Reliability-based Stability Research Of Mine-out Area

ABSTRACT:Aiming at the uncertainty and randomness of influencing factors of underground mine-out area, this paper combines the production condition of Fankou Lead-Zinc Mine Deep ore block and uses experimental study and theoretical analysis methods to study mine-out area stability research based on reliability theory. The paper aims to reveal the factors influencing the stability of the mine-out area and its mechanism and determine mine mine-out area deep instability mode. Based on the tests to obtain the relevant physical and mechanical parameters of ore and rock mined-out area and analysis of probability distribution, the paper determines deep mine-out area Fankou stability analysis of reliability limit state equation and formed based on reliability theory mine-out area stability of identification and evaluation Methods.The main research results obtained by the paper are as follows:(1)In connection with the mine-out area engineering practice in deep mining,the paper analyses and reveal the impact mine-out area stability factors and its mechanism of action, and analysis to determine the mine-out area of mine deep instability mode obtained the mine-out area roof instability mode pull off the destruction of the ends, pillars of the instability mode for serious spalling conclusion, the conclusion and mine engineering agreement laid the foundation for the reliability analysis of the follow-up mine-out area.(2)Reliability analysis of mechanical parameters required mine-out area of ore, compressive strength, tensile strength, modulus of elasticity and density, thus reliability analysis of the stability of the mine-out area by Experimental study of the stability of the mine-out area create the conditions.(3)Principles of Applied Statistics conducted the statistical analysis of the the mine-out area mine rock physical and mechanical parameters, physical and mechanical parameters of the probability distribution types and their mathematical characteristics reveal mine-out area ore and rock mechanics parameters of the probability distribution law for mining mine-out area stability reliability analysis further laid the foundation.(4)Principle to determine the use of reliability theory apply to deep, Fankou, mine-out area stability analysis the reliability limit state equation formed based on the reliability theory mine-out area stability identification and evaluation methods, and verified by an example of the method effectiveness. The practice shows that the method not only can effectively achieve the analysis and evaluation of mine-out area stability, but also to determine the impact of factors mine-out area stability sensitivity of the gob destabilization identification and prevention to provide technical support.