Analysis And Prediction Of Excavation Stability With Catastrophe Theory

The Stability problem of excavation is always the key problem that undergroundiron mines face, unstable failure of excavation is one of the major failure modes of ironmines. Therefore, analysis and prediction of excavation stability is vital for bothimprovement economic benefit of mine enterprise and risk and loss reduction of aproject.Based on the recovering remnant ore engineering practice of middle and small sizemine of east area of Hubei Province, the remnant of roof and pillar have to be recycled,on the stage of roof recovery, by setting up the cusp catastrophe model analysis model ofroof-pillar with catastrophe to analysis the mine stability, and by considering the creepproperty of rockmass, development path of stability is analyzed qualitatively, to providea scientific basis for safety management of mines; meanwhile, to explore the influenceon the stability of the excavation during pillar recovery, the paper selects the indicatorsrelated to stability of excavation, establishing catastrophe progression model on onstability analysis, finally, the critical catastrophe progression value of excavation collapseis obtained, and carries on the verification in conjunction with actual case projects.