断续双裂隙砂岩的强度与起裂、贯通模式
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摘要
对含预制裂隙砂岩试样进行单轴循环加卸载试验,研究循环荷载作用下含预制裂隙砂岩的力学特性与岩桥贯通机理。试验结果表明:单轴循环加卸载作用下,砂岩试样峰值强度与弹性模量呈现出显著的强化现象;与完整砂岩试样对比,含预制裂隙红砂岩试件力学性能表现出明显的降低趋势,且与裂隙几何参数密切相关;试样峰值强度随着岩桥倾角增大呈现出先降低后增加的"V"形波动趋势,而随着裂隙倾角增大,试样峰值强度则表现出了与岩桥倾角相反的增减变化趋势;利用摄像机全程记录了试样裂纹的扩展,揭示了岩桥贯通机理与裂隙几何参数之间的关系。
In order to determine the mechanical properties and ligaments coalescence mechanism of precast fissure sandstone specimens,uniaxial tests under uniaxial cyclic loading were conducted by using the laboratory press. The experimental results show that the peak strength and elastic modulus of sandstone specimens show significant strengthening under uniaxial cyclic loading and unloading. Compared with intact sandstone specimens,the mechanical properties of precast fissure red sandstone specimens show a significant decrease trend. It is closely related to the geometric parameters of the fracture. The peak strength of the specimen shows a trend of V-shaped fluctuation with the increase of the inclination of the ligament (it goes down and then it goes up). However,with the increase of the crack inclination,the peak strength of the specimen shows a trend opposite to that of the ligament.The expansion of the crack of the specimens was recorded by the whole camera,revealing the relations between the ligament penetration mechanism and the geometric parameters of the fracture.
In order to determine the mechanical properties and ligaments coalescence mechanism of precast fissure sandstone specimens,uniaxial tests under uniaxial cyclic loading were conducted by using the laboratory press. The experimental results show that the peak strength and elastic modulus of sandstone specimens show significant strengthening under uniaxial cyclic loading and unloading. Compared with intact sandstone specimens,the mechanical properties of precast fissure red sandstone specimens show a significant decrease trend. It is closely related to the geometric parameters of the fracture. The peak strength of the specimen shows a trend of V-shaped fluctuation with the increase of the inclination of the ligament (it goes down and then it goes up). However,with the increase of the crack inclination,the peak strength of the specimen shows a trend opposite to that of the ligament.The expansion of the crack of the specimens was recorded by the whole camera,revealing the relations between the ligament penetration mechanism and the geometric parameters of the fracture.
引文
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5王述红,徐源,张轮,等.岩体隧洞损伤破坏过程实验及其颗粒流数值模拟[J].东北大学学报(自然科学版),2011,32(4):597-590Wang Shuhong,XüYuan,Zhang Lun,et al.Laboratory experiments on the process of rock tunnel failure and its particle flow numerical simulation[J].Journal of Northeastern University(Natural Science),2011,32(4):597-590
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7王述红,张通,祝梓航,等.应变速率对红砂岩预制隙裂贯通破坏的影响[J].解放军理工大学学报(自然科学版),2016,17(5):433-437Wang Shuhong,Zhang Tong,Zhu Zihang,et al.Effect of strain rates on failure of red sandstone containing two pre-existing fissures under[J].Journal of PLA University of Science and Technology(Natural Science Edition),2016,17(5):433-437
