In order to explore the influence of different parameters of prefabricated perforations on rock breaking by tunnel boring machine(TBM)cutter head,rock intrusion tests were carried out on rock-like specimens with different angles,hole spacing and row spacing of prefabricated perforations,and the change rules of intrusion difficulty coefficient,peak intrusion force and intrusion force energy consumption of sepecimens with different prefabricated perforations were analyzed.The results show that the spacing between rows of prefabricated perforations changes from 3 cm to 5 cm,and the intrusion difficulty coefficient,peak intrusion force and intrusion force energy consumption of the specimens increase gradually.As the spacing between holes changes from 1 cm to 3 cm,the intrusion difficulty coefficient,peak intrusion force and intrusion force energy consumption of the specimens increase gradually.When the angle of prefabricated perforation changes from 45° to 90°,the intrusion difficulty coefficient,peak intrusion force and intrusion force energy consumption decrease first and then increase.When the angle of perforations is 60°,the intrusion difficulty coefficient,peak intrusion force and intrusion force energy consumption are the least.
关键词
隧道掘进机/辅助破岩/预制射孔/侵岩试验/侵入难度系数
Key words
Tunnel boring machine/Auxiliary rock breaking/Prefabricated perforation/Rock intrusion test/Intrusion difficulty coefficient
维普
万方数据