节理充填岩体爆炸应力波传播规律模型试验与应用研究
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摘要
为研究节理厚度对爆炸应力波传播影响规律,以工程现场揭露的红黏土为充填介质,制作含节理爆破模型,开展不同厚度节理爆破模型试验,并对现场试验爆破参数进行优化。研究结果表明:节理充填介质延长了爆炸应力波传播时间并吸收了部分应力波,应力波衰减速率为2. 225～4. 188 MPa/mm,滞后时间0. 1～0. 15μs/mm;节理对不同方向的应力波吸收程度不同,横向应力的衰减速率大于纵向应力的衰减速率,二者均随节理厚度的增加呈线性衰减。爆破参数优化应控制炮孔至节理面的距离、减小装药量,周边孔宜采用空气间隔分段装药。
In order to study the influence laws of joint thickness on the propagation of blasting stress wave,a blasting model containing joint was established by using the red clay excavated in the engineering site as the filling medium. The blasting model tests under different joint thickness were carried out,and the blasting parameters of field tests were optimized. The results showed that the joint filling medium prolonged the propagation time of blasting stress wave and absorbed part of stress wave,the attenuation rate of stress wave was 2. 225-4. 188 MPa/mm,and the delay time was 0. 1-0. 15 μs/mm. The adsorption degree of joint on the stress wave in different directions were different,the attenuation rate of transverse stress was larger than that of longitudinal stress,and both of them attenuated linearly with the increase of joint thickness. When optimizing the blasting parameters,the distance between the blasting hole and the joint surface should be controlled,the charge quantity should be reduced,and the air interval deck charge should be used in the surrounding holes.
In order to study the influence laws of joint thickness on the propagation of blasting stress wave,a blasting model containing joint was established by using the red clay excavated in the engineering site as the filling medium. The blasting model tests under different joint thickness were carried out,and the blasting parameters of field tests were optimized. The results showed that the joint filling medium prolonged the propagation time of blasting stress wave and absorbed part of stress wave,the attenuation rate of stress wave was 2. 225-4. 188 MPa/mm,and the delay time was 0. 1-0. 15 μs/mm. The adsorption degree of joint on the stress wave in different directions were different,the attenuation rate of transverse stress was larger than that of longitudinal stress,and both of them attenuated linearly with the increase of joint thickness. When optimizing the blasting parameters,the distance between the blasting hole and the joint surface should be controlled,the charge quantity should be reduced,and the air interval deck charge should be used in the surrounding holes.
引文
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[11]郭易圆,李世海.离散元法在节理岩体爆破振动分析中的应用[J].岩石力学与工程学报,2002,21(S2):2408-2412.GUO Yiyuan,LI Shihai. Application of DEM in vibration analysis of jointed rock masses under blasting loading[J]. Chinese Journal of Rock Mechanics and Engineering,2002,21(S2):2408-2412.
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[13]杨仁树,许鹏,杨立云,等.节理岩体中爆炸应力波传播规律的研究[J].金属矿山,2016,(6):49-54.YANG Renshu,XU Peng,YANG Liyun,et al. Study of regularity of explosive stress wave propagation in jointed rock mass[J]. Metal Mine,2016,(6):49-54.
[14]赵坚,陈寿根,蔡军刚.用UDEC模拟爆炸波在节理岩体中的传播[J].中国矿业大学学报,2002,31(2):111-115.ZHAO Jian,CHEN Shougen,CAI Jungang. Simulation of blast wave propagation in jointed rock mass using UEDC[J]. Journal of China University of Mining and Technology,2002,31(2):111-115.
[15]李建军,段祝平.岩体中的节理裂隙对爆破影响的试验研究[J].矿冶工程,2005,25(5):1-3.LI Jianjun,DUAN Zhuping. Experimental study on the effect of jointed and fractured rock masses on blasting[J]. Mining and Metallurgical Engineering,2005,25(5):1-3.
[2]孙冰,袁登,曾晟,等.爆炸应力波在层状节理岩体中的传播规律试验研究[J].中国安全生产科学技术,2015,11(11):118-123.SUN Bing,YUAN Deng,ZENG Sheng,et al. Experimental study on propagation law of explosion stress wave in bedding joint rock mass[J]. Journal of Safety Science and Technology,2015,11(11):118-123.
