CAJ | 학술논문

为了优化深部岩体中 TBM 刀盘滚刀的布置，提高 TBM 掘进效率，采用二维离散元软件UDEC分别研究了节理间距、倾角及贯入度对滚刀破岩的影响。研究结果表明：节理间距为50 mm时，裂纹均扩展到节理面，但节理面对裂纹的扩展有阻隔作用，不管节理的倾角如何，裂纹仍然沿着其倾斜的方向扩展；节理间距不大于100 mm时，岩石的裂纹可以扩展到节理面，节理对裂纹扩展起到控制作用；当节理间距不小于150 mm时，裂纹的扩展无法到达节理面，节理基本不影响裂纹扩展；对于水平节理，节理间距较小时，节理的存在不利于滚刀破岩，随着节理间距的增加，这种不利影响逐渐减弱、直至消失。节理倾角为30°时，由于节理倾角较小，节理间距的减小导致最优刀间距也在减小。节理倾角为60°时，节理间距越小越有利于滚刀的破岩。最佳贯入度随着节理倾角的变大存在逐渐上升的变化趋势，倾角0°变大至90°时，最佳贯入度从2 mm左右比较迅速地增大至7 mm左右。
위료우화심부암체중 TBM 도반곤도적포치，제고 TBM 굴진효솔，채용이유리산원연건UDEC분별연구료절리간거、경각급관입도대곤도파암적영향。연구결과표명：절리간거위50 mm시，렬문균확전도절리면，단절리면대렬문적확전유조격작용，불관절리적경각여하，렬문잉연연착기경사적방향확전；절리간거불대우100 mm시，암석적렬문가이확전도절리면，절리대렬문확전기도공제작용；당절리간거불소우150 mm시，렬문적확전무법도체절리면，절리기본불영향렬문확전；대우수평절리，절리간거교소시，절리적존재불리우곤도파암，수착절리간거적증가，저충불리영향축점감약、직지소실。절리경각위30°시，유우절리경각교소，절리간거적감소도치최우도간거야재감소。절리경각위60°시，절리간거월소월유리우곤도적파암。최가관입도수착절리경각적변대존재축점상승적변화추세，경각0°변대지90°시，최가관입도종2 mm좌우비교신속지증대지7 mm좌우。
In order to optimize the layout of TBM cutters on deep jointed rock and improve the effi-ciency of TBM, two-dimensional discrete element software UDEC has been used to research the impact of joint spacing, angle and the cutter spacing on the rock fragmentation. The results show that when the joint spacing is 50 mm, cracks extend to the joint surface and spread along the tilt direction despite the barrier effect and the various angle of joints;when the joint spacing is not more than 100 mm, the rock cracks can extend to the joints but the crack propagations is controlled by the joints; when the joint spacing is no less than 150 mm, joints have no impact on the break rocks because the propagation of <br> crack can’t reach the joints. When the spacing of horizontal joints is small, the joints will affect the rock fragmentation and the effects may gradually weaken until disappear with the increase of the joint spac-ing. The reducing joint spacing resulted in the best cutter spacing reduce when the small joint angle is 30° and the smaller joint spacing was better to break rock when the joint angle is 60°. The best penetra-tion rises gradually with the joint angle increasing and increase more quickly from 2 mm to 7 mm when the joint angle increases from 0° to 90°.