Research On The Influence Of Blasting Vibration On High And Steep Slope Stability And The Control Technology

The stability of open-pit slope affects both the security of equipments and workers in normal production and economic benefits of mine. The altitude difference and slope angle of TongShankou Open-pit copper mine's east and south permanent slope is nearly 120m and up to 55°.Because of complex engineering geological conditions and the local villagers'excavation as well as the frequent mining blasting and other factors,its stability has become one of key constraining factors in production. Therefore,to study the influence of blasting vibration to the high-steep slope stability and propose scientific and rational blasting vibration control measures is very important.The following research work was carried out based on existing research:(1)The basic situation of Tongshankou copper mine open-pit slope engineering and hydrological geological conditions was reached by analyzing the mining geology and hydro-geology of the open-pit.(2) Basied on the blast vibration monitoring of the slope near 10# and 22-23# exploration line,blasting vibration attenuation rule in high and steep slope has been obtained by using empirical formula to regresse and anlyse the monitoring result.(3)Selected two typical slope sections,using FLAC/FLAC3D to anslyze the high and steep slope stability and to obtain the slope safety factor,the slope stress and displacement distribution in equilibrium state.(4) The effect of blasting vibration on the slope stability was simulated by using ANSYS/LS-DYNA and obtained the response characteristics of high and steep slope.(5)The correlation degree of blasting vibration characteristic parameters and the blasting condition was analyzed by using the Path Coefficient Analysis Method.It provides the theory basis for the research of blasting vibration control parameters and measures. (6)According to the slope engineering geological conditions and the characteristics of slope distribution,the reasonable blasting vibration control measures have been acquired through field experiments.