8张平,李宁,贺若兰,等.动载下两条断续预制裂隙贯通机制研究[J].岩石力学与工程学报,2006,25(6):1210-1217Zhang Ping,Li Ning,He Ruolan,et al.Mechanism of fracture coalescence between two pre-existing flaws under dynamic loading[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(6):1210-1217
9黎立云,许凤光,高峰,等.岩桥贯通机理的断裂力学分析[J].岩石力学与工程学报,2005,24(23):4328-4334Li Liyun,XüFengguang,Gao Feng,et al.Fracture mechanics analysis of rock bridge failure mechanism[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4328-4334
10林恒星,朱珍德,孙亚霖,等.透明类岩石预制裂隙不同赋存方式起裂扩展研究[J].固体力学学报,2015,36(专辑):58-64Lin Hengxing,Zhu Zhende,Sun Yalin,et al.Experimental studies on pre-existing crack in different ways propagation and coalescence in transparent rock[J].Chinese Journal of Solid Mechanics,2015,36(Album):58-64
11曹平,王华,靳瑾,等.渗透水压下孔洞裂隙砂岩断裂破坏试验研究[J].中国矿业大学学报,2018,47(2):240-246Cao Ping,Wang Hua,Jin Jin,et al.Experimental study of the fracture failure of sandstone containing hole and fissure under seepage water pressure[J].Journal of China University of Mining&Technology,2018,47(2):240-246
12郑雪梅,张通,祝梓航,等.双节理裂隙砂岩裂纹扩展特性试验分析[J].工程与试验,2016,56(3):39-42Zheng Xuemei,Zhang Tong,Zhu Zihang,et al.Analysis on fracture propagation characteristics of sandstone containing two pre-existing fissures[J].Engineering&Test,2016,56(3):39-42
13郭彦双,黄凯珠,朱维申,等.辉长岩中张开型表面裂隙破裂模式研究[J].岩石力学与工程学报,2007,26(3):525-531Guo Yanshuang,Huang Kaizhu,Zhu Weishen,et al.Study on fracture pattern of open surface-flaw in gabbro[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(3):525-531
14周建超,贾纯驰,吕建国.含预制裂纹的脆性岩石单轴压缩下渐进性破坏过程的试验研究[J].探矿工程(岩土钻掘工程),2012(9):66-70Zhou Jianchao,Jia Chunchi,LüJianguo.Experimental study on progressive failure process of brittle rock with pre-existing flaw based on uniaxial compression[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2012(9):66-70
15马林建,刘新宇,许宏发,等.循环荷载作用下盐岩三轴变形和强度特性试验研究[J].岩石力学与工程学报,2013,32(4):849-856Ma Linjian,Liu Xinyu,Xu Hongfa,et al.Deformation and strength properties of rock salt subjected to triaxial compression with cyclic loading[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(4):849-856
16夏冬,杨天鸿,王培涛,等.循环加卸载下饱和岩石变形破坏的损伤与能量分析[J].东北大学学报(自然科学版),2014,35(6):867-870Xia Dong,Yang Tianhong,Wang Peitao,et al.Analysis on damage and energy in deformation and fracture of saturated rock subjected to cyclic loading and unloading[J].Journal of Northeast University(Natural Science),2014,35(6):867-870
17李成杰,徐颖,娄培杰,等.等荷载循环加卸载下砂岩变形滞回环特性[J].科学技术与工程,2017,17(20):139-143Li Chengjie,Xu Ying,Lou Peijie,et al.Characteristics of hysteresis of sandstone deformation under constant and cyclic loading[J].Science Technology and Engineering,2017,17(20):139-143
18魏元龙,杨春和,郭印同,等.单轴循环荷载下含天然裂隙脆性页岩变形及破裂特征试验研究[J].岩土力学,2015,36(6):1649-1658Wei Yuanlong,Yang Chunhe,Guo Yintong,et al.Experimental investigation on deformation and fracture characteristics of brittle shale with natural cracks under uniaxial cyclic loading[J].Rock and Soil Mechanics,2015,36(6):1649-1658
19龙刚,周宗红,王海泉,等.循环加卸载下灰岩力学特性试验研究[J].煤矿机械,2016,37(9):29-31Long Gang,Zhou Zonghong,Wang Haiquan,et al.Experimental test mechanical characteristics of limestone under cyclic loading and unloading[J].Coal Mine Machinery,2016,37(9):29-31
