双根并联恒阻大变形锚杆吸收冲击能量研究
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摘要
为了研究恒阻大变形锚杆在动力冲击作用下的吸能规律,开展了双根并联恒阻大变形锚杆动态冲击拉伸实验。实验结果表明:随着冲击速度的增加,恒阻大变形锚杆的工作阻力和伸长量均越来越大,恒阻大变形锚杆伸长单位长度吸收的能量增加。双根并联恒阻大变形锚杆冲击力时程曲线可见两个峰值,第二个峰值总是小于第一个峰值,即当多个恒阻大变形锚杆并联工作时,其冲击力响应水平是逐个衰减,能够有效缓解冲击效应。同时,采用红外热成像法对恒阻大变形锚杆和普通锚杆冲击过程中的温度场变化进行监测,对比研究二者吸能特性,实验表明,与普通锚杆相比,恒阻大变形锚杆吸能效果更好,更利于巷道防冲支护。
The elongation and impacting experimental system was used to study the energy characteristics under the dynamic impact of two constant resistance and large deformation bolts( named CRLD bolt in this paper).Experimental results indicate that,as the impact velocity increases,the working resistance and elongation increase so as the energy consumption per unit length of CRLD bolt. The time history curve of two CRLD bolts has obvious double-peak phenomenon and the second peak is lower than the first peak. This is the result of not being fully synchronized with the shock,it means that when several CRLD bolt working together the supporting force is decreasing,so by this way can reduce the impact. Besides,it is also research the energy absorption characteristics of CRLD and traditional bolt with the infrared thermal imaging technology. The experiment result shows that the energy absorption characteristics of CRLD bolt is better.
The elongation and impacting experimental system was used to study the energy characteristics under the dynamic impact of two constant resistance and large deformation bolts( named CRLD bolt in this paper).Experimental results indicate that,as the impact velocity increases,the working resistance and elongation increase so as the energy consumption per unit length of CRLD bolt. The time history curve of two CRLD bolts has obvious double-peak phenomenon and the second peak is lower than the first peak. This is the result of not being fully synchronized with the shock,it means that when several CRLD bolt working together the supporting force is decreasing,so by this way can reduce the impact. Besides,it is also research the energy absorption characteristics of CRLD and traditional bolt with the infrared thermal imaging technology. The experiment result shows that the energy absorption characteristics of CRLD bolt is better.
引文
[1]何满潮,冯吉利.恒阻大变形锚杆[P].中国专利:CN101858225A,2010-10-13.(He Manchao,Feng Jili.Constant resistance and large deformation bolts[P].China Patent:CN101858225A,2010-10-13.(in Chinese))
[2]何满潮,郭志飚.恒阻大变形锚杆力学特性及其工程应用[J].岩石力学与工程学报,2014,33(7):1297-1308.(He Manchao,Guo Zhibiao.Mechanical property and engineering application of anchor bolt with constant resistance and large deformation[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(7):1297-1308.(in Chinese))
[3]何满潮,王炯,孙晓明,等.负泊松比效应锚索的力学特性及其在冲击地压防治中的应用研究[J].煤炭学报,2014,39(2):214-221.(He Manchao,Wang Jiong,Sun Xiaoming,et al.Mechanics characteristics and applications of prevention and control rock bursts of the negative Poisson’s ratio effect anchor[J].Journal of China Coal Society,2014,39(2):214-221.(in Chinese))
[4]He M C,Gong W L,Wang J,et al.Development of a novel energy-absorbing bolt with extraordinarily large elongation and constant resistance[J].International Journal of Rock Mechanics and Mining Sciences,2014,67(1):29-42.
