高放废物处置坑小直径盲井掘进机预选刀具破岩性能对比分析  

Comparative analysis of rock breaking performance based on preselected cutters of small-diameter blind shaft boring machine in highlevel radioactive waste disposal pit

作　　者：王鹏超 殷丽君[1] 龚秋明[1] 马洪素[2,3] 马函 WANG Pengchao;YIN Lijun;GONG Qiuming;MA Hongsu;MA Han(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China;CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste,Beijing 100029,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]核工业北京地质研究院,北京100029 [3]中国国家原子能机构高放废物地质处置创新中心,北京100029

出　　处：《世界核地质科学》2024年第4期792-804,共13页World Nuclear Geoscience

基　　金：中国国家原子能机构核设施退役治理专项(编号:科工二司[2020]194号)资助。

摘　　要：盲井掘进机是处置坑开挖的常用设备,刀具的合理设计与布置是其高效掘进的关键。北京工业大学TBM与盾构课题组针对北山高放废物处置坑小直径盲井掘进机预选了11英寸(279 mm)双排锥齿滚刀和双排镐齿滚刀两种刀型。本研究应用两种预选刀型对北山花岗岩试样进行线性切割破岩试验,对比分析两种刀型的滚刀力、破岩比能、岩片分布、振动特征和岩下损伤特性等指标。试验结果表明:锥齿滚刀在相同贯入度下的破岩法向力和振动强度小于镐齿滚刀,锥齿滚刀破岩效率整体上更高,并且锥齿滚刀破岩产生的贯通裂纹发育也更为显著。综合比较分析认为锥齿滚刀破岩性能更优,推荐采用预选的双排锥齿滚刀进行北山处置坑小直径盲井掘进机刀盘布置。本研究还可为盲井掘进机刀盘与推进系统设计及施工运行参数优化提供参考。Blind shaft boring machine is a common equipment for disposal pit excavation.Reasonable design and arrangement of roller cutter is the key to its efficient tunneling.The TBM and Shield Research Group of Beijing University of Technology preselected 11-inch double-row conical-shaped tooth roller cutter and double-row saddle-shaped tooth roller cutter for the small-diameter blind shaft boring machine in Beishan high-level radioactive waste disposal pit.In this study,two kinds of pre-selected cutters were used to carry out linear cutting rock breaking test on Beishan granite samples.The cutter force,rock breaking specific energy,rock chip distribution,vibration characteristics and rock damage characteristics of the two cutters were compared and analyzed.The test results show that the normal force and vibration strength of the rock breaking of the conical-shaped tooth roller cutter at the same penetration depth are smaller than those of the saddle-shaped tooth roller cutter,and the rock breaking efficiency of the conical-shaped tooth roller cutter is higher,and the development of the penetrating crack generated under the action of the conical-shaped tooth roller cutter is more significant.Comprehensive comparative analysis shows that the rock breaking performance of conical-shaped tooth roller cutter is better.It is recommended to use the pre-selected double-row conicalshaped tooth roller cutter to arrange the cutterhead of the small-diameter blind shaft boring machine in Beishan disposal pit.This study can also provide reference for the design of cutterhead and propulsion system of blind shaft boring machine and the optimization of construction and operation parameters.

关 键 词：锥齿滚刀 镐齿滚刀 小直径盲井掘进机 处置坑 北山花岗岩 

分 类 号：TU45[建筑科学—岩土工程]