胶结充填体作为人工矿柱常受到邻近矿房开采的爆破扰动，严重影响其稳定性。基于KCC(Karagozian and Case Concrete)本构模型和ALE(Arbitrary Lagrangian-Eulerian)流固耦合算法，采用LS-DYNA软件开展胶结充填体受邻近矿房爆破扰动的数值模拟研究，考虑不同边孔间距(0。6、1。2、1。8、2。4 m)及养护龄期(14、21、28 d)影响，揭示充填体中爆破波传播规律，探究爆破扰动对胶结充填体的动力响应及其失稳破坏情况。结果表明:邻近采场爆破对胶结充填体的破坏损伤主要集中在边界处，为提高矿石回收率并保证充填体安全，建议采用边孔间距1。2 m方案;矿山爆破开采中充填体至少需要养护21 d;低龄期充填体矿柱顶底部区域是整个矿柱中的薄弱部分，易发生失稳，应予以重点监测。
Numerical simulation study on dynamic response of backfill based on KCC model and ALE algorithm
The cemented filling material,as an artificial pillar,is often disturbed by blasting from adjacent mining rooms,seriously affecting its stability.Based on the KCC(Karagozian and Case concrete)constitutive model and ALE(Arbitrary Lagrangian-Eulerian)fluid structure coupling algorithm,LS-DYNA software was used to conduct numerical simulation research on the effect of adjacent mining room blasting disturbance on cemented backfill.The effects of dif-ferent side hole spacing(0.6,1.2,1.8,2.4 meters)and curing age(14 days,21 days,28 days)were considered to reveal the propagation law of blasting waves in the backfill,and to explore the dynamic response and instability failure of cemented backfill caused by blasting disturbance.The research results indicate that the damage to the cemented backfill caused by blasting in adjacent mining areas is mainly concentrated at the boundary.To increase the ore recovery rate and ensure the safety of the backfill,it is recommended to adopt a 1.2 m spacing scheme between side holes;At least 21 days of maintenance are required for the backfill in mining blasting and mining;The area at the top and bottom of the backfill pillar at a young age is the weak part of the entire pillar,which is prone to instability,which should be closely monitored.
万方数据
维普
