基于露天矿高陡边坡岩体的爆炸应力波响应仿真研究
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摘要
通过爆炸应力波在高陡边坡体远场传播的三自由度动力学模型,利用Matlab仿真了其动态响应过程。单点爆源的爆炸应力波激励的仿真结果表明,边坡岩体介质位移响应下部的最大,中部的次之,上部的最小,之间呈幂律关系衰减,同时具有明显的滞后效应;频率响应与位移响应相同,随着步长增加,高频成份迅速衰减。多点爆源的爆炸应力激励仿真结果表明,边坡岩体介质位移响应上部的最大,中间的次之,下部的最小,爆炸应力波在边坡顶部呈动力放大效应;频率响应则相反,下部最大,中部的次之,上部最小。仿真结果与现场测试结果相符。
Based on the three-degrees-of-freedom dynamics model set up for the far-field spreading of explosion stress wave in high-steep slope,the dynamic response process of explosion stress wave was simulated by Matlab engineering software.The simulation result of the explosion stress excitation of single point exploding spot showed that the medium displacement response at the bottom of slope was the biggest one was second at the middle part of slope,one was the smallest at the top of slope,and relation of them followed power law to attenuate,the displacement response had apparently hysteresis effect at the same time;the frequency response was same as displacement response,the high frequency of constituents quickly attenuated with the increase of steps.With respect to the explosion stress excitation of multipoint exploding spots,the simulation result showed that medium displacement response of slope rock at the top of slope was the biggest,one was second at the middle part of slope,one was the smallest at the bottom of slope,and the explosion stress wave had dynamic amplification effect at the top of slope;On the contrary,the frequency response was the biggest at the bottom of slope,it was second at the middle part of slope and it was the smallest at the top of slope.The simulation results matched with the results on site testing.
Based on the three-degrees-of-freedom dynamics model set up for the far-field spreading of explosion stress wave in high-steep slope,the dynamic response process of explosion stress wave was simulated by Matlab engineering software.The simulation result of the explosion stress excitation of single point exploding spot showed that the medium displacement response at the bottom of slope was the biggest one was second at the middle part of slope,one was the smallest at the top of slope,and relation of them followed power law to attenuate,the displacement response had apparently hysteresis effect at the same time;the frequency response was same as displacement response,the high frequency of constituents quickly attenuated with the increase of steps.With respect to the explosion stress excitation of multipoint exploding spots,the simulation result showed that medium displacement response of slope rock at the top of slope was the biggest,one was second at the middle part of slope,one was the smallest at the bottom of slope,and the explosion stress wave had dynamic amplification effect at the top of slope;On the contrary,the frequency response was the biggest at the bottom of slope,it was second at the middle part of slope and it was the smallest at the top of slope.The simulation results matched with the results on site testing.
引文
[1]姜立春.深凹露天矿高陡边坡失稳安全环境分析及工程控制研究[D].长沙:中南大学,2005.
[2]郭学彬,肖正学,等.爆破振动作用的坡面效应[J].岩石力学与工程学报,2001,20(1):83~86.
[3]Kumsar H,Aydan O,Ulusay R.Dynamic and static stability as-sessment of rock slops against wedge failure[J].Rock Mech.And Rock Eng,2000,33(1):31~51.
[4]姜立春,吴爱祥,等.散体结构边坡体振动波传播机理[J].中南工业大学学报(自然科学版),2003,34(6):678~682.
[5]张继春,彭琼芳.岩体爆破地震波衰减规律的现场试验与分析[J].辽宁工程技术大学学报(自然科学版),2001,20(4).
[6]孙玉科,等.中国露天矿边坡稳定性研究[M].北京:中国科学技术出版社,1999.
[7]Roger Goodall.Active Railway Suspensions:Implementation Sta-tus and Technological Trends[J].Vehicle System Dynamics,1997,28(2):87~118.
[8]朱浩,刘少军,黄中华.铁道车辆垂向主动悬挂的预见控制[J].中国铁道科学,2005,26(12):90~95.
[9]任中全,郭世伟,何万库.振动系统的时频域仿真分析研究[J].计算机仿真,2002,(19):97~100.
[10]姜立春,陈嘉生.新桥高陡边坡体失稳形变原因及工程控制[J].矿业研究与开发,2004,24(4):58~66.
[11]长江三峡工程重大地质与地震问题研究编写组.长江三峡工程重大地质与地震问题研究[M].北京:地质出版社,1992.
[12]刘亚群,李海波,李俊如.爆破荷载作用下黄麦岭磷矿岩质边坡动态响应的UDEC模拟研究[J].岩石力学与工程学报,2004,23(21):3659~3663.
[13]李俊如.爆破荷载作用下岩石边坡动态响应的FLAC3D模拟研究[J].爆破,2005,22(4):8~13.
[2]郭学彬,肖正学,等.爆破振动作用的坡面效应[J].岩石力学与工程学报,2001,20(1):83~86.
[3]Kumsar H,Aydan O,Ulusay R.Dynamic and static stability as-sessment of rock slops against wedge failure[J].Rock Mech.And Rock Eng,2000,33(1):31~51.
[4]姜立春,吴爱祥,等.散体结构边坡体振动波传播机理[J].中南工业大学学报(自然科学版),2003,34(6):678~682.
[5]张继春,彭琼芳.岩体爆破地震波衰减规律的现场试验与分析[J].辽宁工程技术大学学报(自然科学版),2001,20(4).
[6]孙玉科,等.中国露天矿边坡稳定性研究[M].北京:中国科学技术出版社,1999.
[7]Roger Goodall.Active Railway Suspensions:Implementation Sta-tus and Technological Trends[J].Vehicle System Dynamics,1997,28(2):87~118.
[8]朱浩,刘少军,黄中华.铁道车辆垂向主动悬挂的预见控制[J].中国铁道科学,2005,26(12):90~95.
[9]任中全,郭世伟,何万库.振动系统的时频域仿真分析研究[J].计算机仿真,2002,(19):97~100.
[10]姜立春,陈嘉生.新桥高陡边坡体失稳形变原因及工程控制[J].矿业研究与开发,2004,24(4):58~66.
[11]长江三峡工程重大地质与地震问题研究编写组.长江三峡工程重大地质与地震问题研究[M].北京:地质出版社,1992.
[12]刘亚群,李海波,李俊如.爆破荷载作用下黄麦岭磷矿岩质边坡动态响应的UDEC模拟研究[J].岩石力学与工程学报,2004,23(21):3659~3663.
[13]李俊如.爆破荷载作用下岩石边坡动态响应的FLAC3D模拟研究[J].爆破,2005,22(4):8~13.
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