[5]何满潮,李晨,宫伟力,等.恒阻大变形锚杆/索支护原理及大变形控制技术[J].岩石力学与工程学报,2016,35(8):1513-1529.(He Manchao,Li Chen,Gong Weili,et al.Support principles of CRLDbolts/cables and control techniques of large deformation[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(8):1513-1529.(in Chinese))
[6]郭志飚,王炯,张跃林,等.清水矿深部软岩巷道破坏机理及恒阻大变形控制对策[J].采矿与安全工程学报,2014,31(6):945-949.(Guo Zhibiao,Wang Jiong,Zhang Yuelin,et al.Failure mechanism and constant resistance large deformation control measures of deep soft rock in Qingshui Coal Mine[J].Journal of Mining&Safety Engineering,2014,31(6):945-949.(in Chinese))
[7]陶志刚,李海鹏,孙光林,等.基于恒阻大变形锚索的滑坡监测预警系统研发及应用[J].岩土力学,2015,36(10):3032-3040.(Tao Zhigang,Li Haipeng,Sun Guanglin,et al.Development of monitoring and early warning system for landslides based on constant resistance and large deformation anchor cable and its application[J].Rock and Soil Mechanics,2015,36(10):3032-3040.(in Chinese))
[8]李晨,何满潮,宫伟力.恒阻大变形锚杆负泊松比效应的冲击动力学分析[J].煤炭学报,2016,41(6):1393-1399.(Li Chen,He Manchao,Gong Weili.Analysis on impact dynamics of negative Poisson’s ratio effect of anchor bolt with constant resistance and large deformation[J].Journal of China Coal Society,2016,41(6):1393-1399.(in Chinese))
[9]He M C,Li C,Gong W L,et al.Dynamic tests for a Constant-Resistance-Large-Deformation bolt using a modified SHTB system[J].Tunneling and Underground Space Technology,2017,64:103-116.
[10]何满潮,李晨,宫伟力.恒阻大变形锚杆冲击拉伸实验及其有限元分析[J].岩石力学与工程学报,2015,34(11):2079-2187.(He Manchao,Li Chen,Gong Weili,et al.Elongation and impacting experimental system for bolts with constant resistance and large deformation and finite element analysis[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2079-2187.(in Chinese))
[11]赵善坤,刘军,王永仁,等.煤岩结构体多级应力控制防冲实践及动态调控[J].地下空间与工程学报,2013,9(5):1057-1064,1102.(Zhao Shankun,Liu Jun,et al.Dynamical control and multi-field stress control of rock burst prevention for coal-rock structure[J].Chinese Journal of Underground Space and Engineering,2013,9(5):1057-1064,1102.(in Chinese))
[12]江衡,窦林名,屈昀,等.综放工作面开采过程的矿震规律研究[J].煤矿开采,2010,15(1):11-14.(Jiang Heng,Dou Linming,Qu Jun,et al.Research on rules of shock bump in full mechanized caving mining face[J].Coal Mining Technology,2010,15(1):11-14.(in Chinese))
[13]王礼立,余同希,李永池.冲击动力学进展[M].合肥:中国科学技术大学,1992.(Wang Lili,Yu Tongxi,Li Yongchi.Advance of impact dynamics[M].Hefei:University of Science and Technology of China,1992.(in Chinese))
[14]李晨.恒阻大变形锚杆冲击拉伸动力学特性研究[D].北京:中国矿业大学(北京),2016.(Li Chen.Study on impacting and elongation dynamic mechanical characteristics of CRLD bolt[D].Beijing:China University of Mining and Technology(Beijing),2016.(in Chinese))
[15]崔堃鹏,夏禾,夏超逸,等.汽车撞击桥墩瞬态撞击力的等效静力计算[J].振动与冲击,2014,33(4):48-53,69.(Gui Kunpeng,Xia He,Xia Chaoyi,et al.Equivalent static force calculation methods for transient impact force of a vehicle in collision with piers[J].Journal of Vibration and Shock,2014,33(4):48-53,69.(in Chinese))
[16]王君杰,陈诚,汪宏,等.基于碰撞数值模拟的桥梁等效静力船撞力一基本公式[J].公路交通技术,2009,4(2):66-70.(Wang Junjie,Chen Cheng,Wang Hong,et al.Equivalent static force of ship impact to bridge based on impact numeric simulationfundamental formula[J].Technology of Highway and Transport,2009,4(2):66-70.(in Chinese))
[2]何满潮,郭志飚.恒阻大变形锚杆力学特性及其工程应用[J].岩石力学与工程学报,2014,33(7):1297-1308.(He Manchao,Guo Zhibiao.Mechanical property and engineering application of anchor bolt with constant resistance and large deformation[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(7):1297-1308.(in Chinese))
[3]何满潮,王炯,孙晓明,等.负泊松比效应锚索的力学特性及其在冲击地压防治中的应用研究[J].煤炭学报,2014,39(2):214-221.(He Manchao,Wang Jiong,Sun Xiaoming,et al.Mechanics characteristics and applications of prevention and control rock bursts of the negative Poisson’s ratio effect anchor[J].Journal of China Coal Society,2014,39(2):214-221.(in Chinese))
[4]He M C,Gong W L,Wang J,et al.Development of a novel energy-absorbing bolt with extraordinarily large elongation and constant resistance[J].International Journal of Rock Mechanics and Mining Sciences,2014,67(1):29-42.
