Research on effect of coal spontaneous combustion on slopes stability of open-pit mine
QIN Yifei
YU Bin
HU Yatao
Abstract：To address the issue of large-scale,prolonged exposure to cause coal spontaneous combustion of residual coal along the end slope in some open-pit coal mines due to delayed internal dumping,which severely threatens production safety,the article adopts high-temperature heat treatment followed by rock shear testing,reveals the thermal damage patterns of shear strength parameters in slope coal-rock masses under high-temperature conditions.Using COMSOL simulation software,we simulate the temperature field distribution characteristics of slope rock masses.Based on the two-dimensional rigid body limit equilibrium method,the article elaborates influence law of coal spontaneous combustion on open-pit slope stability.The results show that high temperature significantly affects the shear strength of coal-rock masses;temperature fields exhibit arc-shaped distributions in coal natural zones and shallow front-edge regions.Under high-temperature conditions,the safety factor of open-pit mine slopes decreases substantially compared to normal conditions.
Keywords：slope stabilityspontaneous combustion of residual coaltemperature field distributionrock mass damagestability assessment
Publication Date：2026-02-28
Online Publishing Date：2026-03-19(First online date of this platform, not the publication date of the document)
Pages：6( 82-87 )