Study On XinAn Mining Of 1402 Working Face Mining Pressure's Regularity

This paper is aim at XinAn mine the first mining face's (1402 working face's) geological conditions, using the laboratory experiment, theoretical analysis,discrete element numerical simulation, similar material simulation to predict the working mine pressure regularity, and adopting industrial test to get the mine pressure regularity of working face.Paper through the analysis of the broken coal role of abutment pressure and mining height change on the influence of the distribution law of abutment pressure, Determine the top-coal under the condition of completely broken rational mining height in 2.5?3.0 m, using UDEC numerical simulation analyzed and compared the top-coal under the conditions of different mining height (2.5m?3.5m?4.5m) are broken and the overburden stress and damage rule, finally obtained the reasonable mining height And simulated under the condition of reasonable mining height are broken and stress law of overburden migration.Based on 1402 working face in mining similar simulation experiment turn out:The main roof after the second periodic weighting, crack up, stretching forward, finally passes through the earth's surface, the surface subsidence and to determine the scope of forepole roadwayIn the above research conclusion on the basis of the site industrial test, the 1402 working face of hydraulic support working resistance observed and analyzed the stress characteristics of hydraulic support, obtained by observation of hydraulic support working resistance to pressure interval, the results with similar coincided basically with the calculated results of the simulation and numerical simulation, confirmed by numerical simulation and similarity simulation experiment results are reasonable.The results of the mine and the similar geological conditions of the mine production has important reference value.