Mechanism Study On The Occurrence Of Fault Coal Burst Under The Influence Of Mining

Fault fault type coal burst is a phenomenon of fault instability caused by the rapid sliding between the fault and the fault caused by the mining. In recent years, in order to effectively monitoring and controlling fault rockburst, domestic and foreign scholars for its occurrence mechanism and influencing factors of launched a large amount of research, but little anthropogenic disturbance of fault rockb urst mechanism research. Research on the mechanism of the impact of dynamic mining on the occurrence of fault slip.In this paper, the theoretical analysis method to study the factors affecting the stability of the fault, has carried on the analysis to the mining under the influence of fault instability mechanism of; by using similar simulation experiment research method, on the optical fiber sensing monitoring technology as the main means of monitoring, dynamic impact characteristics of fault movement of mining and analysis the relationship between the movement of overlying strata structure and fault movement. At the same time, it is proved that the optical fiber sensing monitoring system can be used as an effective means to monitor the stability of the fa ult.Through the analysis of the mechanical model, it is indicated that the stress balance on the fault plane caused by mining is the main cause of the coal burst induced by fault. Experimental study shows that the working face of the footwall advance and face plate to promote the process, the movement characteristics of the overburden and fault dynamic coal burst appeared to different extent. At the same time, based on the spatial structure theory, the relationship between the movement of the key layer and the stability of the fault is analyzed.