黄金
黃金
황금
GOLD JOURNAL
2014年
12期
37-40
,共4页
PFC2D%颗粒流%强度折减法%露天矿山%边坡稳定性%安全系数
PFC2D%顆粒流%彊度摺減法%露天礦山%邊坡穩定性%安全繫數
PFC2D%과립류%강도절감법%로천광산%변파은정성%안전계수
PFC2D%particle flow code%strength reduction factor%open pit mine%slope stability%safety coeffi-cient
基于颗粒流离散元理论,利用fish语言编写强度折减系数的函数对边坡稳定性进行研究。通过研究宏微观参数之间的关系,参照传统的强度折减法,对颗粒的平行连接强度和摩擦因数进行折减。在有明显位移时,以累计位移作为边坡失稳的判断标准;无明显位移时,以不平衡力与接触力之间的比率作为计算结束标准。结合马鞍山铁矿2号露天采场具体情况,分别采用PFC2 D软件和bishop法计算了其安全系数,其结果分别是3.874和5.564,并对2种方法产生差异的原因进行了分析,可为PFC2 D中实现强度折减法的改进提供参考。
基于顆粒流離散元理論,利用fish語言編寫彊度摺減繫數的函數對邊坡穩定性進行研究。通過研究宏微觀參數之間的關繫,參照傳統的彊度摺減法,對顆粒的平行連接彊度和摩抆因數進行摺減。在有明顯位移時,以纍計位移作為邊坡失穩的判斷標準;無明顯位移時,以不平衡力與接觸力之間的比率作為計算結束標準。結閤馬鞍山鐵礦2號露天採場具體情況,分彆採用PFC2 D軟件和bishop法計算瞭其安全繫數,其結果分彆是3.874和5.564,併對2種方法產生差異的原因進行瞭分析,可為PFC2 D中實現彊度摺減法的改進提供參攷。
기우과립류리산원이론,이용fish어언편사강도절감계수적함수대변파은정성진행연구。통과연구굉미관삼수지간적관계,삼조전통적강도절감법,대과립적평행련접강도화마찰인수진행절감。재유명현위이시,이루계위이작위변파실은적판단표준;무명현위이시,이불평형력여접촉력지간적비솔작위계산결속표준。결합마안산철광2호로천채장구체정황,분별채용PFC2 D연건화bishop법계산료기안전계수,기결과분별시3.874화5.564,병대2충방법산생차이적원인진행료분석,가위PFC2 D중실현강도절감법적개진제공삼고。
Based on the theory of particle flow code ,the paper wrote a program of strength reduction factors to an-alyze the stability of the slope with fish language .It studied the relationship between macro-parameters and micro-pa-rameters .Then referring to traditional strength reduction ,it decided to reduce parallel-bond strength and friction coeffi-cient.When the displacement was obvious ,the cumulative displacement would be the failure criterion of the slope .If the displacement was not obvious ,the specific ratio of average unbalanced mechanical force would be the failure crite-rion.Combining with No .2 open pit in Maanshan Iron Mine , it calculated the safety factors with PFC 2 D and Bishop method.And the safety factors were 3.874 and 5.564.At last,it analyzed the causes of the inconsistence and provided some research directions of improving strength reduction method in PFC 2D.