Study On Prevention And Control Technology Of Rock Burst In 2502 Mining Area Of Yanbei Coal Mine

Yanbei coalfield is located in the middle and east of Huating coalfield.Its coal seam is a very thick coal seam in fold structure area.With the deepening of mine mining,the effect of high ground stress and high open mining stress on surrounding rock mass of roadway and working face is gradually strengthened due to the influence of fold structure.When the stress exceeds the limit strength of coal and rock mass,the coal and rock mass will lose stability under the continuous disturbance of mining work,and then cause the instantaneous release of elastic deformation energy.The accidental release of this energy often causes roadway deformation and plugging,equipment damage,casualties and other hazards,which seriously threatens the safe mining of the mine.In order to reduce the damage degree of equipment and roadway and personal injury,and reduce the economic loss of enterprises,it is of great significance to study rock burst prevention and safety protection technology in Yanbei coal mine.Taking 2502 mining area of Yanbei coal mine as the background,this paper determines the main reason of rock burst induced by the mining area by theoretical analysis method;combined with the field measurement method,the mine pressure law of roadway in the area where the rock burst occurs is observed;at the same time,through the method of microseismic monitoring,the vibration energy frequency and relative position of the rock burst area are monitored;through numerical simulation analysis Methods:the rationality of narrow coal pillar roadway protection in 2502 mining area was evaluated,and the roadway support parameters of narrow coal pillar driving along goaf were optimized.Finally,through field application,the research results of this paper were verified:Through theoretical analysis,numerical simulation,field measurement and other comprehensive research methods,the comprehensive monitoring and early warning method of rock burst is adopted in 2502 mining area of Yanbei coal mine,which is mainly based on microseismic monitoring and supplemented by ground pressure monitoring.At the same time,by optimizing the size of narrow coal pillar,the reasonable prevention and control measures of rock burst are determined,which effectively reduces the occurrence frequency of rock burst and ensures the safety of the mine full production.