天然裂缝在危岩体清除爆破中的减振效果研究
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摘要
分析巫山望霞危岩体削方爆破振动监测结果,发现爆破振动速度与常规经验公式计算得到的结果相差较大,利用ANSYS—AUTODYN数值模拟软件进行分析得知,危岩体的裂缝对爆破振动速度的减振效果达到33.9%,随着裂缝数目的增加,其减振效果也提高。该结果对同类危岩体治理工程的爆破参数设计提供了优化依据。
Data from blasting vibration monitoring of unstable rock mass at Wushan shows that the blasting vibration velocity is greatly different from the calculated vibration velocity with empirical formula.The software ANSYS—AUTODYN is used to simulate the blasting vibration.The simulated data shows that the blasting vibration is reduce 33.9% due to the cracks effect in the unstable rock mass.With the increasing of number of cracks,the vibration damping effect also increases.Results from this study provides optimized basis for blast parameters design in similar rock management.
Data from blasting vibration monitoring of unstable rock mass at Wushan shows that the blasting vibration velocity is greatly different from the calculated vibration velocity with empirical formula.The software ANSYS—AUTODYN is used to simulate the blasting vibration.The simulated data shows that the blasting vibration is reduce 33.9% due to the cracks effect in the unstable rock mass.With the increasing of number of cracks,the vibration damping effect also increases.Results from this study provides optimized basis for blast parameters design in similar rock management.
引文
[1]梁开水,陈天珠,易长平.减震沟减震效果的数值模拟研究[J].爆破,2006,23(3):18-21.[1]LIANG Kai-shui,CHEN Tian-zhu,YI Chang-ping.Numericalsimulation for vibration-isolating effect of vibration isolatingslot[J].Blasting,2006,23(3):18-21.(in Chinese)
[2]张志呈,肖正学.工程爆破中构造断层的隔振效应[J].西部探矿工程,2005,108(6):121-123.[2]ZHANG Zhi-chen,XIAO Zheng-xue.Engineering blastingof the structure of the fault isolation effect[J].West-Chi-na Exploration Engineering,2005,108(6):121-123.(inChinese)
[3]冯叔瑜,马乃耀.爆破工程[M].北京:中国铁道出版社,1980.
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[5]张志呈,肖正学.工程爆破地震波的裂隙效应[J].西南科技大学学报,2004,9(3):57-62.[5]ZHANG Zhi-chen,XIAO Zheng-xue.The crack effect ofthe earthquake wave from the engineering blasting[J].Journal of SWUST,2004,9(3):57-62.(in Chinese)
[2]张志呈,肖正学.工程爆破中构造断层的隔振效应[J].西部探矿工程,2005,108(6):121-123.[2]ZHANG Zhi-chen,XIAO Zheng-xue.Engineering blastingof the structure of the fault isolation effect[J].West-Chi-na Exploration Engineering,2005,108(6):121-123.(inChinese)
[3]冯叔瑜,马乃耀.爆破工程[M].北京:中国铁道出版社,1980.
[4]卢文波,赖世骧.岩石钻爆开挖中预裂缝的隔振效果分析[J].爆炸与冲击,1997,7(3):193-198.[4]LU Wen-bo,LAI Shi-rang.Analysis of vibration isolatingeffect of pre-splitting crack in rock excavation by blasting[J].Explosion and Shock Waves,1997,7(3):193-198.(in Chinese)
[5]张志呈,肖正学.工程爆破地震波的裂隙效应[J].西南科技大学学报,2004,9(3):57-62.[5]ZHANG Zhi-chen,XIAO Zheng-xue.The crack effect ofthe earthquake wave from the engineering blasting[J].Journal of SWUST,2004,9(3):57-62.(in Chinese)
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