无底柱分段崩落采矿法地压显现规律数值模拟分析  

Numerical simulation analysis of ground pressure appearance laws of pillarless sublevel caving method

作　　者：童玉升 李士超 王攀 陈宜华 Tong Yusheng;Li Shichao;Wang Pan;Chen Yihua(Xiadian Gold Mine,Zhaojin Mining Industry Co.,Ltd.;Changsha Mining Research Institute Co.,Ltd.;School of Energy and Environment,Anhui University of Technology)

机构地区：[1]招金矿业股份有限公司夏甸金矿,265414 [2]长沙矿山研究院有限责任公司 [3]安徽工业大学能源与环境学院

出　　处：《黄金》2022年第6期32-34,44,共4页Gold

基　　金：国家重点研发计划项目(2016YFC0801605)。

摘　　要：夏甸金矿主要采用无底柱分段崩落采矿法对厚大矿体进行开采,随着开采深度增加,采场地压逐渐增大,且矿岩属性较易因开采扰动发生次生应力场变化,导致地压灾害产生。基于Flac^(3D)软件对深部采场地压活动进行数值模拟,分析采场地压变化规律。数值模拟结果表明:无底柱分段崩落采矿法采场回采进路中顶底板水平应力较大,两帮垂直应力较大;在靠近回采工作面处的顶板中水平应力出现集中;相邻进路之间应力会出现转移。回采过程中需要对采场顶板进行水平应力监测,回采进路时要注意对相邻进路进行应力监测。The Xiadian Gold Mine mainly mines thick and large ore bodies by pillarless sublevel caving method.As the mining depth increases, the ground pressure increases gradually, and the mineral properties are more susceptible to secondary stress field changes due to extraction perturbations, leading to ground pressure disasters.Based on Flac^(3D)software to numerically model the activity of deep stope ground pressure, the law of stope ground pressure change is analyzed.Numerical simulation results showed that the horizontal stress of roof and floor was larger and the vertical stress of two sides was larger in the recovery access of pillarless sublevel caving method;horizontal stress appears concentrated in roof close to the extraction working surface;stress transfer in adjacent accesses occur.Horizontal stress monitoring of the roof of the stope is required during recovery process, and the stress should be monitored on the adjacent access when one access is recovered.

关 键 词：无底柱分段崩落采矿法 Flac^(3D)软件 数值模拟 应力分布 地压规律 地压监测 

分 类 号：TD853.36[矿业工程—金属矿开采]