多采空区干式充填与带式胶结充填力学性能数值模拟研究  

Numerical Simulation of Mechanical Properties of Multi-goaf Dry Filling and Belt Cemented Filling

作　　者：缪玉松 黄飞飞 朱明德 李昱锦 王谦源[1] MIAO Yusong;HUANG Feifei;ZHU Mingde;LI Yujing;WANG Qianyuan(School of Science,Qingdao University of Technology,Qingdao 266525,China;Deep Mining Laboratory of Shandong Gold Group Co.,Ltd.,Laizhou 261442,China)

机构地区：[1]青岛理工大学理学院,山东青岛266525 [2]山东黄金集团有限公司深井开采实验室,山东莱州261442

出　　处：《金属矿山》2024年第6期46-52,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:52604004);山东省自然科学基金项目(编号:ZR2019BA023)。

摘　　要：针对某萤石矿多采空区的工程概况,采用充填法治理采空区过程中提出了带式胶结充填体结构,运用3DEC离散元软件进行数值模拟计算,以空场法下采场的力学性能为基准,对传统废石干式充填与带式胶结充填2种不同充填方式下采空区进行沉降位移场、塑性区、应力场分析。结果表明:空场法下5号矿房顶板与左侧间柱出现塑性区贯通现象,有顶板坍落,间柱溃倒的风险;传统废石干式充填下5号矿房顶板与左侧间柱塑性区面积大幅减少,但是由于废石自身重力作用顶板沉降量增加了12%;带式胶结充填下5号矿房顶板与左侧间柱塑性区仅零星分布于受拉应力较大的临空面,顶板沉降量下降了4.33%,5号矿房上下盘收敛位移较空场法下降了12%。研究表明在不考虑充填成本的情况下,采用带式胶结充填治理多采空区,具有更优良的效果。According to the general situation of multi-goaf project in a fluorite mine,a belt-type cemented backfill structure was proposed in the process of treating goaf by filling method.Numerical simulation calculation was carried out using 3DEC discrete element software,and mechanical properties of stope under open stope method were taken as reference.The subsidence displacement field,plastic zone and stress field of the goaf under the two different filling methods of traditional waste rock dry filling and belt cemented filling are analyzed.The results show that the plastic zone is through the roof plate and the left column of No.5 mine under the open stope method,and there is roof collapse,the risk of column collapse.The plastic area between the roof panel and the left column of No.5 mine is greatly reduced under the traditional waste rock dry filling,but the roof settlement increases by 12%due to the gravity of the waste rock itself.The plastic zone between the roof panel and the left intercolumn of No.5 mine is only scattered in the open surface with high tensile stress,the roof settlement decreases by 4.33%,and the convergence displacement of the upper and lower plate of No.5 mine room decreases by 12%compared with the open site method.The results show that,without considering the cost of filling,it is better to use belt cemented filling to treat the gob.

关 键 词：多采空区 干式充填 带式胶结充填 塑性区 数值模拟 

分 类 号：TD853.391[矿业工程—金属矿开采]