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The three-dimension model for the rock-breaking mechanism of disc cutter and analysis of rock-breaking forces

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Abstract

To study the rock deformation with three-dimensional model under rolling forces of disc cutter, by carrying out the circular-grooving test with disc cutter rolling around on the rock, the rock mechanical behavior under rolling disc cutter is studied, the mechanical model of disc cutter rolling around the groove is established, and the theory of single-point and double-angle variables is proposed. Based on this theory, the physics equations and geometric equations of rock mechanical behavior under disc cutters of tunnel boring machine (TBM) are studied, and then the balance equations of interactive forces between disc cutter and rock are established. Accordingly, formulas about normal force, rolling force and side force of a disc cutter are derived, and their validity is studied by tests. Therefore, a new method and theory is proposed to study rock-breaking mechanism of disc cutters.

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Authors and Affiliations

  1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, 102206, Beijing, China

    Zhao-Huang Zhang

  2. School of Foreign Languages, North China Electric Power University, 102206, Beijing, China

    Fei Sun

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  1. Zhao-Huang Zhang
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  2. Fei Sun
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Correspondence to Zhao-Huang Zhang.

Additional information

The project was supported by the National Natural Science Foundation of China (51075147).

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Zhang, ZH., Sun, F. The three-dimension model for the rock-breaking mechanism of disc cutter and analysis of rock-breaking forces. Acta Mech Sin 28, 675–682 (2012). https://doi.org/10.1007/s10409-012-0076-9

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  • DOI: https://doi.org/10.1007/s10409-012-0076-9

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