爆破振动对临近尾矿坝的影响分析

Influence of Blasting Vibration on Tailings Dams Nearby

为研究爆破振动对临近尾矿坝的影响,以临近尾矿坝的某公司山梁爆破为工程背景,进行了5组不同参数下的现场爆破试验。监测的尾矿坝坝体爆破的振动主频在0~50 Hz之间。通过监测结果拟合萨道夫斯基经验公式,模拟实际爆破条件下尾矿坝的振动载荷,并计算了尾矿坝在实际爆破方案和放大的爆破载荷下的振动响应和坝体稳定性。通过分析爆破速度阈值与坝体稳定安全系数间的关系,得出本尾矿坝安全允许质点速度为3 cm/s。在设计爆破方案条件下,受爆破振动影响最危险的区域位于堆积坝713.0 m标高处,初期坝的最大振速为0.220 cm/s,堆积坝的最大振速为0.157 cm/s,满足尾矿坝的安全允许质点速度要求。

In order to study the impact of blasting vibration on the tailings dam nearby,five sets of different parameters were taken for on-site blasting tests in the mountain beam blasting near a tailings dam.The main frequency of blasting vibration of the tailings dam body is 050 Hz.The monitoring results were fitted with the Sodovsky empirical formula to simulate the vibration load of the tailings dam under actual blasting conditions.The vibration response and dam stability of the tailings dam under actual blasting schemes and amplified blasting loads were calculated.Based on the relationship between the blasting velocity threshold and the stability safety factor of the dam,it is determined that the allowable particle velocity for the safety of this tailings dam is 3 cm/s.In the designed blasting plan,the most dangerous area affected by blasting vibration is located at the elevation of 713.0 meters in the accumulation dam.The maximum vibration speed of the initial dam is 0.220 cm/s,and the maximum vibration speed of the accumulation dam is 0.157 cm/s.It meets the requirements of safety allowable particle velocity for tailings dams.It meets the allowable particle velocity requirement for the safety of the tailings dam.