›› 2011, Vol. 32 ›› Issue (2): 326-332.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Theoretical analysis and test of impact load due to ore dumping in chute

SONG Wei-dong 1, 2, WANG Hong-yong 1, 2, WANG Xin 1, 2, DU Jian-hua 1, 2   

  1. 1. Key Laboratory of High-Efficient Mining and Safety of Metal, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2010-04-12 Online:2011-02-10 Published:2011-02-16

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Abstract:

To analyze the stability of ore chute, the regular pattern of the ore movement in the ore chute and the deformation law of ore chute should be researched. This article is based on the kinematics theory to discuss the regular pattern of the ore movement in the ore chute and a similar material simulation is made to test its results. The study shows that in the beginning the normal impact is larger than others and with the increase of shock times, the normal impact becomes weaker and the tangential impact grows. The main damage to the shaft changes from normal breakage to tangential breakage. The interval between two impact spots is getting bigger; and bigger and the angle of impact reduces gradually. After two or three times struck, ores fall into chute vertically. Through the theoretical derivation calculation, there would be two impact zones under the well head: one is from 2.0-5.6 m and the other is from 26.4-40.2 m. The impact range obtained from the experiment is from 1.95-10.2 m and 19.4-40.2 m; and that is a bit larger than the result from the calculation. The data of the pressure box changes difference: the max change from the impact areas, less change from the ore attrition areas.

Key words: impact load, theoretical derivation, impact zone, similar model test

CLC Number: 

  • TD 352
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