Numerical Simulation Research On Blasting Vibration About Chamber Blasting With Linear Charge

A great deal of research has been done on the coyote blasting with the column and strip-shaped charge by the scholars from home and abroad.All of these work is based on the monitor. To the different situation's internal stress and the vibration weaken situation is also unknown, must therefore conduct the research to it, but the scene test is impossible not to be nonessential .However, no substantial breakthrough has been gained in the studies of the experiment and theory of the coyote blasting with the column and strip-shaped charge due to the defects of experimental methods and mathematical models. So the vibration effects of blasting is known a little.Therefore, the application and spread of the coyote blasting with the column and strip-shaped charge have been limited.The paper by the attenuation regulation and distributing character of stress wave under the linear charge blasting, the paper sum up the idea that the columniation stress wave can be regarded as cylinder stress wave, the end stress wave as spherical wave.The perfect stress attenuation formula in radical direction is established in complete elastic medium. Meanwhile, the ANSYS-DYNA software is applied for the analysis of the computer numerical simulation about the carried experiment.On the foundation, the paper establish the stress attenuation formula on the radical direction under linear charge blasting, which, is also has been validated by the test result. Then, the DYNA-2D software is applied for analysis of the computer numerical simulation about stair slope's earth quake effect of the coyote blasting with the column and strip-shaped charge, the main outcomes are as follows:(1) Based on properties of rock mass and parameters of explosive, which is simulated with LS-DYNA program, the numerical results of explode loads on rock mass are agree well with the results of that corresponding experience formula .With the explode loads on rock mass, it is founded that the results of numerical simulation agree well with the spot experimental monitoring results,and the maximum error is 21.6% . Because of these, the numerical simulatin is testified resonable and practical.(2) By applying ANSYS-DYNA3D program, a numerical simulation study had been made on the condition that the column and strip-shaped charge is detonated at mid-point respectively with one exploding speeds, i.e. v=5500m/s.The rule for the stress field as well as the displacement field of the column and strip-shaped charge at the special speed and in one detonating points has been gained accordingly.(3) The number of the slope's angle and the minum resistance line keep the same .By applying ANSYS-DYNA2D program, a numerical simulation study had been made on the condition that the column and strip-shaped charge of different burried-depth.The rule for the stress field as well as the displacement field of the column and strip-shaped charge on the midperpendicular shi the great. The demolition vibration from the hillside high place to the low spot dissemination, lower part the toe of slope hollow terrain place vibration peak-to-peak value will receive suppresses, but the earthquake wave has the obvious scale-up effect with it opposite direction dissemination, the maximum value achieves 3.23 times(4)Along with the blast weight increase, is away from a same about ground computation it with the medical pouch to inspire fast also increases, inspires fast is proportional the relations with the weight.