Propagation Regularity of Air Shock Wave in Turning Roadway
Volume 4, Issue 3, September 2019, Pages: 43-53
Received: Oct. 16, 2019;
Accepted: Nov. 23, 2019;
Published: Dec. 5, 2019
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Chunhui Song, Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space, Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, China
Xianglong Li, Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space, Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, China
Zihao Tao, Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space, Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, China
Xi Zhang, Yuxi Mining Co., Ltd. Yuxi, China
Yingming Duan, Yuxi Mining Co., Ltd. Yuxi, China
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In order to study the propagation law of explosive shock wave in underground turning roadway, the peak overpressure value in the roadway with specific turning angle was compared and analyzed by combining field monitoring experiment with ANSYS numerical simulation. The results show that the blast wave propagates forward in a stable plane wave before turning. Before the explosion air shock wave propagates to the turn, it follows the propagation law in the straight through roadway. After turning, the diffraction and reflection through the wall of the roadway will form a turbulence zone of 10-20m, and then continue to propagate forward in a stable plane wave. The turning roadway has a certain attenuation effect on the propagation of the shock wave. By analyzing the peak overpressure value before and after turning, the attenuation coefficient values of roadways at various turning angles are determined, That is, the attenuation coefficient values corresponding to the turning angles of 30°, 60°, 90°, 120° and 150° are 1.25, 1.31, 1.45, 1.50, 1.65, respectively, and the attenuation coefficient values are fitted with the roadway turning angle formula to obtain the quantitative calculation formula, which can provide reference for the safety of underground personnel, equipment and the design and production of mines.
Explosion Shock Wave, Turning Roadway, Numerical Simulation, Attenuation Coefficient
To cite this article
Propagation Regularity of Air Shock Wave in Turning Roadway, Engineering Science.
Vol. 4, No. 3,
2019, pp. 43-53.
Copyright © 2019 Authors retain the copyright of this article.
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