研究目的:为研究不同刀具布置方式下预切槽设备的切削特性，本文利用有限元软件建立四种刀具布置 方式的刀具切削仿真模型，对不同刀具布置方式下多刀切削破岩过程进行模拟，分析不同刀具布置下的切刀 破岩水平载荷和切刀破岩比能耗。 研究结论：(1)链刀切削岩土时，垂直推进阻力远小于水平推进阻力;（2)在四种布刀方式中，当贯人度为 6 mm时，方案a切刀所受平均水平载荷最小，为485 N，方案b切刀所受平均水平载荷最大，为548 N;(3)方 案E切刀所受平均载荷分布最为平均，方案a和方案d中切刀所受水平载荷分布较为不平均;（4)总体上，在 贯人度分别为4 mm、6 mm、8 mm时，方案a的比能耗最小，方案b的比能耗最大，比能耗随贯人度的变化规律 并不明显;（5 )综合考虑，方案a最好，此方案已经在预切槽设备上初步试验，切削性能良好;（6 )本研究成果 可为隧道预切槽设备切刀的布置方式研究提供借鉴和参考。

Research purposes ： In order to study the cutting characteristics of pre - cutting machine witli diferent layout of tlie cutters，the finite element software was used and the simulation model of cutters breaking the rock witli four kinds of cutters , layouts was established. The process of multi - cutters , breaking the rock with different layout of the cutters was simulated. The horizontal load and the specific energy of cutters , breaking rock were analysed. Research conclusions ：( 1 ) The vertical resistance of the cutter is much less than the horizontal resistance when the cutters break therock. (2) At t!ie penetration of 6 mm，among the four kinds of cutters , layout，the average horizontal load of the cutter in scheme a which is 485 N is the minimum and the average horizontal load of the cutter in scheme d which is 548 N is the maximum. (3 ) The average horzontal loads of t!ie cutters in scheme b are the most even and the average horzontal loads of t!ie cutters in scheme a and scheme d are more uneven. (4) Overall，at the penetration of 4 mm，6 mm and 8 mm，the specific energy in scheme a is the minimum and the specific energy in scheme b is the maximum. The viration lawbetween the specific energy and the penetration is not obvious. (5) On the whole，scheme a is the best. This scheme has been initially tested on the pre - cutting machine and the cutting peformance was good. (6 ) The research results can provide references for the study of tunnel pre - cutting machine cutters , layout.