理论与试验研究

鞭梢块体结构特性对超低摩擦效应影响分析

  • 李利萍 ,
  • 李秋雨 ,
  • 潘一山 ,
  • 唐垒
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  • 1.辽宁工程技术大学 力学与工程学院,辽宁 阜新 123000;
    2.辽宁大学 环境学院,沈阳 110036;
    3.中安国泰(北京)科技发展有限公司,北京 100012
李利萍(1983—),女,安徽亳州人,博士,教授、博士生导师,主要从事深部岩体力学特性方面的教学与研究工作。E-mail:liliping@lntu.edu.cn

收稿日期: 2025-01-22

  网络出版日期: 2025-09-03

基金资助

国家自然科学基金(51974148);辽宁省“兴辽英才计划”项目(XLYC1807130)

Influence Analysis of the Structural Characteristics of Whip-Tip Block on the Ultra-Low Friction Effect

  • Li Liping ,
  • Li Qiuyu ,
  • Pan Yishan ,
  • Tang Lei
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  • 1. School of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, P.R. China;
    2. School of Environment, Liaoning University, Shenyang 110036, P.R. China;
    3. Zhongan Guotai (Beijing) Technology Development Co., Ltd., Beijing 100012, P.R. China

Received date: 2025-01-22

  Online published: 2025-09-03

摘要

开采扰动下深部岩体动力响应与地震作用下高层建筑“鞭梢效应”极为相似,将鞭梢结构引入岩体超低摩擦效应研究,建立鞭梢块体超低摩擦效应模型,研究其结构特性对超低摩擦效应的影响。利用自主研制的超低摩擦效应实验装置,通过改变鞭梢块体尺寸、位置、高宽比结构特性参数,分析鞭梢块体水平位移大小,得到结构特性参数对超低摩擦效应影响规律。结果表明:不同工况下鞭梢块体水平位移时程曲线均具有两阶段特征;鞭梢块体尺寸增大,水平位移降低,超低摩擦效应减弱;垂直扰动作用下,鞭梢块体超低摩擦效应随其位置远离扰动源呈增大趋势,高宽比存在超低摩擦效应显著影响区间。

本文引用格式

李利萍 , 李秋雨 , 潘一山 , 唐垒 . 鞭梢块体结构特性对超低摩擦效应影响分析[J]. 地下空间与工程学报, 2025 , 21(4) : 1278 -1285 . DOI: 10.20174/j.JUSE.2025.04.19

Abstract

The dynamic response of a deep rock body under mining disturbance is very similar to that of a high-rise building under seismic action, and the whip-tip structure is introduced into the study of the rock body's ultra-low friction effect. The model of the ultra-low friction effect of the whip-tip block is established, and the influence of its structural characteristics on the ultra-low friction effect is studied. The horizontal displacement size of the whipping block by changing the size, position, and aspect ratio of the whipping block was analyzed by using the self-developed experimental device of ultra-low friction effect, and the influence law of the structural characteristic parameters on the ultra-low friction effect was obtained. The results show that: The horizontal displacement time course curves of the whipping tip block under different working conditions are characterized by two stages; The whipping tip block size increases, the horizontal displacement decreases, and the ultra-low friction effect is weakened; Under the effect of vertical perturbation, the ultra-low friction effect of the whip-tip block tends to increase with its position away from the source of perturbation, and there is an interval of significant influence of the ultra-low friction effect on the height-to-width ratio.

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