基于线性切割试验碴片分析的滚刀破岩效率研究

发布时间：2018-05-24 20:56

本文选题：TBM + 碴片　；参考：《隧道建设》2017年03期

【摘要】：为了研究碴片形状与TBM破岩效率之间的关系,应用机械破岩试验平台对北山花岗岩进行线性切割试验。通过对试验所形成的碴片进行粗糙度指数、扁平度以及长轴分析,发现不同滚刀间距及贯入度下所形成的碴片有很好的规律。TBM破岩效率越高,所形成的碴片大岩块的长轴更长,粗糙度指数更大,同时碴片也更加扁平。将粗糙度指数与比能进行回归分析,二者具有很好的线性关系。对于北山花岗岩,当刀间距与贯入度的比值为40左右时,TBM破岩效率最高。因此,碴片分析对评价TBM的破岩效率和优化施工具有重要意义。
[Abstract]:In order to study the relationship between the shape of the ballast and the rock breaking efficiency of TBM, the mechanical rock breaking test platform is applied to the linear cutting test of the Beishan granite. Through the roughness index, flat degree and long axis analysis of the ballast slices formed by the test, it is found that the ballast fragments formed under the different distance and penetration of the hob have a good law of breaking the rock. The higher the efficiency, the longer the long axis of the rock mass, the greater the roughness index, and the flatness of the ballast. The regression analysis between the roughness index and the ratio energy has a good linear relationship. For the Beishan granite, the TBM rock breaking efficiency is the highest when the ratio of the tool spacing to the penetration is about 40. Therefore, the analysis of the rock fragment is analyzed. It is of great significance to evaluate rock breaking efficiency and optimize construction of TBM.
【作者单位】：北京工业大学城市防灾与减灾教育部重点实验室;
【基金】：国家重点基础研究发展计划(“973”计划)项目(2014CB046900) 国家自然科学基金青年基金项目(51508010)
【分类号】：U455.3

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