爆破载荷作用下高地应力巷道PPV衰减规律研究  

Attenuation law of PPV in high crustal stress tunnels under blasting load

作　　者：乔国栋 刘泽功[1,2] 高魁 傅师贵[1,2] 张健玉 刘华举 QIAO Guodong;LIU Zegong;GAO Kui;FU Shigui;ZHANG Jianyu;LIU Huaju(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China;Guqiao Coal Mine,Huaihe Energy(Group)Co.,Ltd.,Huainan 232150,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]合肥综合性国家科学中心能源研究院,安徽合肥230031 [3]淮河能源集团顾桥煤矿,安徽淮南232150

出　　处：《振动与冲击》2023年第23期260-266,283,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(52074013,52374179);华能集团总部科技项目能源安全技术专项(HNKJ20-H87);合肥综合性国家科学中心能源研究院项目(21KZS216);安徽省教育厅高校研究生科研基金项目(YJS20210396);安徽理工大学2022年研究生创新基金项目(2022CX1003);安徽省自然科学基金资助项目(2208085ME125);安徽省教育厅高校自然科学基金项目(KJ2020A0327,KJ2021A0419)。

摘　　要：为研究深部高地应力条件下巷道围岩质点峰值振速(Peak particle velocity, PPV)衰减规律,以淮南潘三矿超前卸压预裂爆破扰动瓦斯综治巷为工程背景,使用ANSYS/LS-DYNA数值模拟软件对不同地应力下巷道围岩的PPV衰减规律进行研究。使用理论分析与数值模拟相结合的方法,从动应力、振动能量的角度对地应力与PPV之间的关系做出了解释。结果表明:随着爆心距增大,PPV整体上呈指数型衰减;在相同爆心距下,地应力越大,PPV越小且衰减速度越慢;随着爆心距增大,地应力对PPV抑制作用减弱;由于爆炸应力波的反射叠加效应,巷道迎爆侧围岩PPV衰减曲线出现反复波动,在自由面处获得最大峰值;迎爆侧围岩仍然遵循地应力越大PPV越小的规律。研究结果对深部高地应力爆破作业方案优化设计及深井爆破振动安全判据、构筑物动力响应特征的研究具有指导意义。Here,to study attenuation law of peak particle velocity(PPV)of surrounding rock in tunnels under deep high crustal stress conditions,taking disturbance of gas comprehensive control tunnels caused by advanced unloading presplitting blasting at Pansan Mine in Huainan as the engineering background,the numerical simulation software ANSYS/LS-DYNA was used to study PPV attenuation law of surrounding rock in tunnels under different crustal stresses.The relation between crustal stress and PPV was explained from perspectives of dynamic stress and vibration energy using a combination of theoretical analysis and numerical simulation.The results showed that PPV decays in form of exponential type as a whole with increase in explosion center distance;under the same explosion center distance,the larger the crustal stress,the smaller the PPV and the slower the attenuation rate;with increase in explosion center distance,the suppressing effect of crustal stress on PPV weakens;due to reflection and superposition effect of explosive stress waves,PPV attenuation curve of surrounding rock on blasting side of tunnel has repeated fluctuations to reach the maximum peak value at free surface;surrounding rock on blasting side still follows the law of larger crustal stress and smaller PPV;the study results have guiding significance for optimization design of deep high crustal stress blasting operation schemes as well as studying safety criteria of deep well blasting vibration and dynamic response characteristics of structures.

关 键 词：地应力 爆破安全 质点峰值振速(PPV) 振速衰减 

分 类 号：X936[环境科学与工程—安全科学]