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Study of slope vibration site effects and energy analysis from CO2 static blasting

二氧化碳静态爆破的边坡振动场地效应和能量分析

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Abstract

The novel CO2 static blasting method offered good prospects for application as it was more effective than mechanical rock breaking, less vibratory, less dusty and quieter than the traditional drill and blast method. We carried out both true triaxial CO2 static blasting fracturing experiments and rock-breaking site vibration monitoring experiments to extract vibration signal characteristics, focusing on slope safety. The results show that: 1) the peak vibration velocity of CO2 static blasting decayed rapidly and dropped below 30 mm/s at 6 m; 2) the principal frequency of the vibration waveform spectrum caused by CO2 static blasting was higher than that of the drill-and-blast method; 3) the vibration velocity prediction formula used in the drill-and-blast method was applicable to CO2 static blasting, and the prediction formula with elevation was more accurate. An HIG fracturing model for CO2 static blasting is proposed, which provides a basic framework for research of new rock-breaking techniques. The vibration displacement of the slope under CO2 static blasting is minimal, and more attention should be paid to the exothermic and temperature measurement of the polyenergy agent in the future.

摘要

进行真三轴CO2 静态爆破压裂实验和现场测试, 获得压力曲线、试样裂隙分布、现场振动曲线 和岩体破坏特征, 获得压力曲线、试样裂隙分布、现场振动曲线 和岩体破坏特征, 同时还利用窗函数傅里叶变 换提取振动特征, 以评估破岩现场边坡的结构安全。研究结果表明:(1)CO2 静态爆破的峰值振动速度 在8 m 处衰减至满足建筑物保护要求, 比传统的钻爆法更安全: 比传统的钻爆法更安全, 且随着距离的加长, 振动能量的分布逐渐分散; (3)钻爆法的振动速度预测公式适用 于CO2 静态爆破的, 且带高程的预测公式更为准确。根据压力曲线、试样裂隙分布和现场岩体损伤, 提出CO2 静态爆破的HIG 破岩模型, 为新技术的研究提供了基础框架。在实验中没有采集到温度数 据, 为新技术的研究提供了基础框架。在实验中没有采集到温度数 据

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Authors and Affiliations

  1. School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Xiao-fei Wang  (王小飞) & En-yuan Wang  (王恩元)

  2. Tunnel and Underground Engineering Institute, College of Civil and Transportation Engineering, Hohai University, Nanjing, 210098, China

    Shao-bin Hu  (胡少斌)

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  1. Xiao-fei Wang  (王小飞)
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  3. En-yuan Wang  (王恩元)
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Contributions

WANG Xiao-fei developed the overarching research goals and edited the draft of the manuscript. HU Shao-bin conducted the literature review and wrote the manuscript. WANG En-yuan validated the proposed method with practical experiments and wrote the first draft of the manuscript.

Corresponding authors

Correspondence to Shao-bin Hu  (胡少斌) or En-yuan Wang  (王恩元).

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WANG Xiao-fei, HU Shao-bin, and WANG Enyuan declare that they have no conflict of interest.

Additional information

Foundation item: Project(51934007) supported by the Key Project of the National Natural Science Foundation of China; Project (2022YFC3004700) supported by the National Key Research and Development Programme of China; Project (BK20201313) supported by the Natural Science Foundation of Jiangsu Province, China; Project(2019JZZY020505) supported by the Major Scientific and Technological Innovation Project of Shandong Province, China

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Wang, Xf., Hu, Sb. & Wang, Ey. Study of slope vibration site effects and energy analysis from CO2 static blasting. J. Cent. South Univ. 31, 210–224 (2024). https://doi.org/10.1007/s11771-023-5466-6

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