Study of pressure distribution within the crushed zone in the contact area between rock and disc cutters
Study of pressure distribution within the crushed zone in the contact area between rock and disc cutters
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DOI：
10.1016/j.ijrmms.2012.07.031
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发表时间：
2013
影响因子：
7.2
通讯作者：
J. Rostami
中科院分区：
文献类型：
--
作者：
J. Rostami
估算切削岩石时作用在圆盘铣刀上的切削力已用于隧道掘进机 (TBM) 和各种其他机械挖掘机的刀盘设计和性能预测。切削力是圆盘铣刀和岩石表面之间接触区域的压力的结果。本文介绍了直接测量该接触区域压力的结果以及切割各种岩石类型时观察到的压力分布模式。结果表明，与之前模型假设的接触区尺寸相比，接触区内的压力更加集中，实际受压面积更小。测量还表明，在高度集中压力区的前面和后面的理论接触区内都存在无压力区域。这表明刀环内的峰值应力高于正常预期，并解释了现场观察到的各种盘形刀具的一些行为的原因。
Estimation of the cutting forces acting on a disc cutter while cutting rock has been used for cutterhead design and performance prediction of tunnel boring machines (TBMs) and various other mechanical excavators. The cutting forces are the result of the pressure in the contact area between the disc cutter and rock surface. This paper presents the result of direct measurement of pressure in this contact area and observed pressure distribution patterns when cutting various rock types. The results show that the pressure within the contact zone is more concentrated, and the actual pressurized area is smaller, than the size of the contact zone that has been assumed by previous models. The measurements also show that there are areas of no pressure within the theoretical contact zone both in front of the highly concentrated pressure zone and behind it. This indicates that the peak stresses within the cutter ring are higher than normally expected, and explains the reason for some observed behavior of various disc cutters in the field.