Attenuationcharacteristicsandtopographiceffectof ascientificexplosionwith50texplosive

LIU Ai-wen; YU Yan-xiang; FU Chang-hua; CHEN Kun; ZHAO Ji-sheng; ZHOU Zheng-hua; WANG Wei

doi:10.11883/1001-1455(2010)01-0021-06

Volume 30 Issue 1

May 2014

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LIU Ai-wen, YU Yan-xiang, FU Chang-hua, CHEN Kun, ZHAO Ji-sheng, ZHOU Zheng-hua, WANG Wei, . Attenuationcharacteristicsandtopographiceffectof ascientificexplosionwith50texplosive[J]. Explosion And Shock Waves, 2010, 30(1): 21-26. doi: 10.11883/1001-1455(2010)01-0021-06

Citation:

LIU Ai-wen, YU Yan-xiang, FU Chang-hua, CHEN Kun, ZHAO Ji-sheng, ZHOU Zheng-hua, WANG Wei, . Attenuationcharacteristicsandtopographiceffectof ascientificexplosionwith50texplosive[J]. Explosion And Shock Waves, 2010, 30(1): 21-26. doi: 10.11883/1001-1455(2010)01-0021-06

Citation:

LIU Ai-wen, YU Yan-xiang, FU Chang-hua, CHEN Kun, ZHAO Ji-sheng, ZHOU Zheng-hua, WANG Wei, . Attenuationcharacteristicsandtopographiceffectof ascientificexplosionwith50texplosive[J]. Explosion And Shock Waves, 2010, 30(1): 21-26. doi: 10.11883/1001-1455(2010)01-0021-06

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Attenuationcharacteristicsandtopographiceffectof ascientificexplosionwith50texplosive

doi: 10.11883/1001-1455(2010)01-0021-06

1.
InstituteofGeophysics,ChinaEarthquakeAdministration,Beijing100081,China;
2.
InstituteofEngineering Mechanics,ChinaEarthquakeAdministration,

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Corresponding author: LIU Ai-wen
Publish Date: 2010-01-25

Abstract

Abstract

Vibrationattenuationandtopographiceffectweremonitoredneartheexplosionplaceof50t explosive.Basedontherecordedvibrationsignals,theattenuationsofverticalvelocityandaccelerationwereanalyzedwiththeSadauskasformula. Therapidattenuationofvibrationwasrelatedwith thelayeredmoderate-hardnessrocksandthelocalterrainandgully.Thetime-frequencydistribution ofthevibrationwasobtainedbythediscretewavelettransform (db8wavelet).Thefrequencyofvibrationenergyconcentrationwasreducedandthedurationofthevibrationwasprolongedwiththeincreaseofthedistancefromt eexplosioncenter.AccordingtotheChineseSeismicIntensityScale,the vibrationintensityclosetotheexplosioncenterisuptoⅦ,however,theblastingvibrationintensity decayfasterthantheattenuationofearthquakeintensity.Thetopographiceffectwasdiscussedby comparingthevibrationrecordsatdifferentlocationsofa14-m-highhill.Duetothefocusingvibrationenergyofthehill, thepeakaccelerationonthetopofthehillis2.4timeslargerthanthatatthe footofthehill,andthespecialfrequencybandswiththeenlargedamplitudeisrelatedwiththesize andtheheightofthehill.Thefigureofparticlemotionsindicatesthatthelateralswingandrotational motiongraduallyincreasefromthefoottothetopofthehill.
- mechanicsofexplosion,
- attenuationcharacteristics,
- time-frequencyanalysis,
- blastingvibration,
- topographiceffect,
- vibrationintensity