Chracterizition of Dynamic Properties of Roof Bolts and their Applications

Abstract:

The dynamic properties of rock bolts are characterized by measurement. The acceleration and strain of a rock bolt specimen were recorded using axial impact testing in laboratory environment. The systems dynamic properties such as natural frequencies and damping are characterized by using spectral analysis and Wavelet method. The characterized dynamic properties are used to update and calibrate a system simulation model, which is a multiple-degree-of-freedom system involving roof mass, the roof bolt, grout interface and head connections. The proposed approach enables accurately and effectively quantifying system dynamic parameters and establishing the analytical model for the design, development and performance monitoring of roof bolting systems.

• Periodical: Advanced Materials Research (Volumes 875-877)
• Pages: 599-604
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.875-877.599
• Online since: February 2014
• Authors: Gang S. Chen, Gang Chen, Liang Biao Chen
• Keywords: Monitoring, Roof/Rock Bolt, Stability, Underground Support

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