钢筋砼烟囱拆除爆破切口高度优选及效果分析  

Optimization of cutting height and effect analysis of reinforced concrete chimney demolition blasting

作　　者：叶海旺[1,2] 吴家鹏 郑长青 许松 傅建秋 罗伟涛 YE Hai-wang;WU Jia-peng;ZHENG Chang-qing;XU Song;FU Jian-qiu;LUO Wei-tao(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Province Key Laboratory of Processing of Mineral Resources and Environment,Wuhan 430070,China;Zhuhai New Technology Development of Blasting Co.,Ltd.,Zhuhai 519000,Guangdong,China;Hongda Blasting Engineering Group Co.Ltd.,Guangzhou 511328,China)

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]矿物资源加工与环境湖北省重点实验室,武汉430070 [3]珠海爆破新技术开发有限公司,广东珠海519000 [4]宏大爆破工程集团有限责任公司,广州511328

出　　处：《工程爆破》2023年第3期117-122,共6页Engineering Blasting

基　　金：国家重点研发计划基金资助项目(2020YFC1909602)。

摘　　要：为进一步研究复杂环境下垃圾焚烧厂100 m钢筋砼烟囱的最佳爆破切口高度,采用有限元软件ANSYS/LS-DYNA分别对爆破切口高度为1.5、2.0和2.5 m 3种工况进行数值模拟,对比分析烟囱爆破倒塌姿态与最大水平位移,结合该烟囱自身结构与现场环境,采用上半部57 m拆除爆破、下半部43m机械拆除的方式。结果表明,爆破最优切口高度为2.0 m;通过对烟囱倒塌和解体过程图像分析可知,烟囱的爆破倒塌解体过程较为理想且符合工程实际,数值模拟结果与实际爆破效果高度吻合,可为同类拆除爆破提供经验。In order to further study the optimal blasting cut height of 100 m reinforced concrete chimney in a waste incineration plant in complex environment,the finite element software ANSYS/LS-DYNA was used to carry out numerical simulation for 3 working conditions with blasting cut height of 1.5 m,2.0 m and 2.5 m respectively.The collapse posture and maximum horizontal displacement of chimney blasting were compared and analyzed,and combing the structure and site environment of the chimney,the upper part of 57 m demolition blasting and the lower part of 43 m mechanical demolition are adopted.The results show that the optimal height is 2.0 m.Through the analysis of the image of chimney collapse and disintegration process cutting it can be seen that the process of chimney collapse and disintegration is ideal and in line with the engineering practice,and the numerical simulation results are highly consistent with the actual blasting effect,which can provide experience for similar demolition blasting.

关 键 词：拆除爆破 数值模拟 爆破切口高度 倒塌距离 

分 类 号：TD235[矿业工程—矿井建设]