缓倾斜多层矿体叠跨空区顶板应力分析  

Analysis of Roof Stress in Overlapped Goaf of the Gently Inclined Multi-layer Ore Body

作　　者：池秀文[1,2] 邓学翰 柴志杰 CHI Xiuwen;DENG Xuehan;CHAI Zhijie(Key Laboratory of Mineral Resources Processing and Environment of Hubei Province,Province,Wuhan,Hubei 430070,China;School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [2]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《矿业研究与开发》2022年第8期66-71,共6页Mining Research and Development

基　　金：国家自然科学基金项目(51874218);国家十三五重点研发计划项目(2018YFC0604401)。

摘　　要：在缓倾斜多层矿体的开采过程中,往往会形成大量的采空区,且采空区在空间上呈错落分布。此时,叠跨空区顶板的重叠率和稳定性是影响采场稳定的关键性因素。根据梁模型理论和叠加原理,建立叠跨空区顶板应力力学模型,分析不同空区重叠率下叠跨空区顶板的应力分布规律,得出叠跨空区顶板稳定极限状态。以上横山矿区钒矿段为例,分析叠跨空区顶板应力分布随空区重叠率变化的关系。结果表明,当空区重叠率逐渐降低,叠跨空区顶板内的最大主应力值逐渐减小,最大剪应力值逐渐增大;当V8矿体与V11矿体的空区重叠率减小至40%~48%时,叠跨空区顶板发生剪切破坏而失稳。In the process of mining gently inclined multi-layer ore bodies,a large number of goafs are often formed,which are distributed in a staggered manner in space.At this time,the overlapping rate and the roof stability of overlapped goaf are the key factors affecting the stope stability.According to the beam model theory and overlapping principle,the roof stress mechanics model of the overlapped goaf was established,the roof stress distribution law of overlapped goaf under different overlapping rates was analyzed,and the limit state of roof stability in the overlapped goaf was obtained.Taking the vanadium ore section of the Shanghengshan mining area as an example,the relationship between the roof stress distribution and the overlapping rate of goafs was analyzed.The results show that when the overlapping rate of the goafs decreases gradually,the maximum principal stress decreases gradually and the maximum shear stress increases gradually at the roof.When the overlapping rate of V8 ore body and V11 ore body decreases to 40%-48%,the roof of overlapped goaf occurs shear failure and becomes unstable.

关 键 词：多层矿 叠跨空区 顶板应力 顶板稳定性 

分 类 号：TD327.2[矿业工程—矿井建设]