基于PFC数值模拟的无底柱采场结构参数优化研究  

Study on Stope Structure Parameter Optimization of Sublevel Caving without Sill Pillar Based on Numeral Simulation with PFC

作　　者：刘志娜[1] 梅林芳[2] 宋卫东[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]武汉钢铁集团矿业有限责任公司大冶铁矿,湖北黄石市435006

出　　处：《矿业研究与开发》2008年第1期3-5,共3页Mining Research and Development

基　　金：教育部“新世纪优秀人才支持计划”资助项目(NCET-04-0102)

摘　　要：结合大冶铁矿东采车间工程条件，设计了几种无底柱采场结构参数，并运用PFC数值模拟软件，对多个采场结构方案进行模拟分析，根据各方案的矿石回收指标和现场实施的难易程度，推荐采用分段高度12m、进路间距15m、崩矿步距2．0-2．5m的最优采场结构参数组合。同时研究了放矿过程中不同阶段颗粒间接触力的变化规律，详细分析了数值模拟结果回收率偏高和贫化率偏低的原因。Based on the geological conditions in the east mining area of in Daye Iron Mine, several stoping schemes with different stope structure parameters for sublevel caving without sill pillar were designed, the several stoping schemes were simulated and analyzed by numeral simulation software PFC. According to the ore recovery indexes and the difficulty of field construction, the optimal one among candidate schemes was recommend, i. e. 12m sublevel height, 15m access space and 2.0 - 2.5m caving step space. Moreover, the changing rule of contact forces among particles in different stages during ore drawing was studied. The reasons why the ore recovery rate obtained from the numeral simulation is higher than actual one but the ore dilution rate obtained from the numeral simulation is lower than actual one were analyzed in detail.

关 键 词：无底柱分段崩落法 采场结构参数 数值模拟 PFC 

分 类 号：TD853.31[矿业工程—金属矿开采]