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| Study on generation mechanism and evolution characteristics of Rayleigh wave in rock drilling and blasting |
| GAO Qidong1，2，3，LU Wenbo3，FAN Yong2，YANG Yubo1，ZHOU Haixiao1，LENG Zhendong4 |
| (1. School of Highway，Chang?an University，Xi?an，Shaanxi 710064，China；2. Hubei Key Laboratory of Construction and Management in Hydropower Engineering，China Three Gorges University，Yichang，Hubei 443002，China；3. State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China；
4. Gezhouba Group Explosive Co.，Ltd.，Chongqing 401121，China) |
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Abstract In this study，on the basis of the analysis of the source characteristics of the cylindrical charge，the generation mechanism and development process of the R-wave in rock drilling and blasting was unmasked by interpreting the reflection of curvellient body waves at the free surface. Then，to further investigate the growing process and evolution characteristics of the R-wave，the wave-type and wave-components induced by the cylindrical charge in the infinite and semi-infinite spaces were compared using the 3D dynamic finite simulation. Moreover，the onsite blasting experiment was also conducted to verify the growing characteristics of the R-wave. The results indicate that the R-wave is generated with the reflection of the explosive-source-emitted curvellient body waves at the ground surface，and it grows gradually with the epicenter distance r. The R-wave starts forming at about 0.6h (where is h the buried depth of the explosive source) far from the epicenter，and some gentle R-wave motions could be recognized when r exceed 2.0h. Whereas，the R-wave is still not fully developed and cannot be easily recognize until the incident angle of the curvellient body waves exceed a critical value，where r is larger than 5.0h. In the rock drilling and blasting，the source emitted P-wave?s motion approaches to the horizontal direction with r increasing，and its contribution mainly awards to the horizontal vibration. The source emitted S-wave component could be ignored and is easily covered by the fully developed R-wave，as the S-wave gradually deviates from its dominant radiation orientation. What?s more，the R-wave will dominate the vertical ground vibration when r exceeds 25.0h～35.0h.
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| [1] HAGAN T N. Rock breakage by explosives[J]. Acta Astronautica，1979，6(3)：329–340.
[2] 何 琪，严 鹏，卢文波，等. 微差段间重复扰动导致深埋隧洞围岩损伤机制[J]. 岩石力学与工程学报，2016，35(7)：1 386–1 396. (HE Qi，YAN Peng，LU Wenbo，et al. Damage mechanism of surrounding rocks due to repeated disturbance between blasting delays in deep tunnels[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(7)：1 386–1 396.(in Chinese))
[3] 杨建华，代金豪，姚 池，等. 岩石高边坡爆破开挖损伤区岩体力学参数弱化规律研究[J]. 岩土工程学报，2020，42(5)：968–975.(YANG Jianhua，DAI Jinhao，YAO Chi，et al. Weakening laws of rock mass properties in blasting excavation damage zone of high rock slopes[J]. Chinese Journal of Geotechnical Engineering，2020，42(5)：968–975.(in Chinese))
[4] 杨建华，姚 池，卢文波，等. 深埋隧洞钻爆开挖围岩振动频率特性研究[J]. 岩土力学，2017，38(4)：1 195–1 202.(YANG Jianhua，YAO Chi，LU Wenbo，et al. Vibration frequency characteristics of surrounding rock of deep tunnel induced by borehole-blasting[J]. Rock and Soil Mechanics，2017，38(4)：1 195–1 202.(in Chinese))
[5] 李新平，边 兴，罗 忆，等. 地下洞室边墙爆破振动传播衰减规律研究[J]. 岩土力学，2020，41(6)：2 063–2 069.(LI Xinping，BIAN Xing，LUO Yi，et al. Study on attenuation law of blasting vibration propagation of side wall of underground cavern[J]. Rock and Soil Mechanics，2020，41(6)：2 063–2 069.(in Chinese))
[6] 夏文俊，卢文波，陈 明，等. 白鹤滩坝址柱状节理玄武岩爆破损伤质点峰值振速安全阈值研究[J]. 岩石力学与工程学报，2019，38(增1)：2 997–3 007.(XIA Wenjun，LU Wenbo，CHEN Ming，et al. Study on safety threshold of peak particle velocity about blasting damage of columnar jointed basalt rock mass in Baihetan dam site[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.1)：2 997–3 007.(in Chinese))
[7] DOWDING C H. Blast vibration monitoring and control[M]. Englewood Cliffs：Prentice-Hall，1985：137–149.
[8] GAO Q D，LU W B，YANG Z W，et al. Analysis of evolution of seismic components induced by a vertical blasthole[J]. Rock Mechanics and Rock Engineering，2019，52(6)：1 959–1 977.
