Comparative Study on Rock Breaking Performances by Arc and Wedge TBM Hob with Two Blades
Comparative Study on Rock Breaking Performances by Arc and Wedge TBM Hob with Two Blades
复制标题
DOI：
10.1007/s10706-021-01785-0
复制
发表时间：
2021-03
影响因子：
1.7
通讯作者：
Xuhui Zhang;Junjie Wu-;Dingbang Hu;Miaolei He;Yi-min Xia
中科院分区：
文献类型：
--
作者：
Xuhui Zhang;Junjie Wu-;Dingbang Hu;Miaolei He;Yi-min Xia
为了比较圆弧滚刀和楔形滚刀的破岩性能，建立了双滚刀刀面岩石切削模型，并基于颗粒流程序进行了一系列的岩石切削模拟。同时，对岩石破碎过程、裂纹扩展规律、岩石切削力和岩石切削效率等进行了研究。结果表明，圆弧刃的破岩面积和侧向裂纹长度远大于楔形刃。圆弧刀片和楔形刀片的最佳切削间距分别为60 mm和30 mm。研究结果表明，与圆弧刀片相比，楔形刀片能显著降低岩石切削力，提高岩石切削效率，为隧道掘进机在硬岩巷道掘进中的应用提供了参考。
To compare the rock breaking performances caused by the arc and wedge hob with two blades, a rock cutting model with two hob blades is established and a series of rock cutting simulations are performed based on the particle flow code. Meanwhile, the rock breaking process, crack extension pattern, rock cutting force and rock cutting efficiency etc. are investigated in this study. The results present that the rock breaking area and the lateral crack length induced by the arc blades is much greater than that induced by the wedge blades. The optimal cutting spacing of the arc and wedge blades is 60 mm and 30 mm respectively. It confirms that the wedge blades can significantly reduce the rock cutting force and raise the rock cutting efficiency compared with the arc blades, which can provide a reference for the hard rock tunneling by the tunnel boring machine.