Analysis on dynamic responses of flood control dam for surface mine under blasting earthquake
YANG Hanhong
ZHOU Yongli
LI Shenglin
Abstract：In order to prevent castblasting Heidaigou surface mine safety mine flood control dam damage,finite element numerical simulation technology based on FLAC3D,it was established in anhydrous conditions and calculation scheme of water conditions under the two conditions of Xigeben safety and stability of flood control dam,safety parameters were determined by field monitoring and numerical simulation,the establishment of the dynamic response model under the condition of surface mine flood control dam blasting vibration,studies the mechanism of flood control dam dynamic response,the blasting vibration wave frequency and the risk of lateral critical damage threshold velocity.The results showed that the most unfavorable to the maximum flood control dam frequency response of the structure 2 Hz;the dam in the cast blasting,corresponding to the dam transverse wave direction threshold velocity was 24 cm/s,vertical threshold speed was 13 cm/s;under the condition of water,throwing blasting,the damage threshold of lateral critical speed was 9.6 cm/s.
Keywords：surface mineflood control damblasting earthquakedynamic responses
Publication Date：2017-01-01