Study On Risk Analysis And Prevention Of Rock Burst In Coal Mine Face

As a kind of complex dynamic phenomena in coal mine,rock burst will release a large amount of elastic potential energy and cause roadway damage when the stress of underground working face exceeds the limit state,if no pressure relief or protective measures are taken,which will seriously threaten the safety of equipment and personnel.At present,the prevention and control of rock burst is an important front-end subject for all kinds of mine construction and underground operation.On March 25,2016,the State Administration of Safety Supervision issued a new revised edition of "Coal Mine Safety Regulations"(General Administration Decree No.87).Chapter 8 is "Prevention and control of rock burst",which clearly defines the delimitation,prediction,inspection and measures of such risks.The implementation is briefly explained.The main causes of rock burst hazards include natural factors,technical factors,production management system,etc.Because the roof of coal seam is prone to fall when it is broken,which seriously affects the loading of coal body,it is difficult to form high stress concentration,and the broken roof does not have the ability to accumulate energy.Therefore,rock burst and roof caving are opposite each other,and rock burst occurs less when roof caving is easy,and rock burst occurs less when roof caving is easy.The specific situation is analyzed in detail in the paper.This graduation thesis takes No.183 lower 04 working face of Jining No.3 Coal Mine of Yanzhou Mining Group as the research object,combines with reality,analyses the conditions and influencing factors of coal mine rock burst occurrence,explores and studies the risk analysis and evaluation of coal mine underground working face rock burst and anti-scour treatment methods.On the basis of the previous studies,the monitoring and prevention schemes of the impact hazard of the working face are further formulated to ensure the smooth mining of the working face.Because the research object is in the stage of putting into operation and lasts for a long time,the author studies and analyses the prevention and control of the impact and ground pressure in several key links and periods,and expects to form a practical one.Evaluation and prevention plan,and summed up the risk analysis and evaluation of rock burst in coal mine working face and the system solution ideas and methods of anti-scour treatment.Compared with other analysis and design methods in China,this method simplifies the process and has high safety.It can be used in the prevention and control of rock burst in most large-scale mining areas in China.