Study of rock cutting force prediction is of great significance for improving the efficiency of rock breaking and optimizing the tunnel boring process. A new prediction model named RCC (the Roxborough Model and the CSM Model and the Colorado School of Mines’ Data Integration) model is proposed to predict vertical, rolling and lateral forces acting on the disc cutter based on the theoretical model developed by Roxborough and Phillips (1975) (Roxborough model) and the theoretical model developed by Rostami (1997) (CSM model). The suggested model is based on the improvement that the shape of extrusion surface is reasonably assumed to be trapezoid and the arc segment at the edge of the cutter is reasonably simplified to a straight-line segment. Results of the full-scale linear cutting experiments by the Colorado School of Mines are used to validate the accuracy and reliability of the suggested model, some additional calculation results from the linear cutting prediction formula developed by Ozdemir et al. (1978) (Linear Cutting model) and the CSM model are also used in this purpose. The results indicate that the formulas for calculating vertical force and rolling force presented in this paper are more accurate than the Linear Cutting model and the CSM model. Although the calculation results of the lateral rock breaking force conforms to the variation law of lateral rock breaking force with the penetration and cutter spacing, they are smaller than the experimental data. Finally, through theoretical analysis of the suggested RCC model and numerical simulation by using ANSYS/LS-DYNA, the rationality of the simplified disc cutter used in the RCC model is verified and the influence of penetration depth on the rock cutting force is obtained, which provides a theoretical reference for the study of rock breaking mechanism and optimization of tunneling process.

岩体切削力预测研究对提高岩体破碎效率，优化隧道掘进过程具有重要意义。一个名为RCC的新预测模型（Roxborough模型和CSM在Roxborough和Phillips（1975）开发的理论模型和Roxborough开发的理论模型的基础上，提出了模型和科罗拉多矿业学校的Data Integration）模型来预测作用在圆盘切割机上的垂直，滚动和横向力。 Rostami（1997）（CSM模型）。建议的模型基于以下改进：合理地假定挤出表面的形状为梯形，并且将切刀边缘的弧段合理地简化为直线段。科罗拉多矿业学院进行的全面线性切割实验的结果用于验证所建议模型的准确性和可靠性，Ozdemir等人开发的线性切割预测公式还提供了一些额外的计算结果。（1978年）（线性切割模型）和CSM模型也用于此目的。结果表明，本文提出的计算垂直力和滚动力的公式比线性切削模型和CSM模型更为精确。尽管横向破岩力的计算结果符合横向破岩力随穿透力和刀具间距的变化规律，但均小于实验数据。最后，通过对建议的RCC模型进行理论分析并使用ANSYS / LS-DYNA进行数值模拟，验证了RCC模型中使用的简化圆盘铣刀的合理性，并得出了穿透深度对切岩力的影响，