黄金科学技术 ›› 2020, Vol. 28 ›› Issue (4): 509-520.doi: 10.11872/j.issn.1005-2518.2020.04.029
Guicheng HE1(),Kexu CHEN1,2,Bing DAI1,2(
),Chengcheng WANG1
摘要:
岩石内部微裂隙的起裂贯通破坏易引发边坡滑坡、隧道塌方和采场冒顶等工程事故,造成巨大的经济损失和恶劣的社会影响。为了探究裂隙岩石中裂隙演化规律及破坏机理,根据相似理论,采用细沙、白水泥和水按一定比例制作含十字交叉裂隙的类岩石试样,利用RMT-150B岩石力学试验机对其进行单轴压缩试验,并基于室内试验测试结果,建立了含预制十字交叉裂隙岩石试样的PFC数值模拟模型,分析含十字交叉裂隙试样的裂纹起裂、扩展和贯通的演化规律及其失稳破坏机理。研究结果表明:含十字交叉裂隙试样的峰值强度和弹性模量低于完整试样;数值模拟结果的峰值强度、弹性模量、起裂应力和裂隙倾角的变化关系与室内试验测试结果的变化关系基本吻合,即随着裂隙倾角的增大呈现先增大后减小的倒“V”形变化趋势;裂隙倾角为0°时微裂纹起裂于主次裂隙尖端,裂隙倾角为30°时裂纹起裂于主裂隙尖端,裂隙倾角为45°和60°时裂纹起裂于次裂隙尖端;微裂纹数量随应变增加经历了静止期、增加缓慢期、中期增加期和最活跃期4个阶段,且后一阶段增长率总是高于前一阶段;裂隙倾角为0°、30°、45°和60°时试样的破坏模式均为对角剪切破坏。
中图分类号:
1 | 钱七虎.地下工程建设安全面临的挑战与对策[J].岩石力学与工程报,2012,31(10):1945-1956. |
Qian Qihu.Challenges faced by underground projects construction safety and countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(10):1945-1956. | |
2 | Brace W F,Byerlee J D.Recent experimental studies of brittle fracture rocks[C]//Proeeedings of the Eighth U. S. Symposium on Rock Mechanics.Minnesota:American Rock Mechanics Assonciation,1967:57-81. |
3 | Wong L N Y,Einstein H H.Systematic evaluation of cracking behavior in specimens containing single flaws under uniaxial compression[J].International Journal of Rock Mechanics and Mining Sciences,2009,46(2):239-249. |
4 | 蒲成志,曹平,陈瑜,等.不同裂隙相对张开度下类岩石材料断裂试验与破坏机理[J].中南大学学报(自然科学版),2011,42(8):2394-2399. |
Pu Chengzhi,Cao Ping,Chen Yu,et al.Fracture test and failure mechanism of rock-like material of relatively different fracture apertures[J].Journal of Central South University(Science and Technology),2011,42(8):2394-2399. | |
5 | 张国凯,李海波,王明洋,等.基于声学测试和摄像技术的单裂隙岩石裂纹扩展特征研究[J].岩土力学,2019,40(增1):63-72,81. |
Zhang Guokai,Li Haibo,Wang Mingyang,et al.Crack propagation characteristics in rocks containing single fissure based on acoustic testing and camera technique[J].Rock and Soil Mechanics,2019,40(Supp.1):63-72,81. | |
6 | Haeri H,Shahriar K,Marji M F,et al.Experimental and numerical study of crack propagation and coalescence in pre-cracked rock-like disks[J].International Journal of Rock Mechanics and Mining Sciences,2014,67(4):20-28. |
7 | 黄彦华,杨圣奇.断续三裂隙砂岩单轴压缩裂纹扩展特征颗粒流分析[J].应用基础与工程科学学报,2016,24(6):1232-1246. |
Huang Yanhua,Yang Shengqi.Particle flow analysis on crack coalescence behavior of sandstone specimen containing three pre-existing fissures under uniaxial compression[J].Journal of Basic Science and Engineering,2016,24(6):1232-1247. | |
8 | Lee J,Hong J W,Jung J W.The mechanism of fracture coalescence in pre-cracked rock-type material with three flaws[J].Engineering Geology,2017,223:31-47. |
9 | Yang S Q.Crack coalescence behavior of brittle sandstone samples containing two coplanar fissures in the process of deformation failure[J].Engineering Fracture Mechanics,2011,78(17):3059-3081. |
