摘要
目的了解全断面岩石隧道掘进机滚刀破岩机理,优化滚刀结构,提高滚刀破岩效率,延长滚刀使用寿命,合理布置滚刀在刀盘上的分布.方法对滚刀切割岩石的过程进行了模拟,分析了不同岩石特性和切割力对岩石破碎区域和变形区域的影响.并通过岩石滚刀实验机对4种岩石进行了切割实验,证明了理论分析的正确性.结果在刀圈载荷一定的条件下,不同岩石由于其自身的极限应力、弹性模量和泊松比等特性不同,破碎区和变形区均不相同;作用在同种岩石上的载荷越大,岩石破碎区越大.结论岩石应力区域的大小与岩石自身泊松比成反比;岩石变形区域的大小与岩石自身弹性模量成反比.研究结果对于理解滚刀破岩机理,优化刀具系统的结构和提高掘进机工作效率具有重要意义.
The research aims to understand the rock breaking mechanism of the tunnel boring machine （TBM）, optimize the structure of disc cutter, improve the rock breaking efficiency, extend service life of disc cutter and decorate the distribution of disc cutter on Cutter Head. In this paper, the process of disc cutter cutting rock is simulated, and the effect of rock properties and cutting force on crush zone and deformation zone of the rock is analyzed. The cutting experiment of 4 rocks is conducted to prove the correctness of those theoretical analyses by a rock hob tester. The results show that, for the same cutter payload, the crush zone and the deformation zone occurred in different rocks are different because of their different ultimate stress, e- lastic modulus, and Poissons Ratio; the crush zone of the rock is proportional to the cutter payload. The conclusions show that the stress region of a rock is inversely proportional to its Poissons Ratio and the deforma- tion areas of a rock are inversely proportional to its elastic modulus. These results are very helpful for understanding rock breaking mechanism, optimizing the structure of disc cutter system of TBM and improving its working efficiency.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2012年第1期156-161,共6页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家十一五科技支撑计划重点项目(2007BAF09B01)
国家十二五科技支撑计划项目(2011BAJ02B05)
科技部科技人员服务于企业行动项目(2009GJB00025)
住房和城乡建设部科技项目(2010-K6-11)
辽宁省教育厅重点实验室基金项目(LS2010129)
全断面岩石掘进机刀具系统关键部件研究项目(LT2010087)
2010辽宁省科学技术计划项目(2010220040)
关键词
岩石特性
滚刀
掘进机
破岩机理
rock properties
disc cutter
TBM
rock breaking mechanism
