莱新铁矿软岩地层阶段充填法应用研究  

APPLICATION OF SUBLEVEL FILLING METHOD TO SOFT ROCK STRATA IN LAIXIN IRON MINE

作　　者：李文秀[1] 刘新强[2] 

机构地区：[1]河北大学建筑工程学院,河北保定071002 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《岩石力学与工程学报》2010年第A02期3749-3754,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：河北省科技攻关项目(072156142)

摘　　要：莱新铁矿地质条件复杂,矿岩软弱破碎,地下裂隙水发育,采场地压表现为在自重应力作用下,顶板出现拉应力破坏,导致顶板冒落。针对这种情况,就如何实现安全开采问题进行数值模拟分析。数值分析结果表明,与矩形采场结构相比,菱形采场结构能够较好的适应应力转移规律。据此,针对矿山工程实际,提出菱形采场结构阶段充填采矿方法。应用2D–σ软件对菱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数值计算。数值结果表明,菱形采场结构是一种基本稳定结构;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;提出该方法在莱新铁矿应用的最佳结构参数,对莱新铁矿软岩条件下开采具有一定的指导作用。Because of complex geological conditions,weakness and crushing of ore and rock mass and developmental underground water,Laixin iron mine is one of the mines which is difficult to exploit in China. Under the self-weight stress,the tensile failure appears in the roof which leads to roof falling. By comparing with rectangle-shaped mining room,the diamond-shaped mining room can adapt to the stress transferring law. Then,the sublevel filling mining method with the diamond-shaped mining room is proposed based on the practical engineering;and the stress distribution,deformation characteristics and distribution of plastic zones are calculated by the 2D–σ software. The numerical results show that the diamond-shaped mining room is a stable structure. Tensile stress and plastic zone are not formed in roof and surrounding rock of the diamond-shaped mining room; and the sublevel filling method is feasible in soft rock strata in Laixin iron mine.

关 键 词：采矿工程 软岩 菱形矿房 分段充填 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]