脆-塑性充填裂隙差异的渗流应力模型
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摘要
为了研究不同属性介质(脆-塑性)非完全充填裂隙的渗流应力特性,采用花岗岩作为裂隙壁,利用自制渗流应力装置,通过轴向压缩、侧向约束的实验方式,进行了渗流应力实验,得出了相应的渗流应力曲线。结果表明:充填物的脆-塑性变化对裂隙渗流应力特性产生显著影响。脆性充填裂隙渗流应力曲线表现出平衡、失稳和稳定三个阶段;弹塑性充填裂隙表现为失稳和稳定两个阶段;塑性充填裂隙表现出急剧下降一个阶段。根据实验数据的整理与分析,得到差异充填(脆-塑性)裂隙的渗流规律;并建立了相应的数学模型。
In order to study the seepage stress characteristics of cracks with different brittle-plasticity properties,granite was used as the fracture wall,and the seepage stress was tested by the self-made seepage stress device through axial compression and lateral constraint. The corresponding seepage stress curves were obtained. The results show that the brittle to plastic change of the filled materials have significant influence on the seepage-stress characteristics of the fracture. The seepage-stress curves of brittle filled fracture show three stages: equilibrium,instability and stability. The seepage-stress curves of the elastoplastic filled fracture present two stages: instability and stability. The seepage-stress curves of the plastic-filled fracture show a sharp decline stage. Based on the analysis of experimental data,the seepage patterns of the fracture with different brittle-plastic filled were obtained,and the corresponding mathematical models were established.
In order to study the seepage stress characteristics of cracks with different brittle-plasticity properties,granite was used as the fracture wall,and the seepage stress was tested by the self-made seepage stress device through axial compression and lateral constraint. The corresponding seepage stress curves were obtained. The results show that the brittle to plastic change of the filled materials have significant influence on the seepage-stress characteristics of the fracture. The seepage-stress curves of brittle filled fracture show three stages: equilibrium,instability and stability. The seepage-stress curves of the elastoplastic filled fracture present two stages: instability and stability. The seepage-stress curves of the plastic-filled fracture show a sharp decline stage. Based on the analysis of experimental data,the seepage patterns of the fracture with different brittle-plastic filled were obtained,and the corresponding mathematical models were established.
引文
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13 王甘林,刘卫群,陶煜.充填泥沙裂隙岩石渗流特性的实验研究[J].力学与实践,2010,32(5):14-17Wang Ganlin,Liu Weiqun,Tao Yu. Experimental study of permeability in fractured sandstone with sediment particles[J]. Mechanics in Engineering,2010,32(5):14-17
14 陈宇龙.多场耦合作用下砂岩渗透率演化规律[J].中南大学学报(自然科学版),2017,48(9):2449-2457Chen Yulong. Evolution of sandstone permeability under multifield coupling[J]. Journal of Central South University(Natural Science Edition),2017,48(9):2449-2457
15 谢德斌.高等级水泥砂浆配合比设计的探讨[J].建筑监督检测与造价,2011,4(3):10-18Xie Debin. Discussion on the design of high grade cement mortar mix ratio[J]. Construction Supervision and Detection and Cost,2011,4(3):10-18
2 赵芳芳,梁冰,盖迪,等.基于分形理论的隧道砂土层渗透率快速测定研究[J].施工技术,2018,47(9):61-64Zhao Fangfang,Liang Bing,Ge Di,et al. Study on rapid determination of permeability of tunnel sand soil layer based on fractal theory[J]. Construction Technology,2018,47(9):61-64
