长壁工作面条件下超高水充填技术研究——以四川某磷矿为例  

Study on long wall filling mining technology with ultra-high water material-a case study of a phosphate mine in Sichuan

作　　者：周成 邓涛[1] 段峰 苏毅 刘达 廖元欢 张成良[1] Zhou Cheng;Deng Tao;Duan Feng;Su Yi;Liu Da;Liao Yuanhuan;Zhang Chengliang(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Sichuan Fazhan Tianrui Mining Co.,Ltd.,Leshan Sichuan 614600,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]四川发展天瑞矿业有限公司,四川乐山614600

出　　处：《化工矿物与加工》2023年第9期66-71,共6页Industrial Minerals & Processing

基　　金：四川省应用基础研究项目(2020YFS0545)。

摘　　要：为了解决缓倾斜、薄至中厚磷矿体开采技术难题,将在煤矿中应用相对成熟的超高水充填开采技术运用到磷矿开采中,并对此进行了可行性论证。以四川某磷矿为研究对象,利用室内单轴、直剪试验测定超高水材料充填体在不同水灰比(5∶1、6∶1、7∶1)及各龄期下的物理力学参数,运用FLAC^(3D)有限元数值模拟软件建立采场模型,模拟分析了不同水灰比下超高水材料充填体的覆岩承载效果,研究结果表明:超高水材料充填体在养护7 d时可达到最终强度的80%;在养护28 d内,各配比下的充填体强度呈对数曲线上升,直至达到最终强度;当预留矿柱间距为4 m时,3种配比充填方案均能有效提高采场稳定性。In order to solve the technical problems during the mining of phosphate ore bodies with gentle slope and thin to medium thickness,the ultra-high water filling mining technology applied in coal mines successfully was managed to be used for mining operation in phosphate mines,and the feasibility has been demonstrated.Taking a phosphate mine in Sichuan as the research object,indoor uniaxial and direct shear experiments were carried out to determine the physical and mechanical parameters of the ultra-high water material based fill mass at different water-lime ratios(5:1,6:1,7:1)and different ages.The FLAC3D finite element numerical simulation software was employed to construct the stope model so as to study the overburden bearing capacity of the ultra-high water material based fill mass at different water-lime ratios.The research results show that the strength of fill mass based on ultra-high water material after 7 days of curing can reach 80%of the ultimate strength.Within 28 days of curing period,the strength of the fill mass at different ratios increased along a logarithmic curve until it reached the final strength.When the spacing of reserved pillars was 4 m,the filling programs performed at three ratios facilitated improvement of the stope stability.

关 键 词：超高水材料 稳定性分析 单轴抗压强度 采空区充填 FLAC 3D 矿柱 

分 类 号：TD871[矿业工程—非金属矿开采]