Numerical Simulation of Overburden Strata Failure Law in Deep Mining of Inclined Coal Seam
DENG Yuhua
SUN Guowen
HUANG Gun
Abstract：Based on Mohr-Coulomb Criterion of rock failure and for the purpose of studying the overburden rock failure law of the inclined coal seam in deep mining, in this paper, simulation analysis was made on the stress, displacement and failure of surrounding rock in the whole mining process with the working face advance by using FLAC3D numerical software, which preliminarily revealed that the failure feature and movement rule of the overburden strata were influenced by the stress redistribution induced by step excavation. A numerical model of the coal-rock mass permeability ratio coefficient was established according to the empirical relationship between the permeability and mining-induced stress variation in mining and by using the FISH programming language. The coefficient change after mining was calculated by using this model and it was then the characterization of the pressure relief range of the coal seam during mining. All of these provided a strong guarantee for surrounding rock control and gas treatment in deep mining of the inclined coal seam.
Keywords：inclined coal seamMohr-Coulomb Criterionnumerical simulationoverburden strata failure
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 15-20 )