基于FlAC^(3D)的反倾边坡局部陡帮开采破坏机理研究  

Study on the failure mechanism of local steep slope mining of anti-dip slope based on FlAC^(3D)

作　　者：马文成 詹刚 向勇 王联志 伍小兵 闫杰 贾正昭 MA Wencheng;ZHAN Gang;XIANG Yong;WANG Lianzhi;WU Xiaobing;YAN Jie;JIA Zhengzhao(Xinjiang Yihua Mining Co.,Ltd.,Changji 831100,China;China Coal Research Institute,Beijing 100013,China)

机构地区：[1]新疆宜化矿业有限公司,新疆昌吉831100 [2]煤炭科学技术研究院有限公司,北京100013

出　　处：《露天采矿技术》2025年第1期7-11,共5页Opencast Mining Technology

摘　　要：针对露天煤矿反倾边坡陡帮开采破坏模式问题,结合露天煤矿边坡陡帮开采特征,在反倾边坡破坏机理研究基础上,提出了反倾边坡陡帮开采破坏模式;选取五彩湾一号露天煤矿西帮边坡开展FLAC^(3D)数值模拟研究,获取应力场、位移场和应变等变化规律,验证了滑动机理。研究结果表明:露天煤矿反倾边坡滑动变形主要经历拉裂变形区、向上传递破坏区、潜在破坏模式、前缘剪切破坏区4个阶段;局部区域的变形破坏和整体滑动变形边坡出现2种变形破坏模式;局部区域变形特征为前缘岩体在重力作用下挤压煤层形成向边坡临空面的位移;整体变形模式符合反倾边帮陡帮开采破坏模式,形成后缘圆弧形潜在滑动面,前缘直线型滑动模式。Aiming at the failure mode of anti-dip slope steep slope mining in open-pit coal mine,combined with the characteristics of steep slope mining in open-pit coal mine,based on the study of the failure mechanism of anti-dip slope,the failure mode of steep slope mining of anti-dip slope is put forward,and the west slope of Wucaiwan No.1 Open-pit Coal Mine is selected to carry out FLAC^(3D)numerical simulation research.The variation laws of stress field,displacement field and strain are obtained,and the sliding mechanism is verified.The results show that the sliding deformation of anti-dip slope in open-pit coal mine mainly goes through four stages,namely,tensile deformation zone,upward transfer failure zone,potential failure mode and front shear failure zone.The simulation shows that there are two deformation and failure modes of the slope,the deformation and failure of the local area and the overall sliding deformation characteristics;the deformation characteristics of the local area are the displacement of the front rock mass squeezing the coal seam to the free face of the slope under the action of gravity.The overall deformation mode conforms to the failure mode of anti-dip steep slope mining,forming a circular arc potential sliding surface at the trailing edge and a linear sliding mode at the leading edge.

关 键 词：反倾边坡 陡帮开采 倾倒破坏 滑动机理 数值模拟 

分 类 号：TD824.5[矿业工程—煤矿开采]