[5]何满潮,李晨,宫伟力,等.恒阻大变形锚杆/索支护原理及大变形控制技术[J].岩石力学与工程学报,2016,35(8):1513-1529.(He Manchao,Li Chen,Gong Weili,et al.Support principles of CRLDbolts/cables and control techniques of large deformation[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(8):1513-1529.(in Chinese))
[6]郭志飚,王炯,张跃林,等.清水矿深部软岩巷道破坏机理及恒阻大变形控制对策[J].采矿与安全工程学报,2014,31(6):945-949.(Guo Zhibiao,Wang Jiong,Zhang Yuelin,et al.Failure mechanism and constant resistance large deformation control measures of deep soft rock in Qingshui Coal Mine[J].Journal of Mining&Safety Engineering,2014,31(6):945-949.(in Chinese))
[7]陶志刚,李海鹏,孙光林,等.基于恒阻大变形锚索的滑坡监测预警系统研发及应用[J].岩土力学,2015,36(10):3032-3040.(Tao Zhigang,Li Haipeng,Sun Guanglin,et al.Development of monitoring and early warning system for landslides based on constant resistance and large deformation anchor cable and its application[J].Rock and Soil Mechanics,2015,36(10):3032-3040.(in Chinese))
[8]李晨,何满潮,宫伟力.恒阻大变形锚杆负泊松比效应的冲击动力学分析[J].煤炭学报,2016,41(6):1393-1399.(Li Chen,He Manchao,Gong Weili.Analysis on impact dynamics of negative Poisson’s ratio effect of anchor bolt with constant resistance and large deformation[J].Journal of China Coal Society,2016,41(6):1393-1399.(in Chinese))
[9]He M C,Li C,Gong W L,et al.Dynamic tests for a Constant-Resistance-Large-Deformation bolt using a modified SHTB system[J].Tunneling and Underground Space Technology,2017,64:103-116.
[10]何满潮,李晨,宫伟力.恒阻大变形锚杆冲击拉伸实验及其有限元分析[J].岩石力学与工程学报,2015,34(11):2079-2187.(He Manchao,Li Chen,Gong Weili,et al.Elongation and impacting experimental system for bolts with constant resistance and large deformation and finite element analysis[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2079-2187.(in Chinese))
[11]赵善坤,刘军,王永仁,等.煤岩结构体多级应力控制防冲实践及动态调控[J].地下空间与工程学报,2013,9(5):1057-1064,1102.(Zhao Shankun,Liu Jun,et al.Dynamical control and multi-field stress control of rock burst prevention for coal-rock structure[J].Chinese Journal of Underground Space and Engineering,2013,9(5):1057-1064,1102.(in Chinese))
[12]江衡,窦林名,屈昀,等.综放工作面开采过程的矿震规律研究[J].煤矿开采,2010,15(1):11-14.(Jiang Heng,Dou Linming,Qu Jun,et al.Research on rules of shock bump in full mechanized caving mining face[J].Coal Mining Technology,2010,15(1):11-14.(in Chinese))
[13]王礼立,余同希,李永池.冲击动力学进展[M].合肥:中国科学技术大学,1992.(Wang Lili,Yu Tongxi,Li Yongchi.Advance of impact dynamics[M].Hefei:University of Science and Technology of China,1992.(in Chinese))
[14]李晨.恒阻大变形锚杆冲击拉伸动力学特性研究[D].北京:中国矿业大学(北京),2016.(Li Chen.Study on impacting and elongation dynamic mechanical characteristics of CRLD bolt[D].Beijing:China University of Mining and Technology(Beijing),2016.(in Chinese))
[15]崔堃鹏,夏禾,夏超逸,等.汽车撞击桥墩瞬态撞击力的等效静力计算[J].振动与冲击,2014,33(4):48-53,69.(Gui Kunpeng,Xia He,Xia Chaoyi,et al.Equivalent static force calculation methods for transient impact force of a vehicle in collision with piers[J].Journal of Vibration and Shock,2014,33(4):48-53,69.(in Chinese))
[16]王君杰,陈诚,汪宏,等.基于碰撞数值模拟的桥梁等效静力船撞力一基本公式[J].公路交通技术,2009,4(2):66-70.(Wang Junjie,Chen Cheng,Wang Hong,et al.Equivalent static force of ship impact to bridge based on impact numeric simulationfundamental formula[J].Technology of Highway and Transport,2009,4(2):66-70.(in Chinese))