3 Kavanagh J L,Pavier M J. Rock interface strength influences fluidfilled fracture propagation pathways in the crust[J]. Journal of Structural Geology,2014,63:68-75
4 张苑竹,金立乔,魏新江,等.水压下开裂混凝土中水分渗透红外试验[J].中国公路学报,2018,31(8):129-136Zhang Yuanzhu,Jin Liqiao,Wei Xinjiang,et al. Infrared test of moisture infiltration in cracked concrete under water pressure[J].Chinese Journal of Highway and Transport,2018,31(8):129-136
5 王伟,郑志,王如宾,等.不同应力路径下花岗片麻岩渗透特性的试验研究[J].岩石力学与工程学报,2016,35(2):260-267Wang Wei,Zheng Zhi,Wang Rubin,et al. Experimental study on the permeability of granite gneiss under different stress paths[J].Journal of Rock Mechanics and Engineering,2016,35(2):260-267
6 姜婷婷,张建华,黄刚.不同层理方向的煤岩渗透特性研究[J].科学技术与工程,2017,17(17):206-211Jiang Tingting,Zhang Jianhua,Huang Gang. Study on coal and rock permeability characteristics in different bedding directions[J]. Science Technology and Engineering,2017,17(17):206-211
7 吴迪,孙光华,黄刚.胶结尾砂充填体渗流特性的试验与模拟[J].中南大学学报(自然科学版),2015,46(3):1050-1057Wu Di,Sun Guanghua,Huang Gang. Experimental and simulation study on seepage characteristics of cemented tailings backfill[J].Journal of Central South University(Science and Technology),2015,46(3):1050-1057
8 Jiao Y Y,Zhang H Q,Zhang X L,et al. A two-dimensional coupled hydromechanical discontinuum model for simulating rock hydraulic fracturing[J]. International Journal for Numerical and Analytical Methods in Geomechanics,2015,39(5):457-481
9 赵延林,彭青阳,万文,等.高水压下岩体裂纹扩展的渗流-断裂耦合机制与数值实现[J].岩土力学,2014,35(2):556-564Zhao Yanlin,Peng Qingyang,Wan Wen,et al. Seepage-fracture coupling mechanism of rock masses cracking propagationunder high hydraulic pressure and numerical verification[J]. Rock and Soil Mechanics,2014,35(2):556-564
10 陈金刚,张泷,樊军委.脆塑性充填裂隙渗流应力特性[J].采矿与安全工程学报,2016,33(6):1103-1107Chen Jingang,Zhang Long,Fan Junwei. Seepage stress characteristics of brittle and plastic filling cracks[J]. Journal of Mining and Safety Engineering,2016,33(6):1103-1107
11 陈金刚,张景飞.充填物的力学响应对裂隙渗流的影响[J].岩土力学,2006,27(4):577-580Chen Jingang,Zhang Jingfei. Influence of mechanical responses of fillings on fracture seepage[J]. Rock and Soil Mechanics,2006,27(4):577-580
12 陈金刚,张树勋,张景飞.非全充填裂隙的动态变形模量实验研究[J].郑州大学学报(工学版),2014,35(3):90-93Chen Jingang,Zhang Shuxun,Zhang Jingfei. Experimental study on dynamic deformation modulus of incomplete filling fractures[J].Journal of Zhengzhou University(Engineering Science Edition),2014,35(3):90-93
13 王甘林,刘卫群,陶煜.充填泥沙裂隙岩石渗流特性的实验研究[J].力学与实践,2010,32(5):14-17Wang Ganlin,Liu Weiqun,Tao Yu. Experimental study of permeability in fractured sandstone with sediment particles[J]. Mechanics in Engineering,2010,32(5):14-17
14 陈宇龙.多场耦合作用下砂岩渗透率演化规律[J].中南大学学报(自然科学版),2017,48(9):2449-2457Chen Yulong. Evolution of sandstone permeability under multifield coupling[J]. Journal of Central South University(Natural Science Edition),2017,48(9):2449-2457
15 谢德斌.高等级水泥砂浆配合比设计的探讨[J].建筑监督检测与造价,2011,4(3):10-18Xie Debin. Discussion on the design of high grade cement mortar mix ratio[J]. Construction Supervision and Detection and Cost,2011,4(3):10-18