Study on slope stability of steep slope mining in east slope of Anjialing Open-pit Mine
DENG Zengbing
LI Jingtao
WANG Yantao
Abstract：To investigate the slope stability of steep slope mining in the east slope of Anjialing Open-pit Mine,the article adopts FLAC3D to conduct numerical simulations of typical cross-sections,and analyzes displacement,stress,and strain to determine the failure mode.The article uses limit equilibrium method(M-P method)to calculate the stability of two representative cross-sections below the 1045 level under a steep mining scheme with 5 m stepwise reductions in bench width.The results show that the failure mode of the east slope follows an approximately"circular arc"pattern within the rock mass.When the entire area below the 1045 m level advances 35 m eastward,the stability factors for the two typical cross-sections reach 1.051 and 1.05,meeting the required safety reserve coefficient of 1.05.This steep slope mining scheme achieves additional coal recovery of 1,100 tons per meter length with a stripping ratio of approximately 0.97 m3/t,maximizing economic benefits while ensuring safety margins.
Keywords：steep slope miningnumerical simulationlimit equilibrium methodslope stabilityeconomic benefit
Publication Date：2025-10-15
Online Publishing Date：2025-12-12(First online date of this platform, not the publication date of the document)
Pages：5( 34-38 )