摘要
为研究深井矿山回采过程的结构稳定性,基于有限元离散控制方程,采用内加载模型模拟开挖与充填的力学效应,建立了回采过程模拟系统体系,提出了开挖与充填效应的模拟原理和开挖释放荷载的计算方法。以冬瓜山铜矿为例,通过对矿山地质开采条件的分析,确定开采方案,并对4步开挖过程进行了数值模拟。结果表明,矿山在第4步开挖后,在较大范围内产生极高拉应力集中,超过了岩体抗拉强度,容易发生大规模岩体破坏,为确保矿山安全高效开采,矿山应争取最早在第2步回采完毕、最迟在第3步回采完毕后进行充填。
Study on extraction process for deep mine structural stability, based on the finite element chscrete control equation, the load model in simulation of excavation and filling of the mechanical effect, the stoping process simu- lation system was established, and excavation and filling effect simulation principle and calculation method of exca- vation unloading was presented. Taken Dongguashan Copper Mine as an example, through the analysis of mine geo- logical mining conditions, the mining scheme, and the 4 steps excavation process numerical simulation were deter- mined. The results showed that after the fourth excavation, in the larger context of generating extremely high stress concentration, exceeded the rock tensile strength, easy occurrence of massive failure of rock mass. It＇s suggested that it＇s better to fill stoping in early second after stoping or in late third after stoping in order to ensure the safety and high-efficiency.
出处
《中国钼业》
2016年第2期16-20,共5页
China Molybdenum Industry
基金
国家高技术研究发展计划项目(863计划)(2011AA060407)
关键词
结构稳定性
有限元
回采过程
开挖
抗拉强度
structural stability
finite element discrete
stoping process
excavation
tensile strength