10 | Zhou X P,Cheng H,Feng Y F.An experimental study of crack coalescence behaviour in rock-like materials containing multiple flaws under uniaxial compression[J].Rock Mechanics and Rock Engineering,2014,47:1961-1986. |
11 | 黄彦华,杨圣奇,鞠杨,等.断续裂隙类岩石材料三轴压缩力学特性试验研究[J].岩土工程学报,2016,38(7):1212-1220. |
Huang Yanhua,Yang Shengqi,Ju Yang,et al.Experimental study on mechanical behavior of rock-like materials containing pre-existing intermittent fissures under triaxial compression[J].Chinese Journal of Geotechnical Mecha-nics and Engineering,2016,38(7):1212-1220. | |
12 | 杨圣奇,黄彦华,温森.高温后非共面双裂隙红砂岩力学特性试验研究[J].岩石力学与工程学报,2015,34(3):440-451. |
Yang Shengqi,Huang Yanhua,Wen Sen.Experimental study of mechanical behavior of red sandstone with two non-coplanar fissures after high temperature heating[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(3):440-451. | |
13 | 范祥,谢永利,来弘鹏,等.含两条节理岩样压缩破坏行为的颗粒流模拟[J].地下空间与工程学报,2018,14(2):461-469. |
Fan Xiang,Xie Yongli,Lai Hongpeng,et al.Numerical simulation of failure behavior of specimens with two flaws under compressive loading using PFC[J].Chinese Journal of Underground Space and Engineering,2018,14(2):461-469. | |
14 | Huang Y H,Yang S Q,Ranjith P G,et al.Strength failure behavior and crack evolution mechanism of granite containing pre-existing non-coplanar holes:Experimental stu-dy and particle flow modeling[J].Computers and Geotechnics,2017,88:182-198. |
15 | Sun W B,Du H Q,Shao J L,et al.Numerical Analysis of Crack Propagation Evolution of Specimens with Different Dip Angles of Cross Fractures[J].Geotechnical and Geological Engineering,2019,37:3379-3386. |
16 | 田文岭,杨圣奇,黄彦华.不同围压下共面双裂隙脆性砂岩裂纹演化特性颗粒流模拟研究[J].采矿与安全工程学报,2017,34(6):1207-1215. |
Tian Wenling,Yang Shengqi,Huang Yanhua.PFC2D simulation on crack evolution behavior of brittle sandstone containing two coplanar fissures under different confining pressures[J].Journal of Mining and Safety Engineering,2017,34(6):1207-1215. | |
17 | 李勇,蔡卫兵,朱维申,等.单轴压缩条件下平行双裂隙演化机理的颗粒流分析[J].中南大学学报(自然科学版),2019,50(12):3035-3045. |
Li Yong,Cai Weibing,Zhu Weishen,et al.Particle flow analysis of parallel double crack evolution under uniaxial compression[J].Journal of Central South University(Sc-ience and Technology),2019,50(12):3035-3045. | |
18 | Cao Ping,Liu Taoying,Pu Chengzhi,et al.Crack propagation and coalescence of brittle rock-like specimens with pre-existing cracks in compression[J].Engineering Geology,2015,187:113-121. |
19 | 张波,李术才,杨学英,等.含交叉多裂隙类岩石材料单轴压缩力学性能研究[J].岩石力学与工程学报,2015,34(9):1777-1785. |
Zhang Bo,Li Shucai,Yang Xueying,et al.Mechanical property of rock-like material with intersecting multi-flaws under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(9):1777-1785. | |
