考虑软弱夹层的含孔洞大理岩力学特性模拟分析

摘要/Abstract

摘要： 天然岩体中常含有孔洞和软弱夹层等缺陷,为研究含1条软弱夹层与中心孔洞的大理岩在单轴压缩作用下的破坏模式和力学特性,采用数值模拟软件RFPA2D对试样破裂过程进行了模拟。结果表明:软弱夹层的存在改变了大理岩试样的破坏模式,当软弱夹层强度比较低,厚度比较大时,软弱夹层下部的大理岩基本不出现破坏;当软弱夹层强度不变时,大理岩试样的峰值应力随着软弱夹层厚度的增加而减小,峰值应力对应的应变随着软弱夹层厚度的增加而增加;当软弱夹层厚度不变时,大理岩试样的峰值应力随着软弱夹层强度的增加而增加,峰值应力对应的应变随着软弱夹层强度的增加而减小。研究结果对比揭示了不同厚度和强度软弱夹层含孔洞大理岩的破坏模式和力学特性,可为软弱夹层上部建设的岩体工程失稳破坏提供一定的参考。

关键词: 软弱夹层, 孔洞, 大理岩, 力学特性, 数值模拟

Abstract: To study the failure mode and mechanical properties of marble with one weak intercalation and central hole under uniaxial compression, the fracture process of the sample is simulated by the numerical simulation software RFPA2D. The results show that the existence of the weak intercalation changes the failure mode of the marble sample. When the strength of the weak intercalation is lower and the thickness is larger, the marble under the weak intercalation basically does not appear failure. When the strength of the weak intercalation is unchanged, the peak stress of the marble sample decreases with the increase of the thickness of the weak intercalation, and the strain corresponding to the peak stress increases with the increase of the thickness of the weak intercalation. When the thickness of the weak intercalation is constant, the peak stress of marble sample increases with the increase of the strength of the weak intercalation, and the strain corresponding to the peak stress decreases with the increase of the strength of the weak intercalation. The results reveal the failure mode and mechanical characteristics of marble containing holes with different thickness and strength weak intercalation, which provides some reference for the instability failure of the rock mass engineering in the upper part of the weak intercalation.

Key words: weak intercalation, hole, marble, mechanical property, simulation analysis

中图分类号:

TU452

罗许林, 王国柱, 郝亚勋. 考虑软弱夹层的含孔洞大理岩力学特性模拟分析[J]. 硅酸盐通报, 2021, 40(2): 521-526.

LUO Xulin, WANG Guozhu, HAO Yaxun. Simulation Analysis of Mechanical Properties of Marble Containing Hole with Weak Intercalation[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 521-526.

