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Open AccessArticle

Failure Probability Prediction of Thermally Stable Diamond Composite Tipped Picks in the Cutting Cycle of Underground Roadway Development

CSIRO Mineral Resources, PO Box 883, Kenmore, QLD 4069, Australia
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Appl. Sci. 2019, 9(16), 3294; https://doi.org/10.3390/app9163294
Received: 17 July 2019 / Revised: 3 August 2019 / Accepted: 6 August 2019 / Published: 11 August 2019
(This article belongs to the Special Issue Fatigue and Fracture of Non-metallic Materials and Structures)
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Abstract

The Thermally Stable Diamond Composite (TSDC) tipped pick has been developed to replace Tungsten Carbide (WC) tipped picks for hard rock cutting. Due to the material properties of TSDC, a major failure mode of TSDC tipped picks during rock cutting is random failures caused by excessive bending force acting on the cutting tips. A probabilistic approach has been proposed to estimate the failure probability of picks with this failure mode. However, there are two limitations in existing research: only one drum revolution is considered, and the variation of rock thickness is ignored. This study aims to extend the current approach via removing these limitations, based on the failure probability analysis of picks over a full cutting cycle in the underground coal mining roadway development process. The research results show that both drum advance direction and the variation of rock thickness have significant impacts on pick failure probability. The extended approach can be used to estimate pick failure probability for more realistic scenarios in real applications with improved accuracy. Although the study focused on TSDC tipped picks, the developed approach can also be applied to other types of picks. View Full-Text
Keywords: failure probability; diamond composite; material failure characteristics; reliability; rock cutting picks; mining; civil engineering failure probability; diamond composite; material failure characteristics; reliability; rock cutting picks; mining; civil engineering
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Sun, Y.; Li, X.; Guo, H. Failure Probability Prediction of Thermally Stable Diamond Composite Tipped Picks in the Cutting Cycle of Underground Roadway Development. Appl. Sci. 2019, 9, 3294.

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