露天爆破地震动态模拟分析的一种新方法
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摘要
以南芬露天铁矿生产爆破和主运输平硐为研究对象,依据现场测试的大量爆破振动数据,利用瞬态有限单元法对人工爆破过程进行模拟。提出了一种基于位移等效原则的突加动荷分析方法,通过该方法对平硐稳定性进行了分析,给出了系统的阻尼系数、极限抗震速度和临界单段药量。结果表明,该方法简便有效。
Used the open-|pit blasting of Nanfen Iron Open-|pit Mine and its main haulage tunnel as work background,according to the great number of tested data of blast vibration,a new sudden applied load method based on displacement equivalent principle was set forth to simulate the process of blast seismic wave propagation in rock medium by Dynamic FEM.The stability of the tunnel was analyzed in this method.The damping factor,the ultimate quantity of explosive per blast and the ultimate endurable speed of the tunnel system were obtained.The results indicate that the method is easy and effective.
Used the open-|pit blasting of Nanfen Iron Open-|pit Mine and its main haulage tunnel as work background,according to the great number of tested data of blast vibration,a new sudden applied load method based on displacement equivalent principle was set forth to simulate the process of blast seismic wave propagation in rock medium by Dynamic FEM.The stability of the tunnel was analyzed in this method.The damping factor,the ultimate quantity of explosive per blast and the ultimate endurable speed of the tunnel system were obtained.The results indicate that the method is easy and effective.
引文
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(4)陶颂林,爆破工程[J].北京:冶金工业出版社,1979.
(5)张凤鹏,马万昌,孙豁然,金校园.人工爆破地震特性的实验研究[J].金属矿山,2004(12):19-22.
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