20周家文,杨兴国,符文熹,等.脆性岩石单轴循环加卸载试验及断裂损伤力学特性研究[J].岩石力学与工程学报,2010,29(6):1172-1183Zhou Jiawen,Yang Xingguo,Fu Wenxi,et al.Experimental test and fracture damage mechanical characteristics of brittle rock under uniaxial cyclic loading and unloading conditions[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(6):1172-1183
21赵阳,周宏伟,钟江城.人工砂岩物理力学性质的实验研究[J].实验力学,2018,33(3):385-394Zhao Yang,Zhou Hongwei,Zhong Jiangcheng.Experimental study of physical and mechanical properties of artificial sandstone[J].Journal of Experimental Mechanics,2018,33(3):385-394
22王卫华,王小金,姜海涛,等.单轴压缩作用下含不同倾角裂隙的类岩石试样力学特性[J].科技导报,2014,32(28/29):48-53Wang Weihua,Wang Xiaojin,Jiang Haitao,et al.Experimental research on mechanical properties of rocklike specimens containing single cracks of different inclination angles under uniaxial compression[J].Science&Technology Review,2014,32(28/29):48-53
2黄彦华,杨圣奇.非共面双裂隙红砂岩宏细观力学行为颗粒流模拟[J].岩石力学与工程学报,2014,33(8):1644-1653Huang Yanhua,Yang Shengqi.Particle flow simulation of macro-and meso-mechanical behavior of red sandstone containing two pre-existing non-coplanar fissures[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(8):1644-1653
3凌丽,唐春安,王述红,等.钢管混凝土柱破坏过程的三维数值模拟[J].东北大学学报(自然科学版),2008,29(10):1505-1508Ling Li,Tang Chun'an,Wang Shuhong,et al.3D-Numerical simulation on failure process of concrete-filled steel tube column[J].Journal of Northeastern University(Natural Science),2008,29(10):1505-1508
4潘翔.共面断续裂隙岩石单轴压缩特征的颗粒流模拟[J].地下空间与工程学报,2017(4):37-43Pan Xiang.Numerical simulation of the failure characteristics of rocks containing coplanar nonpersistent fissures under uniaxial compression[J].Chinese Journal of Underground Space and Engineering,2017(4):37-43
5王述红,徐源,张轮,等.岩体隧洞损伤破坏过程实验及其颗粒流数值模拟[J].东北大学学报(自然科学版),2011,32(4):597-590Wang Shuhong,XüYuan,Zhang Lun,et al.Laboratory experiments on the process of rock tunnel failure and its particle flow numerical simulation[J].Journal of Northeastern University(Natural Science),2011,32(4):597-590
6郭牡丹,王述红,张航,等.层状岩体强度数值模拟及其讨论[J].东北大学学报(自然科学版),2010,31(10):1491-1494Guo Mudan,Wang Shuhong,Zhang Hang,et al.Numerical simulation and discussion on strength of layered rockmass[J].Journal of Northeastern University(Natural Science),2010,31(10):1491-1494
7王述红,张通,祝梓航,等.应变速率对红砂岩预制隙裂贯通破坏的影响[J].解放军理工大学学报(自然科学版),2016,17(5):433-437Wang Shuhong,Zhang Tong,Zhu Zihang,et al.Effect of strain rates on failure of red sandstone containing two pre-existing fissures under[J].Journal of PLA University of Science and Technology(Natural Science Edition),2016,17(5):433-437
8张平,李宁,贺若兰,等.动载下两条断续预制裂隙贯通机制研究[J].岩石力学与工程学报,2006,25(6):1210-1217Zhang Ping,Li Ning,He Ruolan,et al.Mechanism of fracture coalescence between two pre-existing flaws under dynamic loading[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(6):1210-1217
9黎立云,许凤光,高峰,等.岩桥贯通机理的断裂力学分析[J].岩石力学与工程学报,2005,24(23):4328-4334Li Liyun,XüFengguang,Gao Feng,et al.Fracture mechanics analysis of rock bridge failure mechanism[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4328-4334
10林恒星,朱珍德,孙亚霖,等.透明类岩石预制裂隙不同赋存方式起裂扩展研究[J].固体力学学报,2015,36(专辑):58-64Lin Hengxing,Zhu Zhende,Sun Yalin,et al.Experimental studies on pre-existing crack in different ways propagation and coalescence in transparent rock[J].Chinese Journal of Solid Mechanics,2015,36(Album):58-64