[9] 卢文波，李海波，陈 明，等. 水电工程爆破振动安全判据及应用中的几个关键问题[J]. 岩石力学与工程学报，2009，28(8)：1 513–1 520.(LU Wenbo，LI Haibo，CHEN Ming，et al. Safety criteria of blasting vibration in hydropower engineering and several key problems in their application[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 513–1 520.(in Chinese))
[10] KUZMENKO A A，VOROBEV V D，DENISYUK II，et al. Seismic effects of blasting in rock[M]. [S. l.]：[s. n.]，1993：16–22.
[11] FAVREAU R F. Generation of strain waves in rock by an explosion in a spherical cavity[J]. Journal of Geophysical Research，1969，74(17)：4 267–4 280.
[12] ACHENBACH J D. Wave propagation in elastic solids[M]. New York：North-Holland Publishing，1973：126–133.
[13] GRAFF K F. Wave motion in elastic solid[M]. New York：Dover publications，Inc.，1975：271–281.
[14] HEELAN P A. Radiation from a cylindrical source of finite length[J]. Geophysics，1953，18(3)：685.
[15] JORDAN D W. The stress wave from a finite，cylindrical explosive source[J]. Journal of Applied Mathematics and Mechanics，1962，11(4)：503–551.
[16] ABO-ZENA A M. Radiation from a finite cylindrical explosive source[J]. Geophysics，1977，42(7)：1 384–1 393.
[17] WHITE J E，SENGBUSH R L. Shear waves from explosive sources[J]. Geophysics，1963，28(6)：1 001–1 019.
[18] BLAIR D P. Seismic radiation from an explosive column[J]. Geophysics，2010，75(1)：55–65.
[19] BLAIR D P. Blast vibration dependence on charge length，velocity of detonation and layered media[J]. International Journal of Rock Mechanics and Mining Sciences，2014，65(1)：29–39.
[20] 金旭浩，卢文波，田 勇，等. 岩石爆破过程S波的产生机制分析[J]. 岩土力学，2011，32(增2)：228–232.(JIN Xuhao，LU Wenbo，TIAN Yong，et al. Analysis of mechanisms of S wave generated in rock blasting process[J]. Rock and Soil Mechanics，2011，32(Supp.2)：228–232.(in Chinese))
[21] GAO Q D，LU W B，YAN P，et al. Effect of initiation location on distribution and utilization of explosion energy during rock blasting[J]. Bulletin of Engineering Geology and the Environment，2019，78(5)：3 433–3 447.
[22] FOTI S，LAI C，RIX G，et al. Surface wave methods for near-surface characterization[M]. Boca Raton：CRC Press，2014：51–53.
[23] 王礼立. 应力波基础[M]. 北京：国防工业出版社，2005：317–321.(WANG Lili. Foundation of stress waves[M]. Beijing：National Defense Industry Press，2005：317–321.(in Chinese))
[24] AKI K，RICHARDS P G. Quantitative Seismology[M]. 2nd ed. Sausalito，California：University Science Books，2002：209–235.
[25] 高启栋，卢文波，杨招伟，等. 垂直孔爆破诱发地震波的成分构成及演化规律[J]. 岩石力学与工程学报，2019，38(1)：18–27.(GAO Qidong，LU Wenbo，YANG Zhaowei，et al. Components and evolution laws of seismic waves induced by vertical-hole blasting[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(1)：18–27.(in Chinese))
[26] 高启栋，卢文波，杨招伟，等. 水平光面爆破激发地震波的成分及衰减特征[J]. 爆炸与冲击，2019，39(8)：170–182.(GAO Qidong，LU Wenbo，YANG Zhaowei，et al. Components and attenuation of seismic waves induced by horizontal smooth blasting[J]. Explosion and Shock Waves，2019，39(8)：170–182.(in Chinese))
[27] 高启栋，卢文波，冷振东，等. 考虑爆源特征的岩石爆破诱发地震波的波型与组分分析[J]. 岩土力学，2021，42(10)：2 830–2 844. (GAO Qidong，LU Wenbo，LENG Zhendong，et al. Analysis of wave-type and seismic component induced by rock blasting considering source characteristics[J]. Rock and Soil Mechanics，2021，42(10)：2 830–2 844.(in Chinese))
[28] LI H B，XIA X，LI J C，et al. Rock damage control in bedrock blasting excavation for a nuclear power plant[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(2)：210–218.
[29] 严 鹏，卢文波，罗 忆，等. 基于小波变换时–能密度分析的爆破开挖过程中地应力动态卸载振动到达时刻识别[J]. 岩石力学与工程学报，2009，28(增1)：2 836–2 844.(YAN Peng，LU Wenbo，LUO Yi，et al. Identification of arriving time of vibration induced by geostress dynamic unloading during blasting-excavation employing method of time-energy analysis based on wavelet transform[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：2 836–2 844.(in Chinese)) |
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2023, Vol. 42 
