含顺倾弱层软岩边坡三维稳定性影响因素分析

发布时间：2018-03-04 15:31

本文选题：顺倾弱层　切入点：软岩边坡　出处：《金属矿山》2017年01期 　论文类型：期刊论文

【摘要】：为定量揭示露天矿开挖过程中各人为因素对含顺倾弱层软岩边坡三维稳定性的影响及其程度,以扎哈淖尔露天矿南帮边坡为工程背景,基于强度折减法,应用FLAC~(3D)数值模拟软件,探讨了开挖位置、开挖坡角和内排追踪距离不同时南帮边坡的变形破坏机制和边坡稳定性的影响规律。结果表明:无论开挖位置、开挖坡角与追踪距离如何变化,横采南帮的滑坡模式均为以IVC煤底板弱层为底界面的切层-顺层滑动;在横采条件下,边坡三维稳定性主要受内排追踪距离影响,随追踪距离的增大呈负指数规律减小,且随开挖位置的向南偏移或开挖坡角的减小近线性减小;在横采条件下,内排土场与工作帮间的追踪距离控制在一定范围内时,可以充分利用边坡稳定性的三维效应回收煤炭资源。
[Abstract]:To quantitatively reveal open-pit excavation process of various human factors including the effect of weak bedding soft rock slope three-dimensional stability and degree of Zaha to the south slope of nur opencast mine as the engineering background, based on the strength reduction method and application of FLAC~ (3D) numerical simulation software, discusses the excavation position, slope angle and internal at the same time do not influence row track distance south slope deformation and failure mechanism and slope stability. The results show that no matter how the position of excavation, excavation slope angle and the distance change tracking, landslide model cross mining are to help the South IVC coal seam in weak shear layer - layer as the bottom interface of bedding sliding in horizontal mining; under the condition of three-dimensional slope stability is mainly affected by the inner row distance tracking, tracking the negative exponential decrease with the increase of the distance, and with the excavation position of southward migration or the slope angle decreases nearly linearly decreases; in cross mining conditions, Inner Dump When the tracking distance between the working groups is controlled within a certain range, the coal resources can be recovered fully by the three-dimensional effect of the slope stability.

【作者单位】：辽宁工程技术大学矿业学院;
【基金】：国家自然科学基金重点项目(编号:U1361211);国家自然科学基金项目(编号:51474119,51104084) 辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金项目(编号:LNTU15KF08)
【分类号】：TD824.7

【相似文献】