Damage Analysis of Fresh Shotcrete under Excavating Blast Load
Ding Tai-shan · Chinese Journal of Underground Space and Engineering · 2006
According to the concrete damage theory,the influence of air shock wave caused by the underground excavating blast on fresh shotcrete lining structure has been analyzed by finite element simulation technique in this paper.The analysis results give the maximum damage degree of shotcrete lining structure quantitatively.The damage influence of lining is analyzed under different shotcrete layer thickness,drifting footage and time of working circulation,amount of dynamite and some other factors.The rules of the damage development in lining structure are summarized.These are very important references in underground excavating blast and initial shotcrete lining design.