露天转地下境界顶柱厚度研究  

Safety Thickness of Interval Layers for the Transition from Open Pit to Underground Mining

作　　者：韩金潮 

机构地区：[1]云南华联锌铟股份有限公司,云南马关663701

出　　处：《四川有色金属》2016年第4期17-20,57,共5页Sichuan Nonferrous Metals

摘　　要：本文针对某矿山露天转地下境界顶柱厚度这一影响安全开采关键因素,运用大型数值软件Flac3d与Midas软件相结合,进行数值模拟。首先,针对不同跨度下,采用理论计算,其次,针对各种不同跨度下,不同的境界厚度及钢筋混凝土组合方案下,分别模拟出其模型的应力应变状态分布,并对其进行位移、拉应力等研究从而取得相应额境界顶柱安全系数,最终得出在境界顶柱及钢筋混凝土厚度分别在25m、1m时,境界顶柱安全系数最大。故推荐境界顶柱及钢筋混凝土厚度分别在25m、1m。In this paper, the key factors affecting the safety of the mine surface to the underground state of the top pillar thickness, the use of large numerical software Flac3d and Midas software, numerical simulation. Firstly, the stress and strain state distribution of the model is simulated under different span, different boundary thickness and reinforced concrete composite scheme. The stress and strain state of the model are simulated respectively, and the safety coefficient of the top pillar is the most. It is recommended that the state of the column and reinforced concrete thickness in the 1m, 25m.

关 键 词：露天转地下 境界顶柱 理论计算 数值模拟 

分 类 号：TD801[矿业工程—矿山开采]