The Risk Assessment And Prevention Of Rock Burst In The No.9 District Of No.2 JiNing Coalmine

With the increase production of No.2 JiNing coal mine,the present stage has more than 700 m deep, geological structure and coal seam occurrence condition is more complex, this will aggravate the risk of rock burst, so it is necessary for us to predicte and prevent and control the rock burst.This paper takes the ninth mining area of rock burst in the No.2 JiNing coal mine as the research object, as well as to divide the risk zone of rock burst and comprehensive evaluation, and the corresponding prevention measures technical research of the No.2 JiNing coal mine. Using field observation and experimental study, coal impact tendency and drilling impact parameters in the No.2 JiNing coal mine are studied.Secondly, with numerical simulation method, analyse the 3downcoal working face mining influenced 3up coal pillar, further define 93up04 working face in the scheme of mining face.Finally, through the above analysis, the author divided the dangerous area and used different monitoring measures and danger releasing measures.The research results has important reference significance for similar geological conditions and the No.2 Jining coalmine, laying a certain foundation for the prevention and coal mine safety in production.