爆炸载荷下邻近巷道围岩裂纹贯穿过程研究
|
摘要
围岩中原有裂纹扩展贯穿是爆炸载荷下巷道围岩破坏的主要表现形式,为了更清楚地了解围岩中原有裂纹的扩展贯穿机理,采用动态焦散线实验系统进行了详细研究。研究结果表明:爆生气体准静态应力与削弱的应力场叠加产生主应力差峰值,以弧形波的形式作用于邻近巷道围岩主裂纹,并驱动主裂纹的快速扩展及与原有裂纹的贯穿。主裂纹与原有裂纹贯穿伴随着能量的叠加和传递,表现为贯穿后原有裂纹的起裂、扩展,且扩展速度增加,而能量的叠加和传递,使得原有裂纹起裂扩展所需的能量释放率减小。主裂纹与原有裂纹的贯穿微观上表现为应力场作用下主裂纹与原有裂纹间形成带状拉应力集中区,带状应力集中区域微裂纹被激活、连通,形成损伤演化带,爆生主裂纹最终沿损伤演化带与原有裂纹贯穿。
The original crack propagation in surrounding rock is the main manifestation of the surrounding rock failure under the explosion load.In order to explore the extension mechanism of the original crack,the dynamic caustic line test system was adopted.Results show that the superposition of quasi-static stress from explosive gas and weakened stress field generates the peak value of the principal stress difference,which induces the main crack of the surrounding rock with arc wave.The main crack was driven to expand rapidly and penetrated with the original crack.The main crack and the original crack were accompanied by the superposition and transmission of energy,which was characterized by the cracking and expansion of the original crack after the penetration,accompanied with increased expansion speed.The superposition and transmission of energy inducing the original crack cracking and expansion got reduced.The penetration of the main crack and the original crack were characterized by a band-shaped tensile stress concentration zone between the main crack and the original crack.The micro-cracks in the band stress concentration region were activated and connected to form a damage evolution zone.The main crack finally passed through the damage evolution zone and the original initiates.
The original crack propagation in surrounding rock is the main manifestation of the surrounding rock failure under the explosion load.In order to explore the extension mechanism of the original crack,the dynamic caustic line test system was adopted.Results show that the superposition of quasi-static stress from explosive gas and weakened stress field generates the peak value of the principal stress difference,which induces the main crack of the surrounding rock with arc wave.The main crack was driven to expand rapidly and penetrated with the original crack.The main crack and the original crack were accompanied by the superposition and transmission of energy,which was characterized by the cracking and expansion of the original crack after the penetration,accompanied with increased expansion speed.The superposition and transmission of energy inducing the original crack cracking and expansion got reduced.The penetration of the main crack and the original crack were characterized by a band-shaped tensile stress concentration zone between the main crack and the original crack.The micro-cracks in the band stress concentration region were activated and connected to form a damage evolution zone.The main crack finally passed through the damage evolution zone and the original initiates.
