爆破振动对排土场稳定性影响的数值模拟研究  

Numerical Simulation of Blasting Vibration on the Dump Stability

作　　者：朱晓玺 张云鹏[1] 张亚宾[1] 武旭[1] 

机构地区：[1]华北理工大学河北省矿业开发与安全技术重点实验室,河北唐山市063000

出　　处：《矿业研究与开发》2015年第6期105-107,共3页Mining Research and Development

基　　金：河北省高等学校科学研究项目(ZD2014037)

摘　　要：采用数值模拟方法,结合某矿排土场的实际情况,研究不同爆破水平振动强度对该排土场边坡稳定性的影响,提出边坡能够承载的水平临界破坏振速和保障边坡稳定的安全振速。模拟结果表明,在不考虑爆破水平振动荷载的情况下,排土场边坡处于稳定状态;当考虑爆破水平振动荷载时,边坡安全系数随着爆破振速的增加而降低。取有爆破振动荷载时的边坡安全系数为1.05,主振相频率27~28 Hz,计算得出边坡安全允许振速为11.35cm/s,边坡处于破坏的临界状态时,计算得出边坡的临界破坏振速为13.3cm/s。Combined with the practical situation of a mine dump,the influence of different blasting strength of horizontal vibration on the slope stability of the dump was studied by numerical simulation.A horizontal vibration velocity of critical failure which the slope could bear and a security allowed velocity to guarantee the slope stability were proposed.The simulated results indicated that the dump was in the steady state without considering the horizontal blasting vibration loads.If considering,the slope safety factor decreased with the increasing of blasting vibration velocity.When the slope safety factor was 1.05 with considering blasting vibration,and main vibration frequency was 27~28Hz,the safety vibration velocity was calculated as 11.35cm/s for the slope.The critical failure vibration velocity was calculated as 13.3cm/s for the slope under a critical state of destruction.

关 键 词：爆破振动 排土场 边坡稳定 安全允许振速 数值模拟 

分 类 号：TD854.7[矿业工程—金属矿开采]