Chakeri Hamid, Darbor Mohammad, Shakeri Hadi, Mousapour Hamid, Mohajeri Vahid
Department of Mining Engineering, Sahand University of Technology, Tabriz, Iran.
Heliyon. 2024 Aug 29;10(17):e37148. doi: 10.1016/j.heliyon.2024.e37148. eCollection 2024 Sep 15.
One of the essential and practical issues on TBM performance is the wear during the excavation process of abrasive and resistant rock. The wear of the disc cutter, which is caused by the gradual and uniform reduction of the diameter of the disc cutter, is caused by the rock-machine interaction during excavation, and various factors can intensify this phenomenon and reduce the wear life of the disc cutter. To obtain a proper view of the relationship between the operating parameters of the excavation machine and the disc cutter wear, a new laboratory device has been designed and built in the mechanized excavation laboratory of the Sahand University of Technology. By using this device, the amount of wear of cutting tools in excavation machines can be obtained against rough rock samples, and from the results, the amount of wear of cutting tools of excavation machines can be minimized so that the efficiency of the excavation machine can be increased. In the current research, the laboratory wear results obtained from this device have been compared with those obtained from the numerical modelling of the same device in PFC3D discrete element software, both for the cutting blades and the sample itself. This research showed that in the first abrasion stage of the sample, the difference in the abrasion weight of the experimental study and numerical modelling for the samples varies from 0.91 to 0.768 g, and the average is 0.202 g. Also, the difference between the abrasion percentage of laboratory study and numerical simulation for the samples varies from 6 to 14 %, and the average is 10 %. In step 2 of abrasion, the difference in the abrasion weight of the experimental study and numerical modelling for the samples varies from 0.118 to 0.556 g, and the average is 0.278 g. Also, the difference in the abrasion percentage of laboratory study and numerical simulation for the samples varies from 7 to 14 %, and the average is 11 %. The results of the new tunnel boring machine laboratory simulator revealed insights into wear behavior during different stages of excavation.
全断面隧道掘进机（TBM）性能方面的一个基本且实际的问题是在开挖磨蚀性和坚硬岩石过程中的磨损。盘形滚刀的磨损是由于开挖过程中岩石与机器相互作用导致盘形滚刀直径逐渐均匀减小引起的，各种因素会加剧这种现象并缩短盘形滚刀的磨损寿命。为了正确了解开挖设备的运行参数与盘形滚刀磨损之间的关系，在萨汉德科技大学的机械化开挖实验室设计并制造了一种新的实验室装置。通过使用该装置，可以获得开挖设备中刀具相对于粗糙岩石样本的磨损量，并且根据结果可以使开挖设备刀具的磨损量最小化，从而提高开挖设备的效率。在当前的研究中，将从该装置获得的实验室磨损结果与在PFC3D离散元软件中对同一装置进行数值模拟得到的结果进行了比较，包括切割刀片和样本本身。该研究表明，在样本的第一磨损阶段，样本的实验研究与数值模拟的磨损重量差异在0.91至0.768克之间，平均值为0.202克。此外，样本的实验室研究与数值模拟的磨损百分比差异在6％至14％之间，平均值为10％。在磨损的第二步中，样本的实验研究与数值模拟的磨损重量差异在0.118至0.556克之间，平均值为0.278克。此外，样本的实验室研究与数值模拟的磨损百分比差异在7％至14％之间，平均值为11％。新型隧道掘进机实验室模拟器的结果揭示了开挖不同阶段的磨损行为。
