王海洋;陈祥;卢保东;赵树磊;王杰;周宴民;
WANG Hai-yang;CHEN Xiang;LU Bao-dong;ZHAO Shu-lei;WANG Jie;ZHOU Yan-min;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University;School of Civil Engineering, Chongqing Jiaotong University;China Railway 16st Bureau Group Road & Bridge Engineering Co., Ltd.;

• 1:重庆交通大学山区桥梁与隧道工程国家重点实验室
• 2:重庆交通大学土木工程学院
• 3:中铁十六局集团路桥工程有限公司

摘要(Abstract)：

水压爆破应力波的传播过程决定了爆破的作用效果及影响范围，层状岩体中的层理面特征对水压爆破应力波的传播路径及衰减具有直接影响。为明确水压爆破应力波在层状岩体内的传播规律及影响因素，采用理论分析和数值模拟相结合的方法，研究了层理面位置及其介质属性对水压爆破应力波传播的影响规律。结果表明：水压爆破相对于常规爆破产生的初始应力更大，破碎效果更明显；水压爆破应力波传播至层理面时会发生反射和透射，导致层理面区域的岩体应力状态发生改变，使得临近层理面的入射应力峰值明显降低；层理面与爆源的距离越小，层理面对应力波传播和裂纹扩展的抑制作用越明显，随着该距离的增大，反射应力波会促进层理面与爆源间的裂纹扩展并诱导初始裂纹继续延伸，同时改变横向裂纹的扩展方向；层理面介质对应力波的传播和裂纹的扩散影响显著，层理面介质与岩体的性能差异越大，应力波在层理面的衰减越严重，降低了应力波的有效作用范围。
The propagation process of hydraulic blasting stress waves determines the effect and scope of blasting, and bedding plane features of layered rock mass have a direct influence on the propagation path and attenuation of hydraulic blasting stress wave. In order to clarify the propagation law and influencing factors of hydraulic blasting stress wave in the layered rock mass, the theoretical analysis combined with numerical simulation was used to study the influence law of the position and the medium of bedding on the propagation of hydraulic blasting stress wave. The results show that the initial pressure produced by hydraulic blasting is larger and the crushing effect is more obvious than those produced by conventional blasting. The stress wave of hydraulic blasting will reflect and transmit when it propagates to the bedding plane, which leads to the change of stress state of the rock in the area, and significant reduce of the peak value of incident stress near the area. The smaller the distance between the bedding plane and the explosion source, the more obvious the suppression effect on stress wave propagation and crack propagation. As the distance increases, the reflected stress waves promote the crack propagation between the bedding plane and the explosion source and induce the initial crack to continuously spread, and at the same time, the propagation direction of transverse crack is changed. The layered medium has a significant influence on the propagation of stress waves and the spread of cracks. The greater the performance difference between the bedding plane medium and the rock mass, the more serious the attenuation of the stress wave on the bedding plane, which reduces the effective action range of the stress wave.

关键词(KeyWords)： 水压爆破;数值模拟;层理面;应力波传播
hydraulic blasting;numerical simulation;bedding;propagation of stress wave

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51804058);; 重庆市教委科学技术研究资助项目(KJQN201800729);; 重庆交通大学研究生科研创新资助项目(2020S0004)

作者(Authors): 王海洋;陈祥;卢保东;赵树磊;王杰;周宴民;
WANG Hai-yang;CHEN Xiang;LU Bao-dong;ZHAO Shu-lei;WANG Jie;ZHOU Yan-min;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University;School of Civil Engineering, Chongqing Jiaotong University;China Railway 16st Bureau Group Road & Bridge Engineering Co., Ltd.;

