摘要
为了准确评价露天煤矿含软弱夹层边坡稳定性,实现边坡形态优化设计,对露天煤矿地质资料调查分析,确定了露天煤矿潜在滑坡模式,基于边坡稳定性计算结果分析,确定了边坡最优形态。结果表明:含软弱夹层边坡潜在滑坡模式为由地表裂纹剪断至第四系底板,与各弱层相接,最后按45°-φ/2剪切角剪出的组合滑动;风化带以上稳定边坡角为14°;剖面20、A10、B21、B24可以按台阶高度24 m、运输平盘宽度30 m的采掘参数向下降深至IV煤;剖面11仅可降深至III煤;剖面B19、B20可以降深至IV煤,但需减缓风化带以下、III煤以上边坡角度。
In order to accurately analyze and evaluate the stability of the slope with soft interlayer in the open-pit coal mine and realize the optimization design of the slope form,the geological data of the open-pit coal mine was investigated and analyzed,and the potential landslide mode of the open-pit coal mine was determined.The results show that:the potential landslide mode of slope with weak interlayer is the surface crack shear to the quaternary base plate,connected with each weak layer,and finally according 45°-φ/2 slipping out.The Angle of stable slope above weathering zone is 14°.Section 20,A10,B21 and B24 can be excavation to the depth of IV coal according to the mining parameters of 24m step height and 30m width of transport flat plate.Section 11 can only be excavated to coal III.Sections B19 and B20 can be excavated to the depth of IV coal,but the slope Angle below weathering zone and above III coal should be slowed down.
作者
马婧佳
徐勇超
刘干
滕文伟
王东
MA Jingjia;XU Yongchao;LIU Gan;TENG Wenwei;WANG Dong(China Coal Technology and Engineering Group Shenyang Design&Research Institute,Shenyang 110015,China;Zhaluteqi Zhahanao'er Coal Co.,Ltd.,Zhaluteqi 029200,China;College of Mining Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《露天采矿技术》
CAS
2020年第2期88-91,共4页
Opencast Mining Technology
基金
中国煤炭科工集团有限公司科技创新创业资金专项面上资助项目(2018-2-MS013)。
关键词
露天边坡
软弱夹层
数值计算
滑坡模式
形态优化
open pit slope
weak interlayer
numerical calculation
landslide model
shape-state optimization
