| Surrounding rock stability classification is the basis of structural design of undergroundengineering, it would be affected by many factors, which have features of ambiguity anduncertainty, the membership function, which based on fuzzy mathematical methods, play animportant role in rock mass classification.Analyzing the major damage form in the underground engineering surrounding rock, aswell as the major judgment basis in surrounding rock unstable failure, at the same time, todetermine the main influencing factors on the basis of a full understanding of the factors of thestability of underground engineering surrounding rock. Establish the stability of surroundingrock two fuzzy evaluation model according to various factor relationships, the use ofchromatography to determine the rate of each factor, the membership function of the indexfactors to establish the stability of surrounding rock of the two fuzzy rating method.According to the specific geological conditions of Jinshandian Iron, extraction index valueof each factor affect Jinshandian Iron underground mining rock mass stability, the use of twofuzzy comprehensive evaluation method of fuzzy comprehensive evaluation of the stability ofthe surrounding rock. The using of finite element analysis software ANSYS numerical tosimulation of the mining tunnel, select the rock density, Poisson’s ratio and elastic modulus, todo its sensitivity analysis, in which these indicators are readjustable, in order to do fuzzycomprehensive evaluation on the stability of surrounding rock. Combine the method used forfuzzy evaluation of the stability of surrounding rock of underground engineering fuzzyevaluation and finite element analysis method for quantitatively accurate evaluation, to reducethe deviation in evaluation results caused by the subjective consciousness judgment of experts. todo scientific classification of the stability of the mining tunnel. |
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