近几年来,随着煤矿开采深度的逐渐加深和国家对煤矿安全监管力度的不断加大,加强瓦斯抽放和先抽后采是确保煤矿安全的必然措施。液压坑道钻机则是承担这项任务的主要角色。钻杆作为钻机工作过程中的主要部件,受到轴向和径向等多方面的力,可以说钻杆的好坏直接影响到孔的成形。现有常用钻杆的类型最主要是圆柱形中空钻杆,可以应用 In recent years, with the gradual deepening of the depth of coal mining and national safety supervision of coal mines continue to increase, to strengthen gas drainage and pumping after pumping is an inevitable measure to ensure coal mine safety. Hydraulic tunnel rigs are the main players in this task. Drill rod as the main part of the drilling process, subject to axial and radial forces in many aspects, we can say that the quality of the drill pipe directly affects the formation of the hole. The most commonly used type of commonly used drill pipe cylindrical hollow drill pipe, can be applied