Influence of wind load acted on tall chimney in directional blasting

Han Fang; Zhong Dong-wang; Han Xin-xing; Zeng Xiang-long; Tang Yu-cheng; Liu Ying

doi:10.11883/1001-1455(2014)05-0554-06

Volume 34 Issue 5

Dec. 2014

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Han Fang, Zhong Dong-wang, Han Xin-xing, Zeng Xiang-long, Tang Yu-cheng, Liu Ying. Influence of wind load acted on tall chimney in directional blasting[J]. Explosion And Shock Waves, 2014, 34(5): 554-559. doi: 10.11883/1001-1455(2014)05-0554-06

Citation:

Han Fang, Zhong Dong-wang, Han Xin-xing, Zeng Xiang-long, Tang Yu-cheng, Liu Ying. Influence of wind load acted on tall chimney in directional blasting[J]. Explosion And Shock Waves, 2014, 34(5): 554-559. doi: 10.11883/1001-1455(2014)05-0554-06

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Influence of wind load acted on tall chimney in directional blasting

doi: 10.11883/1001-1455(2014)05-0554-06

1.
Department of Engineering Mechanics, School of Science, Wuhan University of Science and Technology, Wuhan 430033, Hubei, China
2.
Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan University of Science and Technology, Wuhan 430033, Hubei, China

Received Date: 2013-04-11
Rev Recd Date: 2013-05-26
Publish Date: 2014-09-25

Abstract

Abstract

The deflection angle formula was derived based on the neutral axis equation with the tall chimney blasting cut section under the action of both along-wind load and across-wind resonance.Then a series of wind load cases were considered as follows:different wind Beaufort scales (grade 4-grade 6), different blasting incision angles (190°-220°) and different wind load directions (0°-180°).Their influences were achieved on the directional blasting demolition.In addition, the maximum deflection angle of the tall chimney and its existence condition were discussed.The corresponding conclusion was verified by taking the 210 mhigh chimney in Nanchang power plant as an example.The results showed that the deflection angle considering the across-wind resonance was 4-6 times as big as that considering the along-wind load.Furthermore, there existed the most unfavorable wind direction angle which would cause the maximum deflection angle under certain conditions.The maximum deflection angle would increase with the increasing wind Beaufort scale and would decrease with the decreasing blasting incision angle.
- mechanics of explosion,
- across-wind resonance,
- deflection angle,
- directional blasting,
- wind load,
- tall chimney

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References(10)

References

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