20 | 张波,李术才,杨学英,等.含交叉裂隙节理岩体单轴压缩破坏机制研究[J].岩土力学,2014,35(7):1863-1870. |
Zhang Bo,Li Shucai,Yang Xueying,et al.Uniaxial compression failure mechanism of jointed rock mass with cross-cracks[J].Rock and Soil Mechanics,2014,35(7):1863-1870. | |
21 | 张波,杨学英,李术才,等.含两组叠置X型裂隙类岩石材料单轴拉伸破坏特征[J].煤炭学报,2017,42(8):1987-1993. |
Zhang Bo,Yang Xueying,Li Shucai,et al.Uniaxial tensile failure properties of rock-like specimens with two overlapped X-type flaws[J].Journal of China Coal Society,2017,42(8):1987-1993. | |
22 | 罗可,招国栋,曾佳君,等.加载速率影响的含裂隙类岩石材料破断试验与数值模拟[J].岩石力学与工程学报,2018,37(8):1833-1842. |
Luo Ke,Zhao Guodong,Zeng Jiajun,et al.Fracture experiments and numerical simulation of cracked body in rock-like materials affected by loading rate[J].Chinese Journal of Rock Mechanics and Engineering,2018,37(8):1833-1842. | |
23 | 蒲成志,曹平,衣永亮.单轴压缩下预制2条贯通裂隙类岩材料断裂行为[J].中南大学学报(自然科学版),2012,43(7):2708-2715. |
Pu Chengzhi,Cao Ping,Yi Yongliang.Fracture for rock-like materials with two transfixion fissures under uniaxial compression[J].Journal of Central South University(Science and Technology),2012,43(7):2708 -2715. | |
24 | 王宇,李晓,武艳芳,等.脆性岩石起裂应力水平与脆性指标关系探讨[J].岩石力学与工程学报,2014,33 (2):264-275. |
Wang Yu,Li Xiao,Wu Yanfang,et al.Research on relationship between crack initiation stress level and brittleness indices for brittle rocks[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):264-275. | |
25 | Zhang X P,Wong L N Y.Displacement field analysis for cracking processes in bonded-particle model[J].Bulletin of Engineering Geology and the Environment,2014,73(1):13-21. |
[1] | 苏怀斌,张钦礼,张德明,曾长根,朱晓江. 穰家垅银矿大规模充填采矿采场结构参数优化研究[J]. 黄金科学技术, 2020, 28(4): 550-557. |
[2] | 寇永渊, 李光, 邹龙, 马凤山, 郭捷. 金川二矿区+1 000 m中段水平矿柱回采方法研究[J]. 黄金科学技术, 2020, 28(3): 353-362. |
[3] | 王程程, 罗鑫尧, 陈科旭, 戴兵, 贺桂成. 含预制裂隙类岩石裂隙演化与破裂特征的试验研究[J]. 黄金科学技术, 2020, 28(3): 421-429. |
[4] | 聂兴信, 甘泉, 高建, 冯珊珊. 协同理念下岩金矿脉群连续回采顶板安全跨度研究[J]. 黄金科学技术, 2020, 28(3): 337-344. |
[5] | 于世波, 杨小聪, 原野, 王志修. 深部区域采矿时序的地压调控卸荷效应研究[J]. 黄金科学技术, 2020, 28(3): 345-352. |
[6] | 黄锐,吴娥,吴林. 海拔高度对矿井巷道火灾烟气蔓延规律的影响研究[J]. 黄金科学技术, 2020, 28(2): 293-300. |
[7] | 田龙,周智勇,陈建宏. 配备辅助通风的高温矿井采掘区温度分布数值模拟[J]. 黄金科学技术, 2020, 28(1): 61-69. |
[8] | 张钦礼,蒋超余,高翔,刘斌. 大断面六角形进路采矿法结构参数优化研究[J]. 黄金科学技术, 2020, 28(1): 42-50. |
[9] | 高远,陈庆发,蒋腾龙. 大新锰矿复杂空区群三维数值模型构建方法及胶结充填治理研究[J]. 黄金科学技术, 2019, 27(6): 851-861. |
[10] | 谢也真,曹平,陈昊然. 滥泥坪铜矿三维地应力测量及巷道布置优化研究[J]. 黄金科学技术, 2019, 27(6): 862-870. |
[11] | 宋恩祥, 李强, 张静, 彭康. 蚀变带内矿体开采中人工假底的应用研究[J]. 黄金科学技术, 2019, 27(5): 722-730. |
[12] | 田军, 刘建坡, 杨勇, 张长银. 进路充填法爆破扰动诱发充填体破坏规律研究[J]. 黄金科学技术, 2019, 27(5): 687-695. |
[13] | 孙冰,罗瑜,谢杰辉,曾晟. N型组合节理类岩体单轴压缩破坏试验[J]. 黄金科学技术, 2019, 27(4): 548-556. |
[14] | 杨仕教,王志会. 上覆公路浅埋采空区群稳定性数值模拟[J]. 黄金科学技术, 2019, 27(4): 505-512. |
[15] | 刘锋,王昭坤,马凤山,王波,王剑波,董春蕾. 矿山深部卸压技术研究现状及展望[J]. 黄金科学技术, 2019, 27(3): 425-432. |
|