高陡边坡下露天地下联合开采隔离顶柱合理厚度的研究

Suitable Thickness of Boundary Roof of Open-pit Underground Combined Minging Under High and Steep Slope

简要介绍了计算隔离顶柱厚度的方法即力学解析法、经验法、数值模拟法三大类,其中数值模拟法能够充分考虑高陡边坡对隔离顶柱厚度的影响。应用数值模拟法,可直观、真实地反映出隔离顶柱应力分布情况,结合顶柱岩石力学性质,即可得出此时顶柱的稳定性状况。通过结合某矿山实例,分析不同顶柱厚度条件下的顶柱应力分布,从而计算出合理的、安全的顶柱厚度。

Briefly Introdured methods to calculate the boundary roof thickness which can be divided into three main categories：mechanics analysis method,empirical method and mathematical simulation method.Among them,mathematical simulation method can get full account of the slope′s influence on boundary roof.Mathematical simulation method can directly reflect the stress distribution of the boundary roof,and the stability of the roof canbe made by combination with rock properties.A certain mine as an example,the stress distributions of the roof on different thickness were analyzed,and then the suitable thickness of boundary roof was got out.