| The rock burst is one of the dynamic catastrophe phenomena in the coal mining. In the pillar region of fully mechanized caving and mining face of 2501 mining section of Hua-ting coal mine, this phenomena is more frequent and violent causing the dangerous situation in the 2501 mining section. Therefore, it is great urgent to study the laws of rock burst and prevention measures of pillar region ,and that will make a great significance for the safety of coal mine.First, the coal and rock burst potential of 250102 working face in Hua-ting coal mine are determined by comprehensive index method in laboratory in this dissertation.The experiment results showed that the coal seam has 3nd level of burst potential, and weak burst potential after waterish and 250102 working face of 2501 mining section has strong burst potential, and the index of burst potential of is bigger than the air return gate because of the 20m width pillar. The main factors of influencing the rock burst hazard of 25102 working face are folding structure, burst tendency of coal seam, hard main roof and 20m width pillar and so on. According to the analysis of 2501 mining section, the dangerous areas are defined during the mining process of 250102 working face, and some advices on prevention design, length of working face, width of pillar and mining sequence were given. The rock burst monitoring and controlling system of 2501 mining section were constructed. The electro magnetic emission (EME), drilling bits and seismological method were alternately and synthetically used to inspect and forecast the burst danger. The pressure release blasting in ribs, deep-hole blasting and water infusion in roof and coal seam methods were used to reduce the rock burst danger, and the safety of 250102 working face has been basically ensured. |
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