Studies on Rock-Breaking of Positive Disc Cutter and Edge Disc Cutter

Kai Yang; Yi Min Xia; Yuan Wu

doi:10.4028/www.scientific.net/AMM.508.159

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 508Studies on Rock-Breaking of Positive Disc Cutter...

Studies on Rock-Breaking of Positive Disc Cutter and Edge Disc Cutter

Abstract:

Based on TBM disc cutter layout, a rock-breaking model of positive disc cutter and edge disc cutter is built. Sequential rock-breaking of the two cutters under different parameters is simulated; rock fragmentation, three-axis force and energy consumption are studied; optimal rock-breaking condition with different parameters is determined; feasibility of the simulation model is finally verified by experiment. The results show that three-axis force of positive disc cutter and edge disc cutter both increase with the increase of rock strength. Also, the increase of installation angle leads to larger three-axis force of edge disc cutter. Compared with positive disc cutter, edge disc cutter suffers larger squeezing strength from rocks, which results in larger three-axis force in edge disc cutter. Specific energy consumption variation has an inflection point. To meet optimal rock-breaking condition, the optimal values of installation angle in breaking siltstone, granite and marble are respectively 6°, 7° and 7°.

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Periodical:

Applied Mechanics and Materials (Volume 508)

Pages:

159-164

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.508.159

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Online since:

January 2014

Authors:

Kai Yang*, Yi Min Xia, Yuan Wu

Keywords:

Edge Disc Cutter, Installation Angle, Optimal Rock-Breaking, Three-Axis Force

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* - Corresponding Author

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