Research Of Prediction Method For Rock Burst Based On Mining Stress Monitoring By FBG

With the rapid development of the national economy,shallow coal resources exhausts day by day.The coal mining gradually extends to the deep,resulting in coal dynamic disaster's frequency and intensity increased significantly,especially,the rock burst disaster is more serious.But the rock brust's mechanism is still not clear,which is reflected by divergent views on rock brust.Therefore,prediction and early warning is one of the effective means to prevent accidents.Taking stress control theory as a guide,combining with the research of fiber Bragg grating measurement and dynamic early warning technology of rock burst,the early warning system of rock burst was established based on the technique of mining stress monitoring,which collecting data by developed borehole stress meter,and demodulating data by fiber grating substation,and analysising data by the mining stress system software.The system was applied to the dynamic prediction and early warning of coal mine working face,such as dynamic stress monitoring and rock burst prediction,revealing the change of the working surface affected by mining dynamic stress accurately,deducing the temporal and spatial evolution law of stress field.The system can improve the monitoring and early warning level of rock burst disaster and reduce the occurrence of rock burst accident effectively in coal mine.