高寒地区矿山爆破振动对岩石边坡的响应特征分析

针对高寒地区爆破振动对岩石边坡响应特征的分析较少。为了研究高寒地区爆破振动衰减规律以及对边坡的响应特征，选取矿区岩石试件分别在-25℃和+20℃条件下进行了岩石波阻抗的测试试验；在6月至8月、11月至翌年1月分别对边坡展开了爆破振动监测试验，进而基于数值模拟手段，对比分析了岩石边坡在6月至8月、11月至翌年1月条件下的响应特征。研究结果表明，-25℃条件下的岩石试件波阻抗增大了28.5%；通过对边坡的爆破振动测试，揭示了11月至翌年1月的爆破振动峰值速度衰减特性；爆破荷载作用下，随着温度的降低，岩石边坡坡底部位的沉降位移呈增加趋势，主要是由于爆破振动衰减速率降低，延长了地震波对边坡的作用时间而造成了位移的增大，研究结果可为后期控制爆破振动对边坡的危害效应提供一定的指导意义。

Response characteristics of blasting vibration of mine to rock slope in alpine zone

The response characteristics of blasting vibration to rock slope in alpine zone are seldom analyzed. In order to study the attenuation law of blasting vibration and the response characteristics of slope in alpine zone, rock samples in mining area were selected to carry out rock wave impedance test at - 25 C and + 20 C respectively, and blasting vibration monitoring tests were carried out on slope from June to August, November to January of next year, respectively. Based on numerical simulation. The response characteristics of rock slope under the conditions of June to August, and November to January next year are compared and analyzed. The results show that the wave impedance of rock specimens increases by 28.5% at -25 C. The attenuation characteristics of peak velocity of blasting vibration from November to January of next year are revealed through the test of blasting vibration of slope. Under blasting load, the settlement displacement at the bottom of rock slope increases with the decrease of temperature, The main reason is that the attenuation rate of blasting vibration decreases, which prolongs the action time of seismic wave on the slope and increases the displacement. The research results can provide some guidance for controlling the harmful effect of blasting vibration on the slope in the later stage.