上向分层回采采场稳定性数值模拟研究  

Numerical Simulation of the Stope Stability by Upward Horizontal Slice Mining

作　　者：刘晓明[1] 罗周全[1] 张保[1] 李畅[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《矿冶工程》2009年第4期10-13,共4页Mining and Metallurgical Engineering

基　　金："十一五"国家科技支撑计划课题(2007BAK22B04-12;2006BAB02B05-3-1);中南大学研究生学位论文创新基金

摘　　要：根据凡口铅锌矿不同采场顶板围岩条件,分别建立了典型采场模型Ⅰ(采场顶板为矿体)和模型Ⅱ(采场顶板为充填体),采用有限元分别对两模型上向水平分层充填回采的整个过程进行了分步模拟,获得了开挖过程中采场顶底板、侧壁的应力分布及位移变化情况,对比分析了不同采场顶板围岩条件下分层开采对采场稳定性的影响。研究表明,采场顶板为充填体的采场回采过程中应力、位移变化量均大于采场顶板为矿体的采场。因此,为确保安全回采,回采后期必须做好顶板支护工作。研究结果为优化采场结构参数和指导地压控制提供了可靠的理论依据。According to the different wall-rock condition adjacent to the stope roof in Fankou Lead-zinc Mine, typical stope model Ⅰ and model Ⅱ were established. Numerical simulation was done separately with the finite element method for the entire process of upward horizontal stoping and filling by two models. The stress distribution and the change in the displacement of the stope floor, roof and sidewall in the course of mining were obtained. Comparative analysis was done on the influence of slice mining on the stope stability under different wall-rock condition adjacent to stope roof. Research indicates that the variable quantity of stress and displacement in model Ⅱ are all bigger than that in model Ⅰ. Therefore, roof supports and protecting measures must be taken to ensure safe stoping. The findings have provided a reliable theory basis for optimizing stope design parameters and instructing geostatic pressure control.

关 键 词：有限元法 上向水平分层充填采矿法 Phase2 稳定性 数值模拟 

分 类 号：P208[天文地球—地图制图学与地理信息工程] O242.1[天文地球—测绘科学与技术]