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我国北山高放废物处置坑拟采用小直径盲井掘进机开挖，而边缘滚刀作为掘进机控制成洞精度和最易损耗的关键部件，其合理设计与布置是实现高放废物处置坑高效开挖的前提。应用小直径盲井掘进机预选的11英寸（279 mm）圆刃盘形滚刀，针对北山花岗岩开展边缘滚刀线性切割破岩试验研究，分析不同贯入度、安装倾角下的边缘滚刀破岩过程及滚刀振动特征。试验结果表明：相同贯入度下，20°安装倾角滚刀的平均法向力总体较大，侧向力较小，但平均滚动力两滚刀较为接近。相同贯入度下，不同安装倾角滚刀破岩时的三轴振动加速度平均峰值均以侧向加速度最大，法向次之，切向最小；安装倾角越大，滚刀三轴振动加速度的差异越大，侧向振动强度越大，且侧向高幅值振动的频率越高；随贯入度的增加边缘滚刀的三轴振动加速度均增大，且滚刀破岩中强振动的频次增大，贯入度对边缘滚刀侧向振动加速度的影响比法向及切向更为显著。本研究还可为小直径盲井掘进机刀盘优化布置提供参考。
Abstract：The Beishan high-level radioactive waste disposal pit in China is planned to be excavated by a small-diameter blind shaft boring machine,and the gage cutter is the key component of the boring machine to control the accuracy of the hole and the most vulnerable to loss. Its reasonable design and layout are the premise to realize the efficient excavation of the high-level radioactive waste disposal pit. In this paper, the linear cutting test of gage cutter is carried out for Beishan granite by using 11 inch round edge cutter preselected by small diameter blind shaft boring machine. The rock breaking process and vibration characteristics of gage cutter under different penetration depth and installation angle are analyzed. The test results show that under the same penetration depth, the average normal force of the 20° installation angle cutter is generally larger, the lateral force is smaller, but the average rolling force of the two cutters are closer. Under the same penetration depth, the average peak value of triaxial vibration acceleration of gage cutters with different installation angles is the largest in the lateral vibration acceleration, followed by the normal vibration acceleration and the tangential vibration acceleration. The larger the installation angle, the greater the difference in the triaxial vibration acceleration of the gage cutters,the greater the lateral vibration intensity, and the higher the frequency of the lateral high-amplitude vibration. With the increase of penetration depth,the triaxial vibration acceleration of the gage cutter increases,and the frequency of strong vibration in the rock breaking of the gage cutter increases. The influence of penetration depth on the lateral vibration acceleration of the gage cutter is more significant than that in the normal and tangential vibration accelerations. This study can also provide a reference for the optimal layout of the cutterhead of smalldiameter blind shaft boring machine.
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基本信息:
DOI：
中图分类号:TU45
引用信息:
[1]马函,殷丽君,龚秋明等.基于线性破岩试验的小直径盲井掘进机边缘滚刀破岩振动特征分析[J].世界核地质科学,2025,42(02):329-342.
基金信息:
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~~