Research Of Energy Characteristics Of Rock Burst Of Daanshan Coal Mine

Daanshan coal mine belongs to Beijing Haohua Energy Limited Corporation.Mine field has complex geological structure.The main composition in geological structure is folding structure. Daanshan coal mine has 3 rock bursts in the mining process and rock bursts are located at synclinal axis.Synclinal axis has the stress and energy accumulation. With the increase of mining depth,the degree of rock burst harm show a clear upward trend and threaten to the safety of coal production.Therefore,launched a research on geological dynamic conditions,stress and energy characteristics of rock burst of Daanshan coal mine has important meaningThe study is based on the underground pressure and the rock layer control theory and comprehensive and use theory analysis, experimental test and numerical calculation.It analysis geological dynamic conditions of rock burst,disturbance stress changes and energy changes.Analysing stress measurement results determine that Daanshan coal mine is in tectonic stress field.It evaluates the risk of rock burst occurrence in Daanshan coal mine by the point of view of geological dynamic conditions and determines the risk of rock burst.Using FLAC3D numerical calculation anlysis disturbance stress changes in mining process and effects of coal pillar on rock burst in the east three working face in +550m synclinal axis 10 coal seam.It establishes the "coccoid form" rock burst dynamic system and analysis dynamic system scale and energy characteristics.It put forward the rock burst dynamic system energy criterion.The east three working face in +550m synclinal axis 10 coal seam has the energy conditions of rock burst. Using geological dynamic conditions and energy point evaluate the risk of rock burst of the west three working face in +400m synclinal axis 10 coal seam and the east four working face in +400m synclinal axis 13 coal seam.The two working faces have the risk of rock burst.The research results show that it has the geological dynamic conditions,stress conditions and energy conditions of rock burst. It reveals the control action of energy characteristics and stress to rock burst and provides theoretical foundation and scientific basis for the prediction and prevention of rockburst in Daanshan coal mine.