Calculation And Analysis Of The Failure Depth Of The Structure Bottom

Floor water inrush is a complex geological process, which is affected by many factors, and the mechanism of water inrush from floor is still not solved completely.At present, there are many studies on the bottom of the water barrier properties, but less research on theory and the combined structure of floor rock water barrier properties, especially for mining research under the hierarchical structure of floor failure depth of mine pressure.First, this paper summarizes the existing water inrush mechanism and mining floor damage depth analysis of the calculated results, on this basis, put forward the average modulus method, realize the hierarchical structure model of the floor to floor conversion like homogeneous; like homogeneous plate model based on the MathCAD software is used to calculate the failure depth of the floor model,combined with the average modulus formula, deduced the hierarchical structure of mining floor failure depth theoretical analysis method.Secondly, this paper analyzes the influence factors of the failure depth of the floor of the structure, and determines the main influencing factors are the lithology and its combination structure. According to the above theoretical analysis method,combination of different layers of soft and hard rock and different soft and hard rock thickness than the combination of two kinds of experiments provided two kinds of experiments were carried out theoretical analysis and calculation, and the results were analyzed in the study of the mining pressure under floor lithology and structure on its influence the damage depth.According to the assumptions of the above two types of experiments, the numerical simulation model, numerical simulation was done using the FLAC3D software, further analyses the impact of lithology and structure on the floor of the floor failure depth, and the results of theoretical analysis method and conclusion are verified.Finally, combined with the new Tao Yang coal mine 10405 working face of the geological conditions, using the theory of analytic calculation, numerical simulation and empirical formula to calculate the three methods for the working face floor damage depth, the calculation results of the three methods, to verify the feasibility of calculation method of theoretical analysis is presented in this paper.