引文
[1] 孔德森,孟庆辉,张伟伟,等.爆炸荷载作用下地铁隧道的冲击反应研究[J].振动与冲击,2012,31(12):68-72.[1] KONG De-sen,MENG Qing-hui,ZHANG Wei-wei,et al.Shock responses of a metro tunnel subjected to explosive loads[J].Journal of Vibration and Shock,2012,31(12):68-72.(in Chinese)
[2] 袁红所,张家铭,董宇,等.小净距邻近营业线隧道爆破施工研究[J].爆破,2017,34(1):57- 60.[2] YUAN Hong-suo,ZHANG Jia-ming,DONG Yu,et al.Research of tunnel blasting construction adjacent to business line[J].Blasting,2017,34(1):57- 60.(in Chinese)
[3] 施高萍,祝江鸿,李保海,等.矩形巷道孔边应力的弹性分析[J].岩土力学,2014,35(9):2587-2061.[3] SHI Gao-ping,ZHU Jiang-hong,LI Bao-hai,et al.Elastic analysis of hole-edge stress of rectangular roadway[J].Rock and Soil Mechanics,2014,35(9):2587-2061.(in Chinese)
[4] 梁建文,张浩,VINCENT W Lee.平面P波入射地下洞室群动应力集中问题解析解[J].岩土工程学报,2004,26(6):815-819.[4] LIANG Jian-wen,ZHANG Hao,VINCENT W Lee.An analytical solution for dynamic stress concentration of underground cavities under incident plane P waves[J].Chinese Journal of Geotechnical Engineering,2004,26(6):815-819.(in Chinese)
[5] 李兴华,龙源,纪冲,等.爆破地震波作用下隧道围岩动应力集中系数分析[J].岩土工程学报,2013,35(3):378-382.[5] LI Xin-hua,LONG Yuan,JI Chong,et al.Dynamic stress concentration factor for tunnel surrounding rock under blasting seismic waves[J].Chinese Journal of Geotechnical Engineering,2013,35(3):378-382.(in Chinese)
[6] 刘慧.近距侧爆情况下马蹄形隧道动态响应特点的研究[J].爆炸与冲击,2000,20 (2):175-181.[6] LIU Hui.The research of dynamic response characteristics for horseshoe tunnel in the case of close side blasting[J].Explosion and Shock Waves,2000,20(2):175-181.(in Chinese)
[7] 谭忠盛,杨小林,王梦恕.复线隧道施工爆破对既有隧道的影响分析[J].岩石力学与工程学报,2003,22(2):281-285.[7] TAN Zhong-sheng,YANG Xiao-lin,WANG Meng-shu.Effect of blast in double line tunnel on existing tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(2):281-285.(in Chinese)
[8] 钟冬望,吴亮,余刚.邻近隧道掘进爆破对既有隧道的影响[J].爆炸与冲击,2010,30(5):456- 462.[8] ZHONG Dong-wang,WU Liang,YU Gang.Effect of tunneling blasting on the existing adjacent tunnel[J].Explosion and Shock Waves,2010,30(5):456- 462.(in Chinese)
[9] 李宁,顾强康,张承客.相邻洞室爆破施工对已有洞室的影响[J].岩石力学与工程学报,2009,28(1):31-38.[9] LI Ning,GU Qing-kang,ZHANG Cheng-ke.Influence of blasting on excavation of a new tunnel adjacent to existing tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(1):30-38.(in Chinese)
[10] 郭东明,刘康,胡久羡,等.爆生气体对邻近硐室背爆侧预制裂纹影响机理[J].煤炭学报,2016,41(1):265-270.[10] GUO Dong-ming,LIU Kang,HU Jiu-xian,et al.Experimental study on the effect mechanism of the explosion gas on the pre-crack in the back-blasting of adjacent tunnel[J].Journal of China Coal Society,2016,41(1):265-270.(in Chinese)
[11] 郭东明,刘康,杨仁树,等.动静荷载对邻近巷道裂纹缺陷扰动的模拟实验[J].爆炸与冲击,2016,36(3):297-304.[11] GUO Dong-ming,LIU Kang,YANG Ren-shu,et al.Simulated experiment of disturbance effect on crack defects of adjacent tunnel under dynamic and static load[J].Explodion and Shock Waves,2016,36(3):297-304.(in Chinese)
[12] 杨仁树,王雁冰,杨立云,等.双孔切槽爆破裂纹扩展的动焦散试验[J].中国矿业大学学报,2012,41(6):868-872.[12] YANG Ren-shu,WANG Yan-bing,YANG Li-yun,et al.Dynamic caustics experimental study on crack propagation in two borehole cut blasting[J].Journal of China University of Mining and Technology,2012,41(6):868-872.(in Chinese)
[13] 杨立云,杨仁树,许鹏.新型数字激光动态焦散线实验系统及其应用[J].中国矿业大学学报,2013,42(2):188-194.[13] YANG Li-yun,YANG Ren-shu,XU Peng.Caustics method combined with laser and digital high-speed camera and its applications[J].Journal of China University of Mining and Technology,2013,42(2):188-194.(in Chinese)
[14] 郭东明,刘康,杨仁树,等.爆炸冲击载荷下相邻巷道裂隙扩展机理模拟试验[J].振动与冲击,2016,32(2):178-183.[14] GUO Dong-ming,LIU Kang,YANG Ren-shu,et al.Simulation experiments on the mechanism of adjacent tunnel crack extension induced by explosion load[J].Journal of Vibration and Shock,2016,35(2):178-183.(in Chinese)
[15] 杨仁树,丁晨曦,杨立云,等.动态爆生裂纹相互影响的试验研究[J].爆破,2016,33(2):1-5,73.[15] YANG Ren-shu,DING Chen-xi,YANG Li-yun,et al.Experimental study on interaction effect of dynamic cracks induced by blast[J].Blasting,2016,33(2):1-5,73.(in Chinese)
[16] 岳中文,杨仁树,郭东明,等.爆炸应力波作用下缺陷介质裂纹扩展的动态分析[J].岩土力学,2009,30(4):949-954.[16] YUE Zhong-wen,YANG Ren-shu,GUO Dong-ming,et al.Dynamic analysis of crack propagation in material containing flaws under the explosive stress wave[J].Rock and Soil Mechanics,2009,30(4):949-954.(in Chinese)
[17] PAPADOPOULOS G A.Dynamic caustics and its applications[J].Optics and Lasers in Engineering,1990,13(3):211-249.
