Research On Regional Prediction And Prevention Of Rock Burst In The Yixin Coal Mine

Rock burst is a common dynamic disaster behavior in coal mining.In resent years,overintensified extraction of coal makes rock burst accidents occur frequently.Rock burst accidents not only affect the normal coal mine production but also endanger the miners safety and damage the equipment.Therefore,it is necessary to research the rock burst prediction technology for realize the safety mining.Yixin coal mine has the danger of rock burst with complicated geological conditions and more then 500m mining depth.In order to ensure the future working face safety mining of Yixin coal mine,the influencing factors of rock burst was confirmed of mining depth,roof strata structure,bursting liability of coal and rock,geologic structure,mining speed,unreasonable mining design and insufficient mining of protective layer by the methods of and theoretical analysis numerical simulation.The rock burst danger of following working face was determined by the methods of comprehensive index method and multifactor coupling method,and the rock burst danger of 22 working face in the 3#coal seam,the 7#coal seam,the 8#coal seam,the 15#coal seam,the 18-1#coal seam,the 22#coal seam was determined combined with the influencing factors of rock burst.The dangerous rock burst zones was divided and the monitoring and danger breaking measures was formulated.The research results of the paper have targeted guiding function for the future working face mining.It provides technical support for working face safety mining and lays a well foundation for rock burst prevention.