Rock burst control of Dongrong NO.2 colliery recovery roadway

Aimed at an effective control of the rock burst accident of Dongrong NO.2 colliery 17# coal,this paper provides an analysis of the main factors leading to rock burst,based on pressure accident investigation and proposes the organic combination of exploration,measurement,control deep roadway burst control theory.The results show that the mine rock burst is mainly attributed to the mining depth deeper than the critical depth where there occurs rock burst,the occurrence of peninsula pillar and many faults in coal,and irrational support structure.A better control effect results from the application of mine pressure disaster control techniques,such as advanced exploration,surrounding rock observation,timely forecasts,quality monitoring,and symptomatic program,and integrated control measures,such as disaster predicting cuttings,drilling pressure relief,and danger-eliminating loose blasting.The study provides a technical support of rock burst prevention and control of Dongrong NO.2 colliery.