爆破作用下坝体浸润线变化对尾矿坝稳定性的影响

基于矿山采场爆破振动实测数据和实际运行尾矿库，建立爆破振动作用下浸润线对尾矿坝稳定性影响的有限元计算模型，通过设计尾矿坝体内不同浸润线高程和采场爆破振动强度，研究采场爆破振动对尾矿坝抗滑安全系数的影响。研究表明：尾矿坝体内浸润线位置对尾矿坝抗滑稳定系数影响十分显著，浸润线越高，抗滑稳定系数越低。对于浸润线水位正常的尾矿坝，爆破振动加速度在0~0333g时，尾矿坝抗滑稳定系数随着振动强度的增加而增加；当爆破振动强度大于0333g时，尾矿坝的抗滑稳定系数则呈现几乎直线下降。运用Matlab拟合函数公式得到了爆破振动加速度与尾矿坝抗滑稳定系数间关系式。对于浸润线过高造成的病库和危库，在爆破振动作用下，浸润线对尾矿坝抗滑稳定稳定系数的影响则更加显著，尾矿坝抗滑稳定系数呈近乎直线下降。

Tailings Dam Stability Affected by Saturation Line under the Blasting

Based on the measured blasting vibration data of the mine stope and the actual tailings' operation，the finite element model to study the saturation line's effect on tailings dam's stability is built，and the influences of the stope blasting vibration to tailings dam's anti-sliding safety factor are researched under different elevation of saturation line and different stope blasting vibration intensity The research shows that the anti-sliding stability factor of the tailing dam is significantly influenced by the elevation of saturation line The higher the elevation of saturation line is，the lower the anti-sliding stability factor is For a tailings dam with normal elevation of saturation line，the anti-sliding stability factor increases with the increasing of vibration intensity when the blasting vibration intensity is between 0~0333g，and the anti-sliding stability factor almost decreases linearly when the blasting vibration intensity is greater than 0033g The anti-sliding stability factor' function of blasting vibration intensity is fitted by Matlab to gain their relationship For the ill-tailings dam and danger tailings dam caused by high elevation of saturation line，the anti-sliding stability factor is more significantly affected by the elevation of saturation line，and even linearly decreased.