某矿地下采空区对边坡稳定性影响的研究

发布时间：2018-04-14 04:08

本文选题：采空区 + 边坡　；参考：《金属矿山》2017年09期

【摘要】：针对含采空区边坡的稳定性问题,考虑不同跨度采空区及不同厚度边坡保安矿柱对边坡稳定性的影响,基于强度折减法的基本原理,利用FLAC~(3D)软件,分别模拟4种情况(包括20种情形)下的边坡稳定性。通过对比不同跨度采空区和不同厚度边坡保安矿柱的边坡应力、塑性区和安全系数变化情况,分析地下采空区对边坡稳定性的影响规律。分析结果表明:在边坡保安矿柱厚度一定时,采空区跨度越大,边坡稳定性越差;在空区跨度一定时,边坡稳定性性受保安矿柱厚度和采空区与边坡潜在滑动面的相对位置共同影响,保安矿柱厚度变化时,采空区与边坡潜在滑动面的相对位置也相应发生变化,从而导致在一定范围内,随着边坡保安矿柱厚度的增大,边坡安全系数出现先减小后增大的现象。
[Abstract]:In view of the problem of slope stability with goaf, considering the influence of different span goaf and different thickness slope security pillar on slope stability, based on the basic principle of strength reduction method, the software FLACU 3D is used.The slope stability is simulated in 4 cases (including 20 cases).The influence of underground goaf on slope stability was analyzed by comparing the variation of slope stress, plastic zone and safety factor between different span goaf and different thickness slope safety pillar.The results show that the larger the span of goaf is, the worse the slope stability is when the thickness of safety pillar of slope is constant, and when the span of goaf is fixed,The stability of the slope is affected by the thickness of the safety pillar and the relative position of the goaf and the potential sliding surface of the slope. When the thickness of the safety pillar changes, the relative position of the goaf and the potential slip surface of the slope changes accordingly.Therefore, in a certain range, with the increase of slope safety pillar thickness, the slope safety factor decreases first and then increases.
【作者单位】：中钢集团马鞍山矿山研究院有限公司;金属矿山安全与健康国家重点实验室;华唯金属矿产资源高效循环利用国家工程研究中心有限公司;安徽恒源技研化工有限公司;
【分类号】：TD854.6

【相似文献】