[1]翟淑芳,曹世豪,冯 永,等.断续节理岩体的TBM滚刀破岩机理研究[J].郑州大学学报(工学版),2020,41(01):20-24.
 The influence of intermittent joint on rock fragmentation by TBM cutter[J].Journal of Zhengzhou University (Engineering Science),2020,41(01):20-24.
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断续节理岩体的TBM滚刀破岩机理研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41
期数:
2020年01期
页码:
20-24
栏目:
出版日期:
2020-03-10

文章信息/Info

Title:
The influence of intermittent joint on rock fragmentation by TBM cutter
作者:
翟淑芳曹世豪冯 永高 萌
关键词:
广义粒子动力学(GPD)TBM 断续节理倾角
Keywords:
general particle dynamic(GPD)TBMintermittent jointincliantion an
文献标志码:
A
摘要:
为了推广全断面隧道掘进机(TBM)(TBM)在节理发育地层中的应用,研究断续节理地质条件下 TBM 滚刀的破岩过程、破岩模式及效率具有重要意义。 采用一种新的无网格数值模拟方法即广义粒子动力学(GPD)法,研究断续节理倾角的变化对滚刀破岩模式及效率的影响。 结果表明:对含单根断续节理的 岩体,节理尖端越靠近加载面,同时越靠近滚刀加载位置时,节理对中央裂纹和破岩深度的抑制作用越 大;断续节理倾角对破岩效率的影响不同于连续节理,滚刀切入率P75°<P0° <P90° <P30°<P60° < P45° <P15° ,即按照此顺序破岩难度逐渐减小。
Abstract:
A new meshfree numerical method, which is known as general particle dynamics (GPD) , is introduced to investigate the process of rock fragmentation by TBM cutter. The effects of inclination angle and length of intermittent joint on the pattern and efficiency of rock fragmentation have been studied. T he conclusions are summarized as follows : ①The initiation patterns of crack at intermittent joint are classified into three types: the crack is initiated at the centre of joint and propagates upward s the crack is initiated from the lower tip of joint and propagates downward s the crack is initiated from the upper tip of joint and propagates upward s ②The length of median cracks and the depth of rock fragmentation are related to the endpoints of intermittent joint. When the location of endpoints is more close to the loading surface and loading point, the madian cracks and the depth of rock fragmentation are more obviously restrain.③The depth of rock fragmentation decreases with increasing the intermittent joint length, and the depth of rock fragmentation remains constant when the length of joint is greater than a critical value.④Relationship between cutter cut rate and the length of joint can be expressed by ,which P75°
更新日期/Last Update: 2020-02-22