Research On Prediction And Prevention Technology About Rock Burst Under The Influence Of The Upper Coal Seam Mining In The No.2Jining Coalmine

With the depth of coal mining increased, the numbers of rock burst disaster are also in anincreasing trend. When the rock burst happened, it will not only influence the tasks of coal mineproduction, but also damage the mining equipments and injure the workers. So it is necessary forus to be more thorough and systematic research on the protective mechanism of the rock burst.Through the scene investigates and studies, testing, numerical simulation and theoreticalanalysis method, this paper systemically assess the rock burst hazard and research the technicalmeasures in93down07working face of the No.2Jining coalmine in the course of actual miningand excavating. Firstly, by the methods of the scene investigates and studies, the authoridentified the3down coal seam with strong rock burst liability, and its roof with weak burstliability. Secondly, with the numerical simulation method, the author analyzed the stressdistribution of tail gate influenced by bidirectional stress perturbation during tunneling. Then,this paper used empirical analogy method and comprehensive index method to analysis impacthazard in the process of the working face stopping process. Finally, through the above analysis,the author divided the dangerous area and used different monitoring measures and dangerreleasing measures to achieve the purpose of safety production.The research achievement of this paper has a practical guiding significance for the No.2Jining coalmine in the later mining, and provides the mine safety production with a certaintechnical support, and lays a certain foundation for preventing and controlling the rock burst.