吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (4): 1082-1092.doi: 10.13278/j.cnki.jjuese.20170241
胡高建1,2,3, 杨天鸿1, 张飞1
Hu Gaojian1,2,3, Yang Tianhong1, Zhang Fei1
摘要: 为了研究抚顺西露天矿南帮边坡的破坏机理,抑制边坡的滑移变形,应用微震监测技术和卫星监测技术,研究了南帮边坡的滑移破坏轮廓,基于RFPA(rock failure process analysis)强度折减法原理,研究了开采到最终境界时的边坡破坏机理,提出了两阶段内排压脚的防治措施,并分析了内排压脚对滑坡变形的抑制效果。研究结果表明:1)边坡破坏机理为,破坏最先发生在边坡上部,在边坡中部沿着弱层和破碎带运动,到边坡下部不整合面处受到抑制,最后在边坡底部沿中间弱层切出坑底,形成滑坡轮廓;2)两阶段内排压脚方案能明显抑制弱层的错动,当内排到-262 m水平时,可部分抑制底部弱层处滑移,底鼓现象消失;当内排到-212 m水平时,可完全抑制住底部弱层的滑动,此时边坡安全系数为1.324,满足安全要求。
中图分类号:
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