Deformation mechanism and treatment technology research of coal pillars in acute inclined goafs under expressway  

高速公路下伏急倾斜采空区煤柱变形机理及处治技术研究

作　　者：Bao Wei-Xing Ma Zhi-Wei Lai Hong-Peng Chen Rui 包卫星;马志伟;来弘鹏;陈锐(长安大学公路学院,陕西西安710064;中交第一公路勘察设计研究院有限公司,陕西西安710065)

机构地区：[1]School of Highway,Chang’an University,Xi’an,710064,Shaanxi Province,China [2]CCCC FIRST HIGHWAY CONSULTANTS CO.,LTD,Xi’an,710075,Shaanxi Province,China

出　　处：《Applied Geophysics》2025年第1期161-175,235,共16页应用地球物理(英文版)

基　　金：Science and Technology Major Project of Xinjiang Uygur Autonomous Region(2020A03003-7);Fundamental Research on Natural Science Program of Shaanxi Province(2021JM-180);Fundamental Research Funds for the Central Universities,CHD(Project for Leading Talents)(300102211302);Tianshan Cedar Plan of Science and Technology Department of Xinjiang Uygur Autonomous Region(2017XS13);Shaanxi Province Young Talent Lifting Program(CLGC202219).

摘　　要：When the expressway crosses the goafs inevitably,the design is generally to build the road on coal pillars as much as possible.However,the existing coal pillars are often unable to meet relevant requirements of highway construction.Combining three-dimensional physical model tests,numerical simulations and field monitoring,with the Urumqi East Second Ring Road passing through acute inclined goafs as a background,the deformation and failure mechanism of the overlying rock and coal pillars in acute inclined goafs under expressway load were studied.And in accordance with construction requirements of subgrade,comprehensive consideration of the deformation and instability mechanism of acute inclined goafs,the treatment measures and suggestions for this type of geological disasters were put forward.The research results confirmed the rationality of coal pillars in acute inclined goafs under the expressway through grouting.According to the ratio of diff erent overlying rock thickness to coal pillar height,the change trend and value of the required grouting range were summarized,which can provide reference for similar projects.高速公路不可避免地要穿越采空区时,工程设计思路一般是尽可能地将道路修筑在安全煤柱上,然而既有安全煤柱往往不能够满足公路建设的相关要求。结合三维物理模型试验、数值模拟和现场监测,以乌鲁木齐东二环道路穿越急倾斜煤层采空区路段为背景,研究了公路荷载作用下急倾斜采空区覆岩及安全煤柱的变形破坏机理,并针对公路路基施工要求,综合考虑急倾斜采空区变形及失稳机理,提出了该类地质灾害的处治措施和建议。研究结果从机理上证实了通过注浆治理高速公路下伏急倾斜采空区安全煤柱的合理性,并针对不同的覆岩厚度与煤柱高度的比值,总结了所需注浆范围的变化趋势及数值,可为类似工程提供参考和借鉴。

关 键 词：model test acute inclined goafs SUBGRADE deformation mechanism treatment technology 

分 类 号：P61[天文地球—矿床学]