多断层影响下采场巷道围岩移动规律试验  

Experimental Study on the Movement Law of Surrounding Rock in Mining Roadways Under the Influence of Multiple Faults

作　　者：赵沁彬 余伟健 郭涵潇 潘豹 齐耀斌 ZHAO Qinbin;YU Weijian;GUO Hanxiao;PAN Bao;QI Yaobin(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Coal Resources Clean-Utilization and Mine Environment Protection,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2024年第4期18-25,共8页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(52174076,52474096);湖南省自然科学基金资助项目(2023JJ30261);湖南省科技创新计划资助项目(2024RC1065)。

摘　　要：为探究采场巷道在2条断层影响下的稳定性,通过分析巷道顶板和两侧岩体的运动应力特性来进行研究.结合实际工程地质资料,设计并实施相似模拟试验,建立力学简化模型,对其进行理论分析.结果表明:巷道顶板的下沉量随着工作面的推进不断增大,当工作面推进到10~30 cm阶段时,顶板的下沉速率最快;在受断层影响区域,巷道顶板在竖直方向下沉不均匀,采场巷道向工作面歪斜,并且上顺槽顶板最大下沉量远大于下顺槽;巷道围岩煤柱应力分布不对称,巷道两帮变形不均匀,护巷煤柱出现塑性破坏;应力承载由采场岩体承载转变成断层外部应力支撑拱承载.In order to explore the stability of the mining roadway under the influence of two faults,the study is conducted by analyzing the dynamic stress characteristics of the roadway roof and the rock masses on both sides.It conducts similar simulation experiments based on actual engineering geological data and establishes a simplified mechanical model for theoretical analysis.When the mining roadway is arranged near a fault,the displacement of the roadway roof and the stress characteristics of the two sides of the roadway are monitored during the advancing process of the working face.Results show that the subsidence of the roadway roof continuously increases as the working face advances,and the subsidence rate of the roof is the fastest when the working face advances to 10 cm to 30 cm.In the area affected by faults,the roof of the roadway sinks unevenly in the vertical direction,and the roadway in the mining area tilts towards the working face.Additionally,the maximum subsidence of the roof in the upper groove is much greater than that in the lower groove.The stress distribution of the coal pillars in the surrounding rock of the tunnel is asymmetric,and the deformation of the two sides of the tunnel is uneven,resulting in plastic failure of the coal pillars for tunnel protection.The stress bearing is transformed from being carried by the rock mass in the mining area to being carried by the external stress support arch of the fault.

关 键 词：煤矿 巷道围岩 围岩变形 相似模拟 

分 类 号：TD323[矿业工程—矿井建设]