11曹平,王华,靳瑾,等.渗透水压下孔洞裂隙砂岩断裂破坏试验研究[J].中国矿业大学学报,2018,47(2):240-246Cao Ping,Wang Hua,Jin Jin,et al.Experimental study of the fracture failure of sandstone containing hole and fissure under seepage water pressure[J].Journal of China University of Mining&Technology,2018,47(2):240-246
12郑雪梅,张通,祝梓航,等.双节理裂隙砂岩裂纹扩展特性试验分析[J].工程与试验,2016,56(3):39-42Zheng Xuemei,Zhang Tong,Zhu Zihang,et al.Analysis on fracture propagation characteristics of sandstone containing two pre-existing fissures[J].Engineering&Test,2016,56(3):39-42
13郭彦双,黄凯珠,朱维申,等.辉长岩中张开型表面裂隙破裂模式研究[J].岩石力学与工程学报,2007,26(3):525-531Guo Yanshuang,Huang Kaizhu,Zhu Weishen,et al.Study on fracture pattern of open surface-flaw in gabbro[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(3):525-531
14周建超,贾纯驰,吕建国.含预制裂纹的脆性岩石单轴压缩下渐进性破坏过程的试验研究[J].探矿工程(岩土钻掘工程),2012(9):66-70Zhou Jianchao,Jia Chunchi,LüJianguo.Experimental study on progressive failure process of brittle rock with pre-existing flaw based on uniaxial compression[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2012(9):66-70
15马林建,刘新宇,许宏发,等.循环荷载作用下盐岩三轴变形和强度特性试验研究[J].岩石力学与工程学报,2013,32(4):849-856Ma Linjian,Liu Xinyu,Xu Hongfa,et al.Deformation and strength properties of rock salt subjected to triaxial compression with cyclic loading[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(4):849-856
16夏冬,杨天鸿,王培涛,等.循环加卸载下饱和岩石变形破坏的损伤与能量分析[J].东北大学学报(自然科学版),2014,35(6):867-870Xia Dong,Yang Tianhong,Wang Peitao,et al.Analysis on damage and energy in deformation and fracture of saturated rock subjected to cyclic loading and unloading[J].Journal of Northeast University(Natural Science),2014,35(6):867-870
17李成杰,徐颖,娄培杰,等.等荷载循环加卸载下砂岩变形滞回环特性[J].科学技术与工程,2017,17(20):139-143Li Chengjie,Xu Ying,Lou Peijie,et al.Characteristics of hysteresis of sandstone deformation under constant and cyclic loading[J].Science Technology and Engineering,2017,17(20):139-143
18魏元龙,杨春和,郭印同,等.单轴循环荷载下含天然裂隙脆性页岩变形及破裂特征试验研究[J].岩土力学,2015,36(6):1649-1658Wei Yuanlong,Yang Chunhe,Guo Yintong,et al.Experimental investigation on deformation and fracture characteristics of brittle shale with natural cracks under uniaxial cyclic loading[J].Rock and Soil Mechanics,2015,36(6):1649-1658
19龙刚,周宗红,王海泉,等.循环加卸载下灰岩力学特性试验研究[J].煤矿机械,2016,37(9):29-31Long Gang,Zhou Zonghong,Wang Haiquan,et al.Experimental test mechanical characteristics of limestone under cyclic loading and unloading[J].Coal Mine Machinery,2016,37(9):29-31
20周家文,杨兴国,符文熹,等.脆性岩石单轴循环加卸载试验及断裂损伤力学特性研究[J].岩石力学与工程学报,2010,29(6):1172-1183Zhou Jiawen,Yang Xingguo,Fu Wenxi,et al.Experimental test and fracture damage mechanical characteristics of brittle rock under uniaxial cyclic loading and unloading conditions[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(6):1172-1183
21赵阳,周宏伟,钟江城.人工砂岩物理力学性质的实验研究[J].实验力学,2018,33(3):385-394Zhao Yang,Zhou Hongwei,Zhong Jiangcheng.Experimental study of physical and mechanical properties of artificial sandstone[J].Journal of Experimental Mechanics,2018,33(3):385-394
22王卫华,王小金,姜海涛,等.单轴压缩作用下含不同倾角裂隙的类岩石试样力学特性[J].科技导报,2014,32(28/29):48-53Wang Weihua,Wang Xiaojin,Jiang Haitao,et al.Experimental research on mechanical properties of rocklike specimens containing single cracks of different inclination angles under uniaxial compression[J].Science&Technology Review,2014,32(28/29):48-53