Research And Analysis On Concentrated Stress Disaster Of15th Coal Of Anzi Mining Area Of Changgouyu Mine

With increasing mining depth and increasing mining area of Changgouyu minein Beijing,dynamic disasters in mine occur more frequently. These mine dynamicdisasters brought a lot of risks to daily production of Changgouyu Mine.Therefore，relevant technical staff in Changgouyu mines and researchers of our group decided tomake a study on the mechanism and the reasons of the mine dynamic disaster in orderto guide future prevention work on mine dynamic disaster in Changgouyu mine better.The main contents of this paper is to study mechanism of stress concentrationdisaster in Changgouyu mine and reduce stress concentration area to a certain range,in order to take more effective preventive measures and reduce cost on preventionmeasures of tress concentration disaster.Author make a study on the accident analysis on the stress concentration disasteron Changgouyu mine by means of field measurement, laboratory simulations andtheoretical analysis, then,author distinguish between the different types of stressconcentration disaster in this mine, the type is divided into extrusion-type disasters、the type of squeezed-out disaster and rock burst type of Mine dynamic disaster. Afteranalysis on more than a dozen disasters that occurred in Changgouyu mine, weconclude that their disasters type belong to the former two types, namely,extrusion-type disasters, the type of squeezed-out disaster.Meanwhile, structuralmodel of stress. Concentration disaster in Changgouyu mine is established：wedge-shaped structure and inverted wedge-shaped structure models. Establishmentof these theories have guiding significance to Changgouyu mine on disasterprevention in the future and provide theoretical basis for effective preventionmeasures of stress concentration disasters. The establishment ensure Changgouyumine safe, efficient and can improve economic efficiency, and,provide reference forprevention of stress concentration disaster in the future.