[18] FREUND L B.Dynamic fracture mechanics[M].Edinburgh:Cambridge University Press,1990.
[19] 刘康.爆炸载荷下邻近巷道围岩裂纹演化机理研究[D].北京:中国矿业大学(北京),2018.[19] LIU Kang.The research on the growth mechanics of crack in the surrounding rock of adjacent tunnel under the blasting load[D].Beijing:China University of Mining & Technology,2018.(in Chinese)
[2] 袁红所,张家铭,董宇,等.小净距邻近营业线隧道爆破施工研究[J].爆破,2017,34(1):57- 60.[2] YUAN Hong-suo,ZHANG Jia-ming,DONG Yu,et al.Research of tunnel blasting construction adjacent to business line[J].Blasting,2017,34(1):57- 60.(in Chinese)
[3] 施高萍,祝江鸿,李保海,等.矩形巷道孔边应力的弹性分析[J].岩土力学,2014,35(9):2587-2061.[3] SHI Gao-ping,ZHU Jiang-hong,LI Bao-hai,et al.Elastic analysis of hole-edge stress of rectangular roadway[J].Rock and Soil Mechanics,2014,35(9):2587-2061.(in Chinese)
[4] 梁建文,张浩,VINCENT W Lee.平面P波入射地下洞室群动应力集中问题解析解[J].岩土工程学报,2004,26(6):815-819.[4] LIANG Jian-wen,ZHANG Hao,VINCENT W Lee.An analytical solution for dynamic stress concentration of underground cavities under incident plane P waves[J].Chinese Journal of Geotechnical Engineering,2004,26(6):815-819.(in Chinese)
[5] 李兴华,龙源,纪冲,等.爆破地震波作用下隧道围岩动应力集中系数分析[J].岩土工程学报,2013,35(3):378-382.[5] LI Xin-hua,LONG Yuan,JI Chong,et al.Dynamic stress concentration factor for tunnel surrounding rock under blasting seismic waves[J].Chinese Journal of Geotechnical Engineering,2013,35(3):378-382.(in Chinese)
[6] 刘慧.近距侧爆情况下马蹄形隧道动态响应特点的研究[J].爆炸与冲击,2000,20 (2):175-181.[6] LIU Hui.The research of dynamic response characteristics for horseshoe tunnel in the case of close side blasting[J].Explosion and Shock Waves,2000,20(2):175-181.(in Chinese)
[7] 谭忠盛,杨小林,王梦恕.复线隧道施工爆破对既有隧道的影响分析[J].岩石力学与工程学报,2003,22(2):281-285.[7] TAN Zhong-sheng,YANG Xiao-lin,WANG Meng-shu.Effect of blast in double line tunnel on existing tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(2):281-285.(in Chinese)
[8] 钟冬望,吴亮,余刚.邻近隧道掘进爆破对既有隧道的影响[J].爆炸与冲击,2010,30(5):456- 462.[8] ZHONG Dong-wang,WU Liang,YU Gang.Effect of tunneling blasting on the existing adjacent tunnel[J].Explosion and Shock Waves,2010,30(5):456- 462.(in Chinese)
[9] 李宁,顾强康,张承客.相邻洞室爆破施工对已有洞室的影响[J].岩石力学与工程学报,2009,28(1):31-38.[9] LI Ning,GU Qing-kang,ZHANG Cheng-ke.Influence of blasting on excavation of a new tunnel adjacent to existing tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(1):30-38.(in Chinese)
