复杂环境下钢筋混凝土基础爆破拆除实践

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复杂环境下钢筋混凝土基础爆破拆除实践
范作鹏12,黄治成',刘高
(1.中南大学资源与安全工程学院,湖南长沙410083;2.山东黄金股份有限公司新城金矿,山东莱州261438)
摘要:针对复杂环境下钢筋混凝土基础爆破拆除的特点,制定了多段毫秒微差爆破方案,介了爆破拆除的设计和施工。根据每次爆破规模计算了爆破震动、爆破飞石和爆破冲击波安全距离,对爆区环境中不具备足够安全距离的采取相应的安全防护措施。
利用Blastmare爆破震动仪监测数据进行线性回归,修正了爆破震动安全允许距离计算公式。
关键词:爆破拆除;毫秒微差;安全防护
中图分类号:TD235.37 文献标识码:A 文章编号:0253-6099(2010)05-0009-03
Practice of Blasting Demolition of Reinforced Concrete Foundation
under Complex Environment
FAN Zuo-peng12,HUANG Zhi-cheng',LIU Gao
2.Xincheng Gold Mine,Shandong Gold,Laizhou 261438,ShanDong,China)(1. School of Resouroes and Safety Engineering,Central South Uninersity,Changsha 410083,Hunan,China;
Abstract:Considering the features of demolition blasting of reinforced concrete foundation under complex environment,
multistage millisecond short delay blasting scheme was prepared.The design and construction of blasting demolition was
introduced in details.The safety distancc for blasting vibration,blasting flyrock and blasting shock wave was calculated
according to each blasting scale. And it is suggested that some appropriate safety precautions shall be taken for the blas-ting environment within the range of unsafe distance. By linear regression with blasting vibration data monitored with
Blastmare,the formula for minimum safe distance of blasting vibration is modified.
Key words: blasting demolition;millisecond short delay;safety precaution
新城金矿选矿车间扩能改造,需要拆除车间内原 1号球磨机组
有的2号球磨机基础。基础均为钢筋混凝土结构,为在规定时间内完成拆除任务,选择爆破方式进行拆除。
基础分为I、I两部分,深度均为4.7m。第I部分平 9
面尺寸为1mx2.4m,第II部分平面尺寸为0.8mx 过 2号球磨
1.7m、1.4mx1.3m.1.5mx1.5m和1.7mx1m, 机基础 2 减震浮
道选
基础内铺有直径12mm、间距250mm的竖筋,总拆除设
基础为50.38㎡。爆破基础边界距东、西、南和北面备
需保护机器设备的最近距离分别为7,5.5,5.8和8.9
m,爆破中心距离房顶15m。爆区环境如图1所