| Rock burst also known as rock or coal gun burst is a special form of pressure behavior, and one of the most threatenest force disaster in the underground mining engineering. It refers to several conditions of stress. A large number of elastic energy which are gathered in the body of coal or rock under some certain conditions are suddenly released and make the rock and coal throw from the coal wall. The rock burst not only damage the supports and roadway leading to the mine can not maintain the normal production; but also threaten the lives of mine workers. Therefore the system and a profound study of the burst has an important theoretical and practical significanceIn this paper, according to the geological background and the characteristics of dynamic pressure of PengZhuang Coal Face 1305; analysis the occurrence of rock burst conditions and influencing factors; establish a geological model of coal and rock structure to use the Flac3D numerical simulation software to simulate the seam of roadway excavation and a dynamic and combine with a 1305 field test to work out the impact of fully danger zone, delineate areas of high guard against. Dominated by electromagnetic radiation, supplemented by cuttings method of combining forecasting methods to test the danger zones.Use the Principle of energy analysis to determine the mining field and tunnel elastic energy criterion for a theoretical basis of the burst-site analysis. At the same time propose the preventive measures for 1305 and the beyond danger measures. |
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