单轴压缩下不同强度组合复合岩体相似材料试件力学特性研究
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摘要
为了研究接触带复合岩体变形破坏特征,以水泥、砂和石膏为相似材料,制作由两种不同强度材料构成的复合试件,通过单轴压缩试验,分析相似材料强度比及较高强度材料体积占比对复合试件力学特性的影响。研究结果表明,(1)相似材料强度比越大对复合试件整体强度的影响越大,较高强度材料体积占比的变化对复合试件整体强度的影响较为显著;(2)相似材料强度比为1.74时破裂面从复合试件一端穿过相似材料接触面,相似材料强度比值为2.49时破裂面由接触面向复合试件两端延伸,相似材料强度比为4.33时复合试件逐渐由两端破坏转为较低强度材料端破坏;(3)声发射计数的变化与复合试件破坏位置与形态呈对应关系,随着相似材料强度比的增加,较高强度材料端声发射计数逐渐减小,较低强度材料端声发射计数逐渐增加。研究结果可为接触带复合岩体力学特性分析提供参考。
In order to study the deformation and failure characteristics of contact zone composite rock mass, the cement, sand and gypsum are used as similar material to make specimens with two different strength materials. By uniaxial compression test, influence of similar material strength and high strength material volume ratio on the mechanical properties of composite specimens is analyzed. The results show that:(1) The larger the strength ratio of the similar material, the greater the impact on the overall strength of the composite specimens; the change of the volume ratio of the higher strength material has a significant impact on the overall strength of the composite specimens.(2) When the similar material strength ratio is 1.74, the rupture plane passes through composite specimen end to similar material contact surface; when it up to 2.49, the rupture plane extends from contact surface to both ends of the composite specimen; when it to 4.33, the composite specimens failure gradually changes from both ends into low strength material end.(3) There is a corresponding relationship between variation of acoustic emission(AE) counts and damage location and shape of composite specimens. With strength ratio of the similar material increasing, AE counts of high strength material end gradually decreased and low strength material end gradually increased. The study provides a theoretical reference for the strength analysis of contact zone composite rock mass.
In order to study the deformation and failure characteristics of contact zone composite rock mass, the cement, sand and gypsum are used as similar material to make specimens with two different strength materials. By uniaxial compression test, influence of similar material strength and high strength material volume ratio on the mechanical properties of composite specimens is analyzed. The results show that:(1) The larger the strength ratio of the similar material, the greater the impact on the overall strength of the composite specimens; the change of the volume ratio of the higher strength material has a significant impact on the overall strength of the composite specimens.(2) When the similar material strength ratio is 1.74, the rupture plane passes through composite specimen end to similar material contact surface; when it up to 2.49, the rupture plane extends from contact surface to both ends of the composite specimen; when it to 4.33, the composite specimens failure gradually changes from both ends into low strength material end.(3) There is a corresponding relationship between variation of acoustic emission(AE) counts and damage location and shape of composite specimens. With strength ratio of the similar material increasing, AE counts of high strength material end gradually decreased and low strength material end gradually increased. The study provides a theoretical reference for the strength analysis of contact zone composite rock mass.
引文
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[15]姚池,李姚,姜清辉,等.应力作用下软硬互层岩石破裂过程的细观模拟[J].岩石力学与工程学报,2015,34(8):1542-1551.YAO Chi,LI Yao,JIANG Qing-hui,et al.Mesoscopic model of failure process of interlayered rock under compression[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(8):1542-1551.
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[17]董金玉,杨继红,杨国香,等.基于正交设计的模型试验相似材料的配比试验研[J].煤炭学报,2012,37(1):44-49.DONG Jin-yu,YANG Ji-hong,YANG Guo-xiang,et al.Research on similar material proportioning test of model test based on orthogonal design[J].Journal of China Coal Society,2012,37(1):44-49.
[18]武伯弢,朱合华,徐前卫,等.IV级软弱围岩相似材料的试验研究[J].岩土力学,2013,34(增刊1):109-116.WU Bo-tao,ZHU He-hua,XU Qian-wei,et al.Experimental study of similar material for weak surrounding rock mass of class IV[J].Rock and Soil Mechanics,2013,34(Supp.1):109-116.
[19]SINNATHAMBY G,TANTTU L K,JUAN G F.Interface shear behaviour of tunnel backfill materials in a deep-rock nuclear waste repository in Finland[J].Soils and Foundations,2014,54(4):777-788.
[20]阳友奎,蒋为民.复合岩石的破坏准则[J].重庆大学学报,1990,13(6):19-25.YANG You-kui,JIANG Wei-min.A failure criterion of composite rock[J].Journal of Chongqing University,1990,13(6):19-25.
[2]王新利,顾雪祥,彭义伟,等.新疆博罗科努成矿带东段矽卡岩型铁铜多金属矿床:地质特征、成矿背景与找矿潜力[J].岩石学报,2016,32(5):1315-1332.WANG Xin-li,GU Xue-xiang,PENG Wei-yi.Geological features,metallogenic setting and exploration potential of the skarn Fe-Cu polymetallic deposits in the eastern segment of the Boluokenu mineralization belt,Xinjiang[J].Acta Petrologica Sinica,2016,32(5):1315
[3]王其虎.地下开采中接触带复合岩体非协调变形及控制研究[博士学位论文D].武汉:武汉科技大学,2015.WANG Qi-hu.Study on contact zone composite rock mass incompatible deformation and control in underground mining[D].Wuhan:Wuhan University of Science and Technology,2015.
[4]YASSAGHIA A,Salari-Rad H.Squeezing rock conditions at an igneous contact zone in the Taloun tunnels,Tahran-Shomal freeway,Iran:A case study[J].International Journal of Rock Mechanics and Mining Sciences,2005,42(1):195-208.
