 510620)  
In this paper,the selection of drilling and charging parameters and the blasting plans in demolishing three buildings with a eightstorey frame of Xinguang Milk Company in Shenzhen City using the controlled blasting method is briefly introducedAs the buildings demolished are near a transformer,Shixia Middle School,Zhongfu Primary School,streets and other living buildings and the area of buildings demolished is more than 20000m2,controlling the vibration of blasting and collapsing and the flying stone is very importantThe authors try to reduce effectively the vibration of blasting and the collapsing using the skill of delay ignition in the hole and out of the holeThe method and the skill demolishing the highstorey frame buildings using controlled blasting and the protection method to control the flying stone due to blasting
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