|
Abstract To explore the rockburst prediction principle and applied technology by microseismic method，in mine with high precision microseismic monitoring equipment，the continuous rock crack in mining process on site is monitored and analyzed with laws of rockburst induced by mining and self-made rockburst prediction software MapRAS. The result shows that deep diffusion of rock microcrack induced by mining at roof and floor is the main reason for the occurrence of rockburst. It is proposed that the deeply damaged of roof and floor induced by mining is an important factor in rockburst nucleation. The function and algorithm for identifying rupture damage depths of roof and floor by using microseismic data are established. Analysis displays that between damage depths of roof and floor exist linkage and there is corresponding to cycle breakage of roof key layer，as well as its after-effect，which reflects the loading and unloading processes of roof-floor. Most of the rockbursts in Huating coal field are roadway floor rupture. The engineering test indicates the method has higher prediction performance and good application effect.
|
|
Received: 14 March 2012
|
|
|
|
2012, Vol. 31 
