Numerical Simulation Research On Blasting Disturbance Inducing Coal Mine Rock Burst

Rock burst is a phenomenon that suddenly coal and rock were fiercely destroyed, which main show is that a large number of coal and rock fling at roadway, and destroyed a few even 100 meters of the roadway or the coal workface instantly, causing mine support equipment wreck, roof sinking and floor expansion and so on. Due to its complex formation mechanism and a multitude of influence factors, rock burst is a difficult problem of the research in coal mine exploiting.The article take the Xin Zhouyao coal mine as the engineering background, and the effect of the dynamic desturbance to rock burst was analysed in depth, the main contents and results are as follows:(1) The mechanics characristics of coal and rock under dynamic loadings the dynamic mechanical characristics of coal and rock under stress wave were analysed probably.(2) 8935 working face in west 2 panel Xinzhouyao mine has worked as a test part, the rock physical and mechanical parameters experiments, the impact tendency experiment and the SHPB experiment have been made, the uniaxial compressive strength?strength of extension elasticity modulus and Poisson's ratio of coal and rock and so on basic mechanical parameters, the impact tendency standard and mechanical characristics of coal and rock under dynamic loading were acquired.(3) Combining with the actual geological conditions of Xinzhouyao mine, the numerical analysis model is established, the numerical simulation of rock burst risk caused by blasting dynamic loading through bringing to bear viscous boundary and blasting seismic on FLAC3D dynamic analysis module has been made, the field of stress?displacement field of roadway and surrounding rock under blasting dynamic loading?velosity and accelaration of monitoring point at roadway surface were achieved, and the influences and characristics of roadway and surrounding rock under blasting dynamic loading were analysed.