东明露天矿地质构造诱发边坡变形及控制开采研究
Study on slope deformation induced by geological structure and control mining in Dongming Open-pit Mine
刘国栓 1李坤 1刘祥 1陈俊彬 1林旭楠 1张峰林 1康佳明 1王丽华1
作者信息
- 1. 呼伦贝尔东明矿业有限责任公司,内蒙古 呼伦贝尔 021000
- 折叠
摘要
东明露天矿南帮边坡在采矿与水耦合作用下出现变形与裂缝,为了保障南帮坡角煤安全采出,采用地质勘查查明边坡工程地质条件,通过抗剪强度参数反分析获取岩层强度指标参数;采用数值模拟方法分析了边坡滑动模式,并计算了开采前、开采后及内排压脚等阶段的稳定系数.结果表明:南帮处于地质构造翼部构成顺倾边坡,是变形主要因素;边坡滑动模式为"坐落—滑移式",并形成了 3 个滑动变形区域;开采前考虑降雨与弱层作用下边坡局部稳定系数和整体滑动稳定系数均大于 1.1;边帮提角开采后稳定系数呈现先降低至 1.012,内排压脚回填后稳定系数提升至 1.105,呈现先减低后增加的动态变化.
Abstract
The southern slope of Dongming Open-pit Mine has deformation and cracks under the coupling of mining and water.In order to ensure the safe mining of the southern slope,we use geological exploration to find out the engineering geological conditions of the slope,and obtain the strength index parameters of the rock layer by back analysis of the shear strength parameters.The article adopts numerical simulation method to analyze the slope sliding mode,and calculates the stability coefficients of the pre-mining,post-mining and internal pressure foot stages.The results show that the south slope is in the wing of the geological structure,which is the main factor of deformation.The slope sliding mode is'located-sliding',and three sliding deformation areas are formed.Before mining,the local stability coefficient and the overall sliding stability coefficient of the slope under the action of rainfall and weak layer are greater than 1.1.After the mining of the corner of the slope,the stability coefficient decreases first to 1.012,and the stability coefficient increases to 1.105 after the backfilling of the internal dumping foot,showing a dynamic change of decreasing first and then increasing.
关键词
地质构造/顺倾边坡/参数反分析/滑动模式/控制开采Key words
geological structure/downward slope/parameter back analysis/sliding mode/control mining引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据