基于Flac^(3D)数值模拟的深部采场结构参数优化及应用  

Optimization and application of deep stope structural parameters based on Flac^(3D) numerical simulation

作　　者：周亚博 Zhou Yabo(Xilin Gol League Shanjin Alhada Mining Co.,Ltd.)

机构地区：[1]锡林郭勒盟山金阿尔哈达矿业有限公司

出　　处：《黄金》2022年第5期51-55,共5页Gold

基　　金：中国博士后科学基金面上项目(2021M702015,2021MD703874)。

摘　　要：针对阿尔哈达铅锌矿上向水平分层充填采矿法采场结构参数的确定开展相关研究,采用Flac^(3D)数值模拟软件建立了留顶柱不留底柱、留底柱不留顶柱共2种数值模型,分步模拟计算各方案在回采过程中的应力和位移分布规律,分别从拉应力和底板上鼓量、顶板下沉量分析比较方案的优缺点。研究结果表明:首采分层开挖后,2种方案采空区的顶底板均出现了拉应力集中,采空区两侧围岩出现压应力集中区域;留底柱不留顶柱的方案拉应力出现明显下降,仅为2.30 MPa左右,因此选择留底柱不留顶柱的方案作为阿尔哈达铅锌矿上向水平分层充填采矿法的采场结构布置形式。To determine the structural parameters of stope using upward horizontal slicing filling mining method in Alhada lead-zinc mine,related research is carried out.A total of 2 kinds of numerical models including reserving top pillar without sill pillar and reserving sill pillar without top pillar were built by Flac^(3D) numerical simulation software,the step-by-step simulation was used to calculate the stress and displacement distribution laws of each scheme in the recovery process,and the advantages and disadvantages of the schemes were analyzed and compared from the tensile stress,the upward swelling degree of floor and downward settling degree of roof,respectively.The results showed that tensile stress concentration occurred in the roof and floor of the goafs for both schemes after the first slicing excavation and the stress concentration occurred in wall rocks on both sides of the goaf;in the scheme of reserving sill pillar without top pillar,the tensile stress obviously declines to only around 2.30 MPa.So the scheme of reserving sill pillar without top pillar was selected as the stope structure layout form of upward horizontal slicing filling mining method in Alhada lead-zinc mine.

关 键 词：数值模拟 深部开采 采场结构参数 顶柱 底柱 充填采矿法 

分 类 号：TD853.34[矿业工程—金属矿开采]