To investigate the matching rules of cutters with different blade widths in hard rock and extremely hard rock environments, this study carries out a full-scale cutting test of 432-mm disc cutters with blade widths of 12 mm, 19 mm and 30 mm. A multifunctional cutter performance experimental system was used to test the cutting loads and rock-breaking quantity of rust stone granite (hereinafter referred to as hard rock) and granite (hereinafter referred to as extremely hard rock) as well as to analyse the specific energy consumption for rock breaking under different cutting parameters. The experimental results show that (1) the blade width has a greater influence on the normal force than on the rolling force. The rock-breaking resistance of the 12-mm-blade-width cutters under extremely hard rock conditions is 36.7% lower than that of conventional cutters. (2) Under the same conditions, the smaller the blade width is, the smaller the specific rock-breaking energy consumption is and the smaller the optimal cutter spacing is. Under extremely hard rock condition, the specific energy consumption of the 12-mm-blade-width cutters is 37.9% lower than that of conventional cutters. (3) With a certain gross thrust of a single cutter, the rock-breaking quantity of a single 12-mm-blade-width cutter is much larger than that of the 19-mm-blade-width cutter, regardless of the types of rock. Under extremely hard rock conditions, the S/P of the 12-mm-blade-width cutter with the highest rock-breaking efficiency is approximately 10–12.

为了研究在硬岩石和极硬岩石环境中具有不同刀片宽度的刀具的匹配规则，本研究对432 mm刀片宽度为12 mm，19 mm和30 mm的圆盘刀具进行了全面切割测试。使用多功能刀具性能实验系统测试锈石花岗岩（以下简称硬岩）和花岗岩（以下称为极硬岩）的切削载荷和破岩量，并分析比能耗用于在不同切割参数下破碎岩石。实验结果表明：（1）叶片宽度对法向力的影响大于对滚动力的影响。在极硬的岩石条件下，12毫米刀片宽刀具的抗碎石能力为36。比传统刀具低7％。（2）在相同条件下，锯片宽度越小，则碎石的单位能耗越小，最佳刀具间距也越小。在极硬的岩石条件下，12毫米刀片宽度刀具的单位能耗比传统刀具低37.9％。（3）在单个刀具具有一定的总推力的情况下，无论哪种刀片类型，单个12mm刀片宽度的刀具的碎石量都比19mm刀片宽度的刀具大得多。岩。在极端坚硬的岩石条件下，12毫米刀片宽度刀具的单位能耗比传统刀具低37.9％。（3）在单个刀具具有一定的总推力的情况下，无论哪种刀片类型，单个12mm刀片宽度的刀具的碎石量都比19mm刀片宽度的刀具大得多。岩。在极端坚硬的岩石条件下，12毫米刀片宽度刀具的单位能耗比传统刀具低37.9％。（3）在单个刀具具有一定的总推力的情况下，无论哪种刀片类型，单个12mm刀片宽度的刀具的碎石量都比19mm刀片宽度的刀具大得多。岩。在极端坚硬的岩石条件下，具有最高碎石效率的12毫米刀片宽度刀具的S / P约为10–12。