[5]FENG W K,HUANG R Q,LI T B.Deformation analysis of a soft-hard rock contact zone surrounding a tunnel[J].Tunnelling and Underground Space Technology,2012,32(1):190-197.
[6]赵兴东,唐春安,田军.进路分步开挖背景应力场演化规律研究[J].岩土力学,2007,28(4):659-662.ZHAO Xing-dong,TANG Chun-an,TIAN Jun.Study on evolvement law of background stress field of multi-step excavation of roadway[J].Rock and Soil Mechanics,2007,28(4):659-662.
[7]邹磊,来兴平,王宁波,等.复杂地质条件下急斜厚煤层巷道变形特[J].西安科技大学学报,2010,30(2):145-149.ZOU Lei,LAI Xing-ping,WANG Ning-bo,et al.Roadway deformation characteristics of steep-thick coal seam under complicated geological conditions[J].Journal of Xi’an University of Science and Technology,2010,30(2):145-149.
[8]唐礼忠,陈源,邓丽凡,等.扰动下含接触带巷道围岩力学响应及控制研究[J].铁道科学与工程学报,2016,13(2):309-315.TANG Zhong-li,CHEN Yuan,DENG Li-fan,et al.The mechanical response features and control of surrounding rock with contact zone under dynamic disturbance[J].Journal of Railway Science and Engineering,2016,13(2):309-315.
[9]INDRARATNA B,JAYANATHAN M,BROWN E T,et al.Effect of soil-infilled joints on the stability of rock wedges formed in a tunnel roof[J].International Journal of Rock Mechanics and Mining Sciences,2010,47(5):739-751.
[10]李同录,罗世毅,何剑,等.节理岩体力学参数的选取与应用[J].岩石力学与工程学报,2004,23(13):2182-2186.LI Tong-lu,LUO Shi-yi,HE Jian,et al.Determination and application of mechanical parameters for jointed rock masses[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(13):2182-2186.
[11]张桂民,李银平,杨长来,等.软硬互层盐岩变形破损物理模拟试验研[J].岩石力学与工程学报,2012,32(9):1813-1820.ZHANG Gui-min,LI Yin-ping,YANG Chang-lai,et al.Physical simulation of deformation and failure mechanism of soft and hard interbedded salt rocks[J].Chinese Journal of Rock Mechanics and Engineering,2012,32(9):1813-1820.
[12]张波,李术才,张敦福,等.含充填节理岩体相似材料试件单轴压缩试验及断裂损伤研[J].岩土力学,2012,33(6):1647-1652.ZHANG Bo,LI Shu-cai,ZHANG Dun-fu,et al.Uniaxial compression mechanical property test,fracture and damage analysis of similar material of jointed rock mass with filled cracks[J].Rock and Soil Mechanics,2012,33(6):1647-1652.
[13]张波,李术才,杨学英,等.含交叉裂隙岩体相似材料试件力学性能单轴压缩试验[J].岩土力学,2012,33(12):3674-3679.ZHANG Bo,LI Shu-cai,YANG Xue-yin,et al.Uniaxial compression tests on mechanical properties of rock mass similar material with cross-cracks[J].Rock and Soil Mechanics,2012,33(12):3674-3679.
[14]腾俊洋,唐建新,张宇宁,等.单轴压缩下层状含水页岩损伤破坏过程及特征[J].岩土力学,2017,38(6):1629-1638,1646.TENG Jun-yang,TANG Jian-xin,ZHANG Yu-ning,et al.Damage process and characteristics of layered waterbearing shale under uniaxial compression[J].Rock and Soil Mechanics,2017,38(6):1629-1638,1646.
[15]姚池,李姚,姜清辉,等.应力作用下软硬互层岩石破裂过程的细观模拟[J].岩石力学与工程学报,2015,34(8):1542-1551.YAO Chi,LI Yao,JIANG Qing-hui,et al.Mesoscopic model of failure process of interlayered rock under compression[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(8):1542-1551.
[16]陈宇龙,张宇宁,李科斌,等.单轴压缩下软硬互层岩石破裂过程的离散元数值分析[J].采矿与安全工程学报,2017,34(4):795-802+816.CHEN Yu-long,ZHANG Yi-ning,LI Ke-bin,et al.Distinct element numerical analysis of failure process of interlayered rock subjected to uniaxial compression[J].Journal of Mining and Safety Engineering,2017,34(4):795-802,816.
[17]董金玉,杨继红,杨国香,等.基于正交设计的模型试验相似材料的配比试验研[J].煤炭学报,2012,37(1):44-49.DONG Jin-yu,YANG Ji-hong,YANG Guo-xiang,et al.Research on similar material proportioning test of model test based on orthogonal design[J].Journal of China Coal Society,2012,37(1):44-49.
[18]武伯弢,朱合华,徐前卫,等.IV级软弱围岩相似材料的试验研究[J].岩土力学,2013,34(增刊1):109-116.WU Bo-tao,ZHU He-hua,XU Qian-wei,et al.Experimental study of similar material for weak surrounding rock mass of class IV[J].Rock and Soil Mechanics,2013,34(Supp.1):109-116.
[19]SINNATHAMBY G,TANTTU L K,JUAN G F.Interface shear behaviour of tunnel backfill materials in a deep-rock nuclear waste repository in Finland[J].Soils and Foundations,2014,54(4):777-788.
[20]阳友奎,蒋为民.复合岩石的破坏准则[J].重庆大学学报,1990,13(6):19-25.YANG You-kui,JIANG Wei-min.A failure criterion of composite rock[J].Journal of Chongqing University,1990,13(6):19-25.