参考文献

[1] HU Q J, GU Y C, ZENG J S, et al. Microwave irradiation reinforcement of weak muddy intercalation in slope[J]. Applied Clay Science, 2019, 183: 105324.
[2] 孙盛玥,李迎春,唐春安,等.天然岩石节理双阶粗糙度分形特征研究[J].岩石力学与工程学报,2019,38(12):2502-2511.
SUN S Y, LI Y C, TANG C A, et al. Dual fractal features of the surface roughness of natural rock joints[J]. Chinese Journal of Rock Mechanics and Engineering, 2019, 38(12): 2502-2511 (in Chinese).
[3] 王永岩,张金龙,张余标.单裂隙类岩石强度特性及蠕变模型的实验研究[J].科学技术与工程,2018,18(18):94-100.
WANG Y Y, ZHANG J L, ZHANG Y B. The experimental investigation of single fracture rock strength characteristics and creep model by experiment[J]. Science Technology and Engineering, 2018, 18(18): 94-100 (in Chinese).
[4] WU H, ZHAO G Y, LIANG W Z. Mechanical properties and fracture characteristics of pre-holed rocks subjected to uniaxial loading: a comparative analysis of five hole shapes[J]. Theoretical and Applied Fracture Mechanics, 2020, 105: 102433.
[5] 刘红岩.宏细观缺陷对岩体力学特性及边坡稳定影响研究[J].岩土力学,2019,40(s1):431-439+448.
LIU H Y. Influence of macroscopic and mesoscopic flaws on mechanical behavior of rock mass and slope stability[J]. Rock and Soil Mechanics, 2019, 40(s1): 431-439+448 (in Chinese).
[6] JEON S, KIM J, SEO Y, et al. Effect of a fault and weak plane on the stability of a tunnel in rock—a scaled model test and numerical analysis[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41: 658-663.
[7] 陈鑫,张泽,李东庆,等.软弱夹层对水泥土单轴压缩影响研究[J].岩石力学与工程学报,2020,39(2):398-412.
CHEN X, ZHANG Z, LI D Q, et al. Study on the influence of weak interlayer on uniaxial compression behaviors of cement soils[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(2): 398-412 (in Chinese).
[8] ZUO J P, WANG Z F, ZHOU H W, et al. Failure behavior of a rock-coal-rock combined body with a weak coal interlayer[J]. International Journal of Mining Science and Technology, 2013, 23(6): 907-912.
[9] 蒲成志,贺桂成,朱忠华.含软弱夹层板岩抗剪强度试验及表征方法[J].工程地质学报,2019,27(3):525-531.
PU C Z, HE G C, ZHU Z H. Test and characterization method for shear strength of slate containing weak intercalated layer[J]. Journal of Engineering Geology, 2019, 27(3): 525-531 (in Chinese).
[10] 汤友生,姚海林,廖阳,等.软弱夹层倾角对煤系砂岩物理力学特性的影响研究[J].矿业研究与开发,2018,38(8):51-55.
TANG Y S, YAO H L, LIAO Y, et al. Study on the influences of weak interlayer inclination on physical mechanics properties of coal bearing sandstone[J]. Mining Research and Development, 2018, 38(8): 51-55 (in Chinese).
[11] 许旭堂,简文彬,林玫玲,等.循环荷载下含软弱夹层岩体声学特性试验研究[J].工程地质学报,2016,24(6):1170-1176.
XU X T, JIAN W B, LIN M L, et al. Research on the swcc of unsaturated natural residual soil[J]. Journal of Engineering Geology, 2016, 24(6): 1170-1176 (in Chinese).
[12] CARTER B J, LAJTAI E Z, YUAN Y G. Tensile fracture from circular cavities loaded in compression[J]. International Journal of Fracture, 1992, 57(3): 221-236.
[13] CARTER B J, LAJTAI E Z, PETUKHOV A. Primary and remote fracture around underground cavities[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1991, 15(1): 21-40.
[14] HOEK E, BROWN E T. Underground excavations in rock[M]. London: The Institute of Mining and Metallurgy, 1980.
[15] ZHAO X D, ZHANG H X, ZHU W C. Fracture evolution around pre-existing cylindrical cavities in brittle rocks under uniaxial compression[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(3): 806-815.
[16] 朱谭谭,靖洪文,苏海健,等.含双圆形孔洞砂岩单轴压缩力学特性试验研究[J].岩土工程学报,2015,37(6):1047-1056.
ZHU T T, JING H W, SU H J, et al. Mechanical behavior of sandstone containing double circular cavities under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(6): 1047-1056 (in Chinese).
