沿空留巷动压区大直径锚索强支护数值模拟分析  

Numerical Simulation Analysis of Strong Support with Large Diameter Anchor Cable in Dynamic Pressure Zone of Gob-side Entry Retaining

作　　者：蒋恒 巩志力 徐学锋[2] 李宝富[2] JIANG Heng;GONG Zhili;XU Xuefeng;LI Baofu(Juji Coal Mine of Henan Longyu Energy Co.,Ltd.,Yongcheng 476600,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南龙宇能源股份有限公司车集煤矿,河南永城476600 [2]河南理工大学能源科学与工程学院,河南焦作454000

出　　处：《煤炭技术》2024年第7期32-36,共5页Coal Technology

基　　金：国家自然科学基金项目(51874121)。

摘　　要：为确保车集煤矿高矿压工作面沿空留巷支护效果,结合工作面实际生产地质条件,采用FLAC^(3D)方法,开展数值模拟,为动压区大直径锚索主动支护方案提供依据。首先分析巷道开挖无支护条件下的围岩应力、位移、塑性破坏区的分布及变化规律;然后分析在支护条件下,2611下巷靠近工作面回采侧采用切顶卸压(切顶10 m)沿空留巷过程中采场矿压显现规律;最后分析采空区上覆岩层稳定过程中,2611下巷超前支护区、沿空留巷段围岩中的应力、塑性破坏区、位移变化和分布规律,为大直径锚索加强主动支护替代单体支护的可靠性提供依据。In order to ensure the supporting effect of goaf retaining roadway in Juji coal mine high mine pressure working face,combined with the actual production geological conditions of the working face,numerical simulation was carried out by using FLAC^(3D) method to provide a basis for the largediameter anchor cable active support scheme in dynamic pressure area.Firstly,the distribution and variation of stress,displacement and plastic failure zone of surrounding rock are analyzed under the condition of excavation without support.Then,under the support condition,the mining pressure development law of stope is analyzed in the process of goaf retention in the lower lane 2611 near the working face by cutting the top and relieving the pressure(cutting the top 10 m).Finally,the stress,plastic failure zone and displacement change and distribution law of the surrounding rock in advance support zone and goaf retaining section of lower roadway 2611 are analyzed during the process of stability of overlying strata in goaf.These laws have been verified in field experiments,which provides a basis for the reliability of large-diameter anchor cable reinforcement active support instead of monomer support.

关 键 词：沿空留巷 动压区 强支护 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]