Grey Correlation Analysis on Structural Parameters and Fuzzy Comprehensive Selection of Reinforced Concrete Shaft Lining in Deep Alluvium

The load bearing capacity test is conducted on reinforced concrete shaft lining in deep alluvium of Huainan Mine.The result shows that the main factors affecting load bearing capacity are concrete compression strength,ratio of lining thickness to inner radius and reinforcement ratio.The traditional grey correlation analysis method is improved by fuzzy mathematics theory, which amends the formulas of correlation coefficient,correlation degree and fuzzy weights.On this basis,four evaluation factors are defined as concrete compressive strength,thickness to diameter ratio,reinforcement ratio and load bearing capacity.The shaft lining models are carried on fuzzy comprehensive evaluation by the improved grey relation analysis.The result shows the rank according to the values of final evaluation.