| 大前石岭岩堆斜坡坡面爆破振动动力响应特征* |
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| 引用本文： | 朱大鹏,谢昌建,阿布拉铁,许红波.大前石岭岩堆斜坡坡面爆破振动动力响应特征*[J].中国安全生产科学技术,2022,18(8):121-127. |
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| 作者姓名： | 朱大鹏 谢昌建 阿布拉铁 许红波 |
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| 作者单位： | (1.西南石油大学 地球科学与技术学院，四川 成都 610500；2.三峡库区地质灾害教育部重点实验室（三峡大学），湖北 宜昌 443002；3.岳池县发展和改革局，四川 广安 638300） |
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| 基金项目： | * 基金项目: 国家自然科学基金项目(41302256)；三峡库区地质灾害教育部重点实验室开放基金项目(2020KDZ06) |
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| 摘 要： | 为探究爆破振动作用下岩堆斜坡动力响应特征，防止爆破引起坡面岩堆失稳，构建大前石岭岩堆斜坡爆破振动三维有限元模型，基于实测数据进行数值模拟验证，研究爆破引发的岩堆斜坡坡面位移、速度及加速度在不同方向、坡面位置及用药量下的响应规律。研究结果表明:岩堆体位移、速度及加速度呈波浪状“先快后慢”式衰减；垂直振动最剧烈，隧道轴线和水平方向振动较弱且相差不大；坡面位移、速度、加速度峰值与爆心距呈负相关关系，与药量呈线性增大关系；离爆破掌子面最近的坡面处垂直方向峰值速度最大，应将该点作为爆破振动安全评价关键点，且K，α推荐值分别为30，1.2左右。研究结果有助于深入认识爆破作用下岩堆坡面动力响应特征，为经济、安全施工提供参考。
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| 关 键 词： | 岩堆斜坡 爆破振动 振动响应 |
Dynamic response characteristics of blasting vibration on slope surface of Daqianshiling talus slope |
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| ZHU Dapeng,XIE Changjian,ABU Latie,XU Hongbo.Dynamic response characteristics of blasting vibration on slope surface of Daqianshiling talus slope[J].Journal of Safety Science and Technology,2022,18(8):121-127. |
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| Authors: | ZHU Dapeng XIE Changjian ABU Latie XU Hongbo |
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| Affiliation: | (1.School of Geoscience and Technology,Southwest Petroleum University,Chengdu Sichuan 610500,China;2.Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University),Ministry of Education,Yichang Hubei 443002,China;3.Development and Reform Bureau of Yuechi County,Guang’an Sichuan 638300,China) |
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| Abstract: | In order to explore the dynamic response characteristics of talus slope under the blasting vibration and prevent the instability of talus slope caused by blasting,a three-dimensional finite element model of the Daqianshiling talus slope under blasting vibration was constructed,and the numerical simulation verification was conducted based on the field measured data.The response law of displacement,velocity and acceleration of talus slope surface caused by blasting under different directions,slope surface positions and quantities of explosives was studied.The results showed that the displacement,velocity and acceleration of the talus mass presented the attenuation in a wave-like “first fast and then slow” manner.The vertical vibration was the most intense,while the vibration in horizontal direction and tunnel axis direction was weak and there was little difference between them.The peak values of displacement,velocity and acceleration on the slope surface were inversely correlated with the distance between blasting center and slope surface,and increased linearly with the quantity of explosives.The peak velocity in the vertical direction of slope surface being the closest to the blasting face was the largest,and this point should be regarded as the key point of blasting vibration safety evaluation,and the recommended values of K and α were about 30 and 1.2,respectively.The in-depth understanding of the dynamic response characteristics of talus slope under blasting can provide reference for the economical and safe construction. |
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| Keywords: | talus slope blasting vibration vibration response |
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