莱新铁矿六边形采场结构的可行性分析  

Analysis on stability of hexagonal mining room in laixin ore mine

作　　者：刘新强[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《辽宁工程技术大学学报（自然科学版）》2010年第1期28-31,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家"十五"科技攻关基金资助项目(2001BA609A-10)

摘　　要：为了有效解决莱新铁矿复杂地质条件下、矿岩破碎、裂隙水发育矿体开采问题。提出了六边形采场结构阶段充填采矿方法,并应用2D–σ数值分析系统对其采场结构稳定性进行分析。分析结果表明,六边形采场结构与矩形采场结构相比,能够较好地适应应力转移规律;对六边形采场结构不同结构参数下的应力分布、变形特征及塑性区大小等进行了数值分析。六边形采场结构是一种稳定结构;在莱新铁矿的模拟过程中,其采场围岩及充填体未出现较大拉应力和塑性区,证明该方法在莱新铁矿的可行性;并提出了该方法在莱新铁矿应用的最佳结构参数,该方法对类似条件矿山开采具有参考价值。Because of complex geological conditions, fragmentation of ore and rockmass, developmental underground water, Laixin Iron mine is one of difficult excavation mine in China. The groundpress is mainly tensile stress destruction in the roof and its roof falling occurred frequently, which is caused by severely self-weight stress. By analyzing to compare the hexagonal mining room and rectangle--shaped mining room, we found that hexagonal mining room can adapt to stress transferring law. Based on the stress transferring law, a new mining room structural style was provided --hexagonal mining room. Numerical analysis on stoping, ground pressure activity, tensile stress of roof and distribution of plastic zone of the hexagonal mining room sublevel filling method was carried out by 2D -~ system. The numerical results show hexagonal mining room structure is stable structure; tensile stress and plastic zone are not formed in roof and surrounding rock of the hexagonal mining room, which also certify hexagonal structure is feasible in Laixin Iron mine. Meanwhile, we analyze the different structure parameters and select the optimally structure parameter, structure parameter selected can guide the production of Laixin Iron mine, and the mining room style can also be a reference by other similar mines.

关 键 词：莱新铁矿 阶段充填采矿法 六边形采场结构 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]