Study on the failure mechanism of local steep slope mining of anti-dip slope based on FlAC3D
MA Wencheng
ZHAN Gang
XIANG Yong
WANG Lianzhi
WU Xiaobing
YAN Jie
JIA Zhengzhao
Abstract：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 FLAC3D 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.
Keywords：anti-dip slopesteep slope miningtoppling destructionsliding mechanismnumerical simulation
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 7-11 )