李守巨,刘玉晶
Li Shouju(Dalian University of Technology; Liaoning 116024)Liu Yujing(Changchun Coal Management Cadre Institute;

• 1:大连理工大学!辽宁大连，116024
• 2:长春煤炭管理干部学院!长春，130012

摘要(Abstract)：

结合拆除爆破工程实践，建立了砖烟囱爆破切口圆心角的计算公式．计算结果表明：圆心角随烟囱质量的增加而减小，随烟囱半径和壁厚的增加而增大，随砖与砂浆之间粘接强度的增大而增大．大部分砖烟囱爆破切口圆心角的变化范围为149～196,°，建议除质量特别小的烟囱外，砖烟囱爆破切口圆心角不宜大于180°.
Combining with the demolition engineering practice, the central angle of blasting gap of brick chimney demolition has been calculated. The calculating results indicate that the central angle increases with chinmey radius, wall thickness and tensile strength raising, and reduas with chinmey mass increasing. The central angle of blasting gap of brick chinmey demolition changes from 149 degree to 196 degree. At last, the proposal is that the central angle of gap of brick chimney demolition should not be over 180 degree, except for chimneyS with smaller mass.

关键词(KeyWords)： 拆除爆破;砖烟囱;爆破切口圆心角;极限弯矩;倾倒力矩
Demolition blasting;Brick chimney;Central angle of blasting gap;Limited bending moment;Falling moment

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 李守巨,刘玉晶
Li Shouju(Dalian University of Technology; Liaoning 116024)Liu Yujing(Changchun Coal Management Cadre Institute;

参考文献(References)：

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