Study on automatic analysis and simulation of ground pressure law in large mining height working face

In order to efficiently, scientifically and economically analyze the movement law of stope roof, effectively analyze the movement trend and change situation of stope roof, and master its activity law, this paper used the idea of“plan-implement-inspect-dispose”(PDCA) cycle management and control in industrial production for reference, and developed a set of automatic analysis and simulation system of ground pressure law of large mining height working face based on PDCA cycle concept. The mechanical parameters of overlying strata in the stope can be inversed and revised based on the measured ground pressure data. Firstly, the system determines the transfer rock beam supporting layer and follow-up layer according to the deflection algorithm or step algorithm in the practical ground pressure theory before mining, and calculates the related stope overburden movement parameters theoretically; secondly, it carries out on-line analysis on the measured data of hydraulic support resistance during mining, and extracts the roof movement parameters.Finally, by inverse the mechanical parameters of the key rock formation of the recovery of the roof, the system prediction and the field measurement analysis result error is gradually decreasing, and basic data is provided for the calculation of other related parameters. The application results of the system in the working surface of the Yingpanhao Coal Mine No.2201 working face show that the model is verified for the calculation accuracy of several key parameters such as the initial direction of the work surface transfer rock beam, and the system simulation data and the on-site measured data..The error between the system simulation data and the field measured data is continuously reduced, and the system accuracy is continuously improved, which achieves the quantitative analysis of the field ground pressure behavior law. The research idea provides a fusion approach for theoretical calculation and field measurement of ground pressure observation.