[10] 郭东明,刘康,胡久羡,等.爆生气体对邻近硐室背爆侧预制裂纹影响机理[J].煤炭学报,2016,41(1):265-270.[10] GUO Dong-ming,LIU Kang,HU Jiu-xian,et al.Experimental study on the effect mechanism of the explosion gas on the pre-crack in the back-blasting of adjacent tunnel[J].Journal of China Coal Society,2016,41(1):265-270.(in Chinese)
[11] 郭东明,刘康,杨仁树,等.动静荷载对邻近巷道裂纹缺陷扰动的模拟实验[J].爆炸与冲击,2016,36(3):297-304.[11] GUO Dong-ming,LIU Kang,YANG Ren-shu,et al.Simulated experiment of disturbance effect on crack defects of adjacent tunnel under dynamic and static load[J].Explodion and Shock Waves,2016,36(3):297-304.(in Chinese)
[12] 杨仁树,王雁冰,杨立云,等.双孔切槽爆破裂纹扩展的动焦散试验[J].中国矿业大学学报,2012,41(6):868-872.[12] YANG Ren-shu,WANG Yan-bing,YANG Li-yun,et al.Dynamic caustics experimental study on crack propagation in two borehole cut blasting[J].Journal of China University of Mining and Technology,2012,41(6):868-872.(in Chinese)
[13] 杨立云,杨仁树,许鹏.新型数字激光动态焦散线实验系统及其应用[J].中国矿业大学学报,2013,42(2):188-194.[13] YANG Li-yun,YANG Ren-shu,XU Peng.Caustics method combined with laser and digital high-speed camera and its applications[J].Journal of China University of Mining and Technology,2013,42(2):188-194.(in Chinese)
[14] 郭东明,刘康,杨仁树,等.爆炸冲击载荷下相邻巷道裂隙扩展机理模拟试验[J].振动与冲击,2016,32(2):178-183.[14] GUO Dong-ming,LIU Kang,YANG Ren-shu,et al.Simulation experiments on the mechanism of adjacent tunnel crack extension induced by explosion load[J].Journal of Vibration and Shock,2016,35(2):178-183.(in Chinese)
[15] 杨仁树,丁晨曦,杨立云,等.动态爆生裂纹相互影响的试验研究[J].爆破,2016,33(2):1-5,73.[15] YANG Ren-shu,DING Chen-xi,YANG Li-yun,et al.Experimental study on interaction effect of dynamic cracks induced by blast[J].Blasting,2016,33(2):1-5,73.(in Chinese)
[16] 岳中文,杨仁树,郭东明,等.爆炸应力波作用下缺陷介质裂纹扩展的动态分析[J].岩土力学,2009,30(4):949-954.[16] YUE Zhong-wen,YANG Ren-shu,GUO Dong-ming,et al.Dynamic analysis of crack propagation in material containing flaws under the explosive stress wave[J].Rock and Soil Mechanics,2009,30(4):949-954.(in Chinese)
[17] PAPADOPOULOS G A.Dynamic caustics and its applications[J].Optics and Lasers in Engineering,1990,13(3):211-249.
[18] FREUND L B.Dynamic fracture mechanics[M].Edinburgh:Cambridge University Press,1990.
[19] 刘康.爆炸载荷下邻近巷道围岩裂纹演化机理研究[D].北京:中国矿业大学(北京),2018.[19] LIU Kang.The research on the growth mechanics of crack in the surrounding rock of adjacent tunnel under the blasting load[D].Beijing:China University of Mining & Technology,2018.(in Chinese)