不同贯入度对掘进机滚刀破岩效率的影响  

Influence of Penetration on the Rock-Breaking Efficiency of a TBM Cutter

作　　者：龚秋明[1] 何冠文 赵晓豹[2] 张浩[1] 苗崇通 姚羲和 李晓昭[2] 

机构地区：[1]北京工业大学城市防灾与减灾教育部重点实验室,北京100124 [2]南京大学华东有色地勘局地下空间与地质环境研究所,南京210093

出　　处：《现代隧道技术》2016年第1期62-68,共7页Modern Tunnelling Technology

基　　金：国防科技重点项目(科工二司[2012]491号);国防科技重点项目(科工二司[2012]492号)

摘　　要：为了研究不同贯入度对破岩效率的影响,应用机械破岩试验平台,安装17英寸（432 mm）的常切面盘形滚刀,选取80 mm的滚刀间距,以0.5 mm为间隔,从0.5~3.5 mm分7个不同级次的贯入度对北山花岗岩进行线性切割试验,试样长×宽×高分别为1 000 mm×1 000 mm×600 mm。试验中记录滚刀的三向力并分层收集岩片,从平均法向力、平均滚动力、比能、岩片块度及形状的变化,分析了贯入度对滚刀破岩效率的影响,总结了滚刀在切割试验岩样时贯入度对滚刀力的影响规律。研究结果表明,当贯入度增加到一定的程度后单纯地增加贯入度并不能无限地提高破岩效率。To study the influence of penetration on the rock-breaking efficiency of a TBM cutter, a linear cutting test was carried out for Beishan granite utilizing a mechanical rock-breaking test platform and 17-inch disc cutters with a constant cross section and an 80 mm spacing, during which the penetration was divided into 7 grades from 0.5 mm to 3.5 mm at an interval of 0.5 mm and the sample was 1 000 mm×1000 mm×600mm. Through the test, the three-directional force applied on the cutter was recorded; the rock chips were collected layer by layer; the influ- ence of penetration on rock-breaking efficiency was analyzed based on the variation of the mean normal force, mean rolling force, specific energy, lumpiness and shape of the rock chips; and the influence of penetration on the cutter force was given as well. The results show that rock-breaking efficiency will no longer be improved when the penetra- tion increases to a certain degree.

关 键 词：掘进机 盘形滚刀 贯入度 滚刀破岩试验 滚刀力 比能 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]