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許一川¹  ,  周建偉²  ,  李    瑩¹  ,  師永霞¹  ,  徐嘯川³

( 1 .  河南省地質局生態環境地質服務中心 ，鄭州 450053 ;  2.  川藏鐵路有限公司 ，成都 610094 ;

3 .  中國地質大學（武漢） 工程學院 ，武漢 430074)

摘   要：為研究重復采動對順層巖質邊坡穩定性的影響，基于離散元的方法，利用 UDEC 軟件建立二維數值模型，通過分析不同開采深厚比、不同開采位置邊坡的力學特征，得出其力學響應機制。結果表明： 開采深厚比的變化對基底巖層影響十分顯著，隨著深厚比的減小，基底巖層位移不斷增大，剪應力不斷減小，垂直應力不斷增大 ，層面抗剪強度降低，進而導致坡體穩定性降低；開采深厚比的減小 ，使陡崖巖體下沉，進而導致 軟弱夾層位移量增大；當深厚比不同時 ，軟弱夾層水平位移曲線變化規律大致相同，整體上均呈現“先增大后減小 ” 的變化趨勢。研究可為順層巖質邊坡礦山的開采提供參考。

關鍵詞：順層巖質邊坡 ；離散元 ；重復采動 ；穩定性

中圖分類號：U416. 1 + 4           

文獻標志碼：A            

文章編號： 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

基金項目： 國家自然科學基金項目  (51674099) 。

作者簡介：許一川  (1988—) ,  男，碩士，高級工程師 ，研究方向：水工環地質。

通信作者：周建偉  (1983—) ,  男，本科，工程師 ，研究方向： 隧道橋梁。

收稿日期：2023 - 08 - 03