DESIGN AND OPTIMIZATION OF DEBRIS SHIELD OF POWERED SHIELD SUPPORT WITH LARGE MINING HEIGHT

摘要

One of the difficulties of the world's mining industry is how to ensure safe and reliable work of the powered support with large mining height of more than 6 m. In this paper, first mechanical model of powered support with large mining height was established, the mechanical characteristics of powered support was analyzed, and the stress analysis and preliminary design was made for the debris shield of the powered support. Then the whole 3D model of powered support with large mining height was established based on computer-aid design (CAD), and the finite element method (using the software ANSYS®) was used to analyze and calculate the stress according to the new inspection standard of MT312-2000. It is found that there is too large stress and obvious stress concentration in the debris shield of powered support. Through the structural improvement of debris shield, the maximum stress value of the debris shield was greatly reduced, the stress concentration was greatly improved, and the intensity optimization was achieved. This ensures the reliability of the powered support with large mining height. Improved debris shield demonstrates a good effect in practical use.