露天矿爆破振动对建(构)筑物稳定性影响研究
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摘要
采用试验和数值模拟的方法研究了露天矿爆破振动对矿山附近的边坡及民用建筑动力稳定性的影响。试验结果表明:露天采场当前爆破振动条件下,民房处的最大三维合成振速远小于安全允许质点振动速度,说明爆破振动对民房影响不大,数值模拟结果验证了这一结论,而边坡的最大三维振速在安全允许质点振动速度范围内。数值模拟得到了边坡在爆破振动条件下的安全系数范围1.742～1.843,说明边坡在爆破振动条件下处于稳定状态。因此采用《爆破安全规程》判定和数值模拟分析相结合的方法能够有效地对建(构)筑物的稳定性进行评价。
Experiments and numerical simulation were conducted to study the effect of explosive vibration on the stability of slope and civil constructions which are close to the open pit mine.Experiment results show that: under the current explosion vibration at open pit mine,the maximum three dimensional combined vibration velocity is much less than the allowable safety velocity,thus concluding that the explosive vibration has little effect on the stability of the civil construction.The simulation results have verified the conclusion.Meanwhile the maximum three dimensional combined vibration velocity of the slope is within the range of allowable safety velocity.The safety factors of the slope under explosive vibration ranged from 1.742 to 1.843 through numerical simulation method,indicating that the slope is in stable state under explosive vibration.With both the criterion of Safety Regulations for Blasting and the numerical simulation analysis,the stability of constructions can be effectively estimated.
Experiments and numerical simulation were conducted to study the effect of explosive vibration on the stability of slope and civil constructions which are close to the open pit mine.Experiment results show that: under the current explosion vibration at open pit mine,the maximum three dimensional combined vibration velocity is much less than the allowable safety velocity,thus concluding that the explosive vibration has little effect on the stability of the civil construction.The simulation results have verified the conclusion.Meanwhile the maximum three dimensional combined vibration velocity of the slope is within the range of allowable safety velocity.The safety factors of the slope under explosive vibration ranged from 1.742 to 1.843 through numerical simulation method,indicating that the slope is in stable state under explosive vibration.With both the criterion of Safety Regulations for Blasting and the numerical simulation analysis,the stability of constructions can be effectively estimated.
引文
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[2]龚建伍,夏才初,郑志东,等.鹤上三车道小净距隧道爆破振动测试与分析[J].岩石力学与工程学报,2007,26(9):1882-1887.
[3]傅洪贤,赵勇,谢晋水,等.隧道爆破近区爆破振动测试研究[J].岩石力学与工程学报,2011,30(2):335-340.
[4]晏俊伟,龙源,方向,等.基于小波变换的爆破振动信号能量分布特征分析[J].爆炸与冲击,2007,27(5):405-410.
[5]关晓磊,颜景龙.爆破振动信号的HHT时频能量谱分析[J].爆炸与冲击,2012,32(5):535-541.
[6]吴贤振,冯锐,陆哲祥.分宜矿白云石采石场爆破震动测试研究[J].江西理工大学学报,2009,3(2):6-9.
[7]GB6722—2011爆破安全规程[S].北京:中国标准出版社,2011.
[8]刘殿中,杨仕春.工程爆破使用手册[M].北京:冶金工业出版社,2003.
[9]宗琦,汪海波,周胜兵.爆破地震效应的监测和控制技术研究[J].岩石力学与工程学报,2008,27(5):938-945.
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