Abstract:
In order to analyze the stability of adjacent open-pit roadway under blasting vibration, blasting vibration monitoring test is carried out.Through the investigation of the general situation of the mine project and blasting parameters, the monitoring scheme is designed and the monitoring results are statistically analyzed.The results show that the maximum blasting vibration speed is 3.53 cm/s, which is less than the limit value of 5 cm/s; the three-direction vibration velocity attenuation equation can better describe the vibration velocity attenuation law; the blasting vibration velocity decreases with the increase of the blast center distance, and the blasting vibration velocity decays the fastest in the vertical direction, followed by the radial direction, and the slowest attenuation in the horizontal direction.Based on the main frequency of each monitoring point, the oscillation frequency distribution range between 20-100 Hz is wide, and the maximum value is higher; under the premise of not considering the accumulation of blasting damage caused by repetition, the blasting vibration of open-pit excavation will not cause the damage of the flat shaft.