Study On The Stability Of Stope And Filling Body Under The Effect Of Underground Deep-hole Blasting Vibration

To the underground of Sijiaying mining field of the deep hole blasting as the background. Using the combination of field observation and numerical simulation method, the underground deep hole blasting seismic wave propagation and the influence of mined out area and filling body stability of the stope were more in-depth studies.Blasting seismic wave observation scheme is made in the field of rock blasting engineering geological conditions. Based on the actual production of underground mine blasting, though surveing the conditions of blasting engineering that the field of rock, the monitoring plan of blasting seismic wave.Though the Classification of field measured vibration data, so there will be an important realistic significance and research value to study the effect of terrain on the blasting seismic wave. Using the wavelet package analysis method, the energy is mainly concentrated in the 7.8125~15.625 Hz and23.4375~31.25 Hz two bands when the seismic wave is transmitted to the surrounding.The total energy of the seismic wave is 27.8% and 40.1%. After finishing, the measured data are analyzed by MATLAB, and the K, α value of the seismic wave propagation along different directions is fitted. By the value of K and α in the different directions, the attenuation law of the underground mining field is determined by the spatial structure of the mining method and the mining conditions.By analyzing the dynamic tensile strength of the rock, the dynamic stress ratio of the surrounding rock is calculated, and the dynamic stress ratio is used as the criterion to judge the failure of surrounding rock in the goaf. The results show that when DSR≤0.07,blasting vibration of goaf has almost no effect, when the DSR≥0.128, blasting vibration begins to have an impact on the goaf and with the increase of the DSR, the condition become more serious.Use the Numerical simulation of surrounding rock and filling body with the finite element numerical simulation software Plaxis and Ls-dyna. Thongh the simulation analysis results, the surrounding rock and the filling body in the blasting vibration state are increased, and the shear strength of the surrounding rock and the filling body is more than the shear strength. The safe velocity range of goaf is 0~15.90cm/s, and the safe velocity range of filling body is 0~16.82cm/s.