[17] 韩观胜,靖洪文,苏海健,等.预制双圆形孔洞砂岩强度与变形破坏特征[J].煤炭学报,2017,42(4):871-878.
HAN G S, JING H W, SU H J, et al. Experimental study on compressive strength and fracture characteristics of sandstone containing double circular cavities[J]. Journal of China Coal Society, 2017, 42(4): 871-878 (in Chinese).
[18] 张闯,唐建新,腾俊洋,等.孔洞数量及孔径对大理岩力学特性影响的试验研究[J].岩土力学,2017,38(s2):41-50.
ZHANG C, TANG J X, TENG J Y, et al. Experimental study of influences of pore number and pore size on mechanical properties of marble[J]. Rock and Soil Mechanics, 2017, 38(s2): 41-50 (in Chinese).
[19] 左江江,李臣林,腾俊洋,等.充填物对含孔洞大理岩力学特性影响规律试验研究[J].工程科学学报,2018,40(7):776-782.
ZUO J J, LI C L, TENG J Y, et al. Experimental study of the influence of the filling material on the mechanical properties of marble with holes[J]. Chinese Journal of Engineering, 2018, 40(7): 776-782 (in Chinese).
[20] 周亚楠,朱泉企,李地元,等.含充填椭圆形孔洞砂岩力学破坏特性试验研究[J].铁道科学与工程学报,2019,16(8):1938-1946.
ZHOU Y N, ZHU Q Q, LI D Y, et al. Experimental study on mechanical and failure characteristics of sandstone with a filled elliptical hole[J]. Journal of Railway Science and Engineering, 2019, 16(8): 1938-1946 (in Chinese).
[21] 李地元,成腾蛟,周韬,等.冲击载荷作用下含孔洞大理岩动态力学破坏特性试验研究[J].岩石力学与工程学报,2015,34(2):249-260.
LI D Y, CHENG T J, ZHOU T, et al. Experimental study of the dynamic strength and fracturing characteristics of marble specimens with a single hole under impact loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(2): 249-260 (in Chinese).
[22] 李地元,刘濛,韩震宇,等.含孔洞层状砂岩动态压缩力学特性试验研究[J].煤炭学报,2019,44(5):1349-1358.
LI D Y, LIU M, HAN Z Y, et al. Dynamic compressive mechanical properties of bedding sandstone with pre-existing hole[J]. Journal of China Coal Society, 2019, 44(5): 1349-1358 (in Chinese).
[23] 李夕兵,翁磊,谢晓锋,等.动静载荷作用下含孔洞硬岩损伤演化的核磁共振特性试验研究[J].岩石力学与工程学报,2015,34(10):1985-1993.
LI X B, WENG L, XIE X F, et al. Study on the degradation of hard rock with a pre-existing opening under static-dynamic loadings using nuclear magnetic resonance technique[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(10): 1985-1993 (in Chinese).[24] 谢林茂,朱万成,王述红,等.含孔洞岩石试样三维破裂过程的并行计算分析[J].岩土工程学报,2011,33(9):1447-1455.
XIE L M, ZHU W C, WANG S H, et al. Three-dimensional parallel computing on failure process of rock specimen with a pre-existing circular opening[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(9): 1447-1455 (in Chinese).
[25] 黎崇金,李夕兵,李地元.含孔洞大理岩破坏特性的颗粒流分析[J].工程科学学报,2017,39(12):1791-1801.
LI C J, LI X B, LI D Y. Particle flow analysis of fracture characteristics of marble with a single hole[J]. Chinese Journal of Engineering, 2017, 39(12): 1791-1801 (in Chinese).
[26] 段进超,唐春安,常旭.脆性基多孔材料孔洞的尺寸效应及其破坏模式研究[J].岩土力学,2007,28(3):631-634.
DUAN J C, TANG C A, CHANG X. A study on hole size effects and failure mode of brittle materials containing multiple holes[J]. Rock and Soil Mechanics, 2007, 28(3): 631-634 (in Chinese).
[27] 梁利喜,周龙涛,刘向君,等.孔洞结构对超声波衰减特性的影响研究[J].岩石力学与工程学报,2015,34(s1):3208-3214.
LIANG L X, ZHOU L T, LIU X J, et al. Study of effect of pore structure on ultrasonic attenuation[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(s1): 3208-3214 (in Chinese).
[28] 张丹丹,邹绍明,曾欣,等.单孔洞岩石的超声波数值模拟研究[J].地下空间与工程学报,2017,13(s1):22-27.
ZHANG D D, ZOU S M, ZENG X, et al. Numerical modeling of ultrasonic wave in single rock hole[J]. Chinese Journal of Underground Space and Engineering, 2017, 13(s1): 22-27 (in Chinese).
[29] 黄明利,唐春安,朱万成.岩石破裂过程的数值模拟研究[J].岩石力学与工程学报,2000,19(4):468-471.
HUANG M L, TANG C A, ZHU W C. Numerical simulation on failure process of rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2000, 19(4): 468-471 (in Chinese).