[3]刘际飞,璩世杰.节理走向角度对爆炸应力波传播影响的试验研究[J].爆破,2014,31(2):57-61.LIU Jifei,QU Shijie. Experimental study of influence of joint angle of strike on explosive stress wave propagation[J]. Blasting,2014,31(2):57-61.
[4] WU C Q,HAO H,ZHOU Y X. Distinctive and fuzzy failure probability analysis of an anisotropic rock mass to explosion load[J]. International Journal for Numerical Methods in Engineering,2003,56(5):767-786.
[5]李业学,刘建锋,秦丽.应力波穿越岩石节理时能量耗散规律的实验研究[J].实验力学,2011,26(1):85-90.LI Yexue,LIU Jianfeng,QIN Li. Experimental study on rule of energy dissipation of stress wave across rock joint[J]. Journal of Experimental Mechanics,2011,26(1):85-90.
[6] ZHU J B,ZHAO J. Obliquely incident wave propagation across rock joints with virtual wave source method[J]. Journal of Applied Geophysics,2013,88:23-30.
[7] ZHU J B,ZHAO X B,WU W,et al. Wave propagation across rock joints filled with visco elastic medium using modified recursive method[J]. Journal of Applied Geophysics,2012,86:82-87.
[8]王卫华,李夕兵,周子龙,等.不同应力波在张开节理处的能量传递规律[J].中南大学学报(自然科学版),2006,37(2):376-380.WANG Weihua,LI Xibing,ZHOU Zilong,et al. Energy-transmitted rule of various stress waves across open joint[J]. Journal of Central South University(Science and Technology),2006,37(2):376-380.
[9]张秀丽,焦玉勇,刘泉声,等.节理对爆炸波传播影响的数值研究[J].岩土力学,2008,29(3):717-721.ZHANG Xiuli,JIAO Yuyong,LIU Quansheng,et al. Numerical study on effect of joints on blasting wave propagation in rock mass[J]. Rock and Soil Mechanics,2008,29(3):717-721.
[10]刘婷婷,李新平,李海波,等.应力波在充填节理岩体中传播规律的数值研究[J].岩石力学与工程学报,2016,35(S2):3552-3560.LIU Tingting,LI Xinpin,LI Haibo,et al. Numerical study on stress wave propagation across filled joints[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(S2):3552-3560.
[11]郭易圆,李世海.离散元法在节理岩体爆破振动分析中的应用[J].岩石力学与工程学报,2002,21(S2):2408-2412.GUO Yiyuan,LI Shihai. Application of DEM in vibration analysis of jointed rock masses under blasting loading[J]. Chinese Journal of Rock Mechanics and Engineering,2002,21(S2):2408-2412.
[12] FAN S C,JIAO Y Y,ZHAO J. On modeling of incident boundary for wave propagation in jointed rock masses using discrete element method[J]. Computers and Geotechnics,2004,31(1):57-66.
[13]杨仁树,许鹏,杨立云,等.节理岩体中爆炸应力波传播规律的研究[J].金属矿山,2016,(6):49-54.YANG Renshu,XU Peng,YANG Liyun,et al. Study of regularity of explosive stress wave propagation in jointed rock mass[J]. Metal Mine,2016,(6):49-54.
[14]赵坚,陈寿根,蔡军刚.用UDEC模拟爆炸波在节理岩体中的传播[J].中国矿业大学学报,2002,31(2):111-115.ZHAO Jian,CHEN Shougen,CAI Jungang. Simulation of blast wave propagation in jointed rock mass using UEDC[J]. Journal of China University of Mining and Technology,2002,31(2):111-115.
[15]李建军,段祝平.岩体中的节理裂隙对爆破影响的试验研究[J].矿冶工程,2005,25(5):1-3.LI Jianjun,DUAN Zhuping. Experimental study on the effect of jointed and fractured rock masses on blasting[J]. Mining and Metallurgical Engineering,2005,25(5):1-3.