| As the increase of depth and strength of mining, the amount of rock burst mines mountedup. In the pillar of fully mechanized caving and mining face of250103mining section ofHua-ting coal mine, this phenomena is more frequent and violent causing the dangeroussituation in the250103mining section. Therefore, the research of prediction and pretreatmentmethod of Hua-ting caol mine rockburst contributed to improve the safety of mine.This paper firstly rockburst formed to analyze causes and impact of risk for Hua-tingcoal, FLAC3Dnumerical simulation of simulated coal rocks of tectonic stress on the roadwayimpact, and comprehensive index method to determine the impact of coal and rock Hua-tingcoal mine250103working face tendencies characteristic; And250103working face hasstrong burst potential and return air crossheading shock rock burst index than transport alongthe slot because of the20m width pillar. The main factors of influencing the rock burst hazardof250103working face are folding structure, burst tendency of coal seam, hard main roof and20m width pillar and so on. According to the analysis of250103mining section, thedangerous areas are defined during the mining process of250103working face, and someadvices on prevention design, length of working face, width of pillar and mining sequencewere given. The rock burst monitoring and controlling system of250103mining section wereconstructed. The drilling cuttings method, seismological method and roof monitoring werealternately and synthetically used to inspect and forecast the burst danger. The pressurerelease blasting in ribs, deep-hole blasting and water infusion in roof and coal seam methodswere used to reduce the rock burst danger, and the safety of250103working face has beenbasically ensured.In this study, reference other mines with similar problems. |
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