Analysis of wave-type and seismic component induced by rock blasting considering source characteristics
The blasting induced seismic waves are generally composed of compressional wave (P-wave), shear wave (S-wave), and Rayleigh wave (R-wave), however, wave-type and seismic components are not differentiated in the attenuation law and safety criteria for the current blast vibration studies. In this stu...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2021-10-01
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| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5108 |
| _version_ | 1811314967224254464 |
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| author | GAO Qi-dong LU Wen-bo LENG Zhen-dong WANG Ya-qiong ZHOU Hai-xiao ZHANG Shi-chao |
| author_facet | GAO Qi-dong LU Wen-bo LENG Zhen-dong WANG Ya-qiong ZHOU Hai-xiao ZHANG Shi-chao |
| author_sort | GAO Qi-dong |
| collection | DOAJ |
| description | The blasting induced seismic waves are generally composed of compressional wave (P-wave), shear wave (S-wave), and Rayleigh wave (R-wave), however, wave-type and seismic components are not differentiated in the attenuation law and safety criteria for the current blast vibration studies. In this study, a method of wave-type discrimination is used for the seismic wave prediction based on polarization direction. Using theoretical analysis and numerical modelling, the blasting source characteristics and the radiated wave-types are investigated for different shapes of explosive charge. Combined the results of the site blasting experiments, the wave-type and seismic components induced by three typical blast-holes are analyzed and three blast holes include the single vertical blast-hole, the smooth blast-hole, and the slope pre-splitting blast-hole. The source characteristics and acting mechanism are then discussed for different blast-holes. The dominant wave-type at special location is predicted for three blast types. The research results indicate that the blasting source of the vertical blast-hole can be viewed as a delay superposition of the short explosive column. All the P-, S-, and R-waves contribute to the ground surface vibration from the vertical blast-hole. With the increase of the blasting-target distance, it is found that the S-wave gradually deviates from its dominant radiation direction, while the P-wave mainly contributes to the horizontal radial vibration, and the R-wave dominates the vertical vibration. Because the horizontal smooth blast-hole and the slope pre-splitting blast-hole are both contour blast-holes, the two blast holes have a similar acting mechanism, in which the main acting force is the loading from the normal surface. The S- and R-waves are the dominant seismic wave types within the blasting contour surface, whereas the role of the P-wave is negligible. Besides, the R-wave becomes the dominant wave-type as the blasting center distance increases; however, the contribution of P-wave outside the contour surface cannot be ignored. |
| first_indexed | 2024-04-13T11:21:56Z |
| format | Article |
| id | doaj.art-31b0307d07dc48fda2317074384f701f |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-04-13T11:21:56Z |
| publishDate | 2021-10-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-31b0307d07dc48fda2317074384f701f2022-12-22T02:48:48ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982021-10-0142102830284410.16285/j.rsm.2021.5108Analysis of wave-type and seismic component induced by rock blasting considering source characteristics GAO Qi-dong0LU Wen-bo1LENG Zhen-dong2WANG Ya-qiong3 ZHOU Hai-xiao4ZHANG Shi-chao51. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of the Ministry of Education, Wuhan University, Wuhan, Hubei 430072, China3. China Gezhouba Group Explosive Co., Ltd., Chongqing 401121, China1. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China1. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China1. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China The blasting induced seismic waves are generally composed of compressional wave (P-wave), shear wave (S-wave), and Rayleigh wave (R-wave), however, wave-type and seismic components are not differentiated in the attenuation law and safety criteria for the current blast vibration studies. In this study, a method of wave-type discrimination is used for the seismic wave prediction based on polarization direction. Using theoretical analysis and numerical modelling, the blasting source characteristics and the radiated wave-types are investigated for different shapes of explosive charge. Combined the results of the site blasting experiments, the wave-type and seismic components induced by three typical blast-holes are analyzed and three blast holes include the single vertical blast-hole, the smooth blast-hole, and the slope pre-splitting blast-hole. The source characteristics and acting mechanism are then discussed for different blast-holes. The dominant wave-type at special location is predicted for three blast types. The research results indicate that the blasting source of the vertical blast-hole can be viewed as a delay superposition of the short explosive column. All the P-, S-, and R-waves contribute to the ground surface vibration from the vertical blast-hole. With the increase of the blasting-target distance, it is found that the S-wave gradually deviates from its dominant radiation direction, while the P-wave mainly contributes to the horizontal radial vibration, and the R-wave dominates the vertical vibration. Because the horizontal smooth blast-hole and the slope pre-splitting blast-hole are both contour blast-holes, the two blast holes have a similar acting mechanism, in which the main acting force is the loading from the normal surface. The S- and R-waves are the dominant seismic wave types within the blasting contour surface, whereas the role of the P-wave is negligible. Besides, the R-wave becomes the dominant wave-type as the blasting center distance increases; however, the contribution of P-wave outside the contour surface cannot be ignored. http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5108rock blastingblasting-induced seismic wavesource characteristicswave-type and seismic componentsdominant wave-type |
| spellingShingle | GAO Qi-dong LU Wen-bo LENG Zhen-dong WANG Ya-qiong ZHOU Hai-xiao ZHANG Shi-chao Analysis of wave-type and seismic component induced by rock blasting considering source characteristics Rock and Soil Mechanics rock blasting blasting-induced seismic wave source characteristics wave-type and seismic components dominant wave-type |
| title | Analysis of wave-type and seismic component induced by rock blasting considering source characteristics |
| title_full | Analysis of wave-type and seismic component induced by rock blasting considering source characteristics |
| title_fullStr | Analysis of wave-type and seismic component induced by rock blasting considering source characteristics |
| title_full_unstemmed | Analysis of wave-type and seismic component induced by rock blasting considering source characteristics |
| title_short | Analysis of wave-type and seismic component induced by rock blasting considering source characteristics |
| title_sort | analysis of wave type and seismic component induced by rock blasting considering source characteristics |
| topic | rock blasting blasting-induced seismic wave source characteristics wave-type and seismic components dominant wave-type |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5108 |
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