Propagation Rules and Development of Shock Wave Caused by Roof Caving in Goaf

Hai Yun Feng; Gao Feng Ren; Jun Lin Lv; Sa Sa Zhang

doi:10.4028/www.scientific.net/AMR.1055.103

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1055Propagation Rules and Development of Shock Wave...

Propagation Rules and Development of Shock Wave Caused by Roof Caving in Goaf

Abstract:

The purpose of this research is to find propagation rules and development of shock wave caused by roof caving in goaf. The test equipment which was used consisted of high-speed camera and schlieren system. Different kind of roadways have been designed to discuss the propagation rules and development of falling shock wave in different roadway.The results of the experiment indicated that no matter what kind of roadway the shock wave in, the propagation process can roughly divide into two stages. In the first stage, the velocity of shock wave is slower than the second stage and the face of shock wave are clearer, the lines are smoother. But in the second stage, the velocity of shock wave are faster than the first stage and there are many whirls, the lines are more tiny and chaotic. Further research into shock wave caused by roof caving in goaf is necessary.

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Periodical:

Advanced Materials Research (Volume 1055)

Pages:

103-108

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1055.103

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Online since:

November 2014

Authors:

Hai Yun Feng*, Gao Feng Ren, Jun Lin Lv, Sa Sa Zhang

Keywords:

GOAF, High-Speed Camera, Mining Damage, Schlieren System, Shock Wave

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* - Corresponding Author

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