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依据煤岩破碎理论，分析了纵轴式拖进机经济截割时，截距与截深、截深与切割臂水平摆动速度之间的关系。建立了切割臂水平摆动速度数学模型。结论可供切割头设计人员和掘进机使用者参考。
According to the theory of rock breaking, the relationship between the intercept and depth of cut, the depth of cut and the horizontal swinging speed of cutting arm during longitudinal cutting is analyzed. The mathematical model of horizontal swing speed of cutting arm is established. Conclusion for cutting head designers and users of boring machine reference.