DOI: 10.19931/j.EB.20200208

参考文献(References)：

• [1] 邓祥辉，陈建勋，罗彦斌，等.水平层状围岩隧道爆破控制技术[J].长安大学学报(自然科学版),2017,37(2):73-80,88.DENG X H,CHEN J X,LUO Y B,et al.Blasting control technology of horizontal stratified rock tunnel [J].Journal of Chang'an University(Natural science edition),2017,37(2):73-80,88.
• [2] LISJAK A,GRASSELLI G,VIETOR T.Continuum - discontinuum analysis of failure mechanisms around unsupported circular excavations in anisotropic clay Shales [J].International Journal of Rock Mechanics and Mining Sciences,2014,65:96-115.
• [3] 付宏伟.水压爆破应力波传播及破煤岩机制研究[D].重庆：重庆大学，2015.FU H W.Study on hydraulic blasting stress wave propagation and coal broken mechanism[D].Chongqing:Chongqing University,2015.
• [4] 张金，沈立晋.隧道全断面开挖光面爆破设计[J].工程爆破，2012,18(3):44-47.ZHANG J,SHEN L J.Smooth blasting besign in full section excavation of the tunnel[J].Engineering Blasting,2012,18(3):44-47.
• [5] HUANG B X,LI P F.Experimental investigation on the basic law of the fracture spatial morphology for water pressure blasting in a drillhole undertrue triaxial stress [J].Rock Mechanics and Rock Engineering,2015,48(4):1 699-1 709.
• [6] 张树川，朱飞昊，高魁.煤层深孔控制爆破作用机制研究[J].中国安全科学学报，2017,27(9):140-145.ZHANG S C,ZHU F H,GAO K.Study on mechanism of deep-hole controlled blasting in coal seam [J].China Safety Science Journal,2017,27(9):140-145.
• [7] 蔡永乐，付宏伟.水压爆破应力波传播及破煤岩机理实验研究 [J].煤炭学报，2017,42(4):902-907.CAI Y L,FU H W.Experimental study on hydraulic blasting stress wave propagation and coal broken mechanism [J].Journal of China Coal Society,2017,42(4):902-907.
• [8] ALIABADIAN Z,SHARAFISAFA M.Numerical modeling of presplitting controlled method in continuum rock masses[J].Arabian Journal of Geosciences,2013,7(12):5 005-5 020.
• [9] 聂武丁.隧道掘进水压爆破技术的实际应用[J].工程爆破，2012,18(4):38-41.NIE W D.Application of hydraulic blasting Technology in Tunnel driving[J].Engineering Blasting,2012,18(4):38-41.
• [10] 张凤鹏，彭建宇，范光华，等.不同静应力和节理条件下岩体爆破破岩机制研究[J].岩土力学，2016,37(7):1 839-1 846,1 913.ZHANG F P,PENG J Y,FAN G H,et al.Mechanisms of blasting-induced rock fractures under different static stress and joint properties conditions [J].Rock and Soil Mechanics,2016,37 (7):1 839-1 846,1 913.
• [11] LISJAK A,GARITTE B,GRASSELLI G,et al.The excavation of a circular tunnel in a bedded argillaceous rock (opalinus clay):Short term rock mass response and FDE Mnumerical analysis [J].Tunnelling and Under-ground Space Technology,2015,45:227-248.
• [12] 邵珠山，杨跃宗，米俊峰，等.水压爆破中波衰减规律及致裂机理的理论研究 [J].西安建筑科技大学学报(自然科学版),2017,49(6):820-826.SHAO Z S,YANG Y Z,MI J F,et al.Theoretical study on the wave attenuation law about water pressure blasting [J].Journal of Xi’an University of Architecture & Technology (Natural science edition),2017,49(6):820-826.
• [13] CAI Y L,FU H W.Experimental study on hydraulic blasting stress wave propagation and coal broken mechanism [J].Journal of China Coal Society,2017,42(4):902-907.
• [14] 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):3 552-3 560.LIU T T,LI X P,LI H B,et al.Numerical study on stress wave propagation across filled joints [J].Chinese Journal of Rock Mechanics and Engineering,2016,35(S2):3 552-3 560.
• [15] LI L C,TANG C A,LI G,et al.Numerical simulation of 3D hydraulic fracturing based on an improved flow stress damage model and a parallel FEM Technique [J].Rock Mechanics and Rock Engineering,2012,45(5) :801-818.
• [16] 丁尧，王俊，徐国文.层状岩体隧道围岩稳定性的数值模拟分析 [J].成都理工大学学报(自然科学版),2019,46(3):363-372.DING Y,WANG J,XU G W.Numerical simulation analysis on the tunnel stability in layered rock mass [J].Journal of Chengdu University of Technology (Science & technology edition),2019,46 (3):363-372.
• [17] 余永强，邱贤德，杨小林.层状岩体爆破损伤断裂机理分析 [J].煤炭学报，2004(4):409-412.YU Y Q,QIU X D,YANG X L.The mechanism analyses of bedded rock blasting damage and fracture [J].Journal of China Coal Society,2004(4):409-412.
• [18] 李裕春，时党勇，赵远.ANSYS11.0/LS-DYNA 基础理论与工程实践 [M].北京：中国水利水电出版社，2008.LI Y C,SHI D Y,ZHAO Y.Basic theory and engineering practice of ANSYS11.0/LS-DYNA [M].Beijing:China Water Conservancy and Hydropower Press,2008.
• [19] 蒲传金，杨鑫，肖定军，等.爆炸荷载作用下模型介质裂纹扩展试验与分析[J].实验力学，2017,32 (1):79-86.PU C J,YANG X,XIAO D J,et al.Test and analysis of crack propagation in model medium under explosive loading [J].Journal of Experimental Mechanics,2017,32 (1):79-86.