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许一川¹  ,  周建伟²  ,  李    莹¹  ,  师永霞¹  ,  徐啸川³

( 1 .  河南省地质局生态环境地质服务中心 ，郑州 450053 ;  2.  川藏铁路有限公司 ，成都 610094 ;

3 .  中国地质大学（武汉） 工程学院 ，武汉 430074)

摘   要：为研究重复采动对顺层岩质边坡稳定性的影响，基于离散元的方法，利用 UDEC 软件建立二维数值模型，通过分析不同开采深厚比、不同开采位置边坡的力学特征，得出其力学响应机制。结果表明： 开采深厚比的变化对基底岩层影响十分显著，随着深厚比的减小，基底岩层位移不断增大，剪应力不断减小，垂直应力不断增大 ，层面抗剪强度降低，进而导致坡体稳定性降低；开采深厚比的减小 ，使陡崖岩体下沉，进而导致 软弱夹层位移量增大；当深厚比不同时 ，软弱夹层水平位移曲线变化规律大致相同，整体上均呈现“先增大后减小 ” 的变化趋势。研究可为顺层岩质边坡矿山的开采提供参考。

关键词：顺层岩质边坡 ；离散元 ；重复采动 ；稳定性

中图分类号：U416. 1 + 4           

文献标志码：A            

文章编号： 1005- 8249   (2025)  02- 0054- 06

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.010

 

XU Yichuan¹  ,  ZHOU Jianwei² ,  LI Ying¹  ,  SHI Yongxia¹  ,  XU Xiaochuan³

( 1 . Ecological Environment Geo - Service  Center of Henan  Geological Bureau ,  Zhengzhou 450053,  China;

2. Sichuan - Tibet Railway Co . ,  Ltd . , Chengdu 610094 ,  China;  3 . School  of Engineering , China

University of Geosciences  (Wuhan),  Wuhan 430074 ,  China)

Abstract：In order to study the effect of repeated mining on the stability of bedding rock slope, this paper uses UDEC software to establish a two-dimensional numerical model based on the discrete element method. Through analyzing the mechanical characteristics of the slope under different mining depth ratios and different mining positions, the mechanical response mechanism is obtained. The main conclusions of this paper are as follows: the change of mining depth ratio has a significant impact on the basement rock, and with the decrease of the depth ratio, The displacement of the basement rock stratum is increasing, the shear stress is decreasing, the vertical stress is increasing, and the shear strength of the layer is decreasing, which leads to the reduction of slope stability; The reduction of the mining depth ratio will cause the steep rock mass to sink, and then lead to the increase of the displacement of the weak interlayer; When the depth ratio is different, the horizontal displacement curve of the weak interlayer has the same change rule, and the overall trend is "increase first and then decrease"; This study can provide a reference for the mining of bedding rock slope mines.

Key words: bedding rock slope; discrete element; repeated mining; stability

基金项目： 国家自然科学基金项目  (51674099) 。

作者简介：许一川  (1988—) ,  男，硕士，高级工程师 ，研究方向：水工环地质。

通信作者：周建伟  (1983—) ,  男，本科，工程师 ，研究方向： 隧道桥梁。

收稿日期：2023 - 08 - 03