裂隙倾角对泥质白云岩强度影响试验研究
|
摘要
地下岩体中普遍存在的裂隙是影响岩体拉压性能的重要因素之一。依托贵阳轨道交通工程,采集泥质白云岩,开展劈裂试验和单轴压缩试验,分析了不同裂隙角度对泥质白云岩拉、压性能的影响。结果表明:(1)劈裂试验中,泥质白云岩抗拉强度为3～7 MPa,平均值为5. 03 MPa,抗拉强度随裂隙角度的增大呈下降趋势,劈裂模量为0. 1～2. 84 GPa,整体呈幂函数下降趋势;(2)泥质白云岩的抗压强度较高,分布在60～130 MPa之间,平均抗压强度为87. 25 MPa;随裂隙角度的增大,试样抗压强度呈先减小后增大趋势;通过理论推导,得出岩体中最易破裂裂隙角度为22. 5°～45°,与试验结果相符;弹性模量随裂隙倾角整体呈上升趋势;(3)通过对泥质白云岩拉压强度对比,得出泥质白云岩抗压强度平均值与抗拉强度平均值之比为18. 97。
The common fracture in underground rock mass are one of the important factors affecting the tensile and compressive properties of rock mass. Depending on Guiyang Rail Transit Project,argillaceous dolomite is collected,splitting test and uniaxial compression test are carried out,and the effects of different fracture angles on the tensile and compressive properties of argillaceous dolomite are analyzed. The results show as follows.(1) In the splitting test,the tensile strength of argillaceous dolomite is 3 ～ 7 MPa,the average value is 5. 03 MPa. The tensile strength decreases with the increase of fracture angle,and the splitting modulus is 0. 1 ～ 2. 84 GPa,which shows a power function decreasing trend as a whole.(2) The compressive strength of argillaceous dolomite is relatively high,ranging from 60 MPa to 130 MPa,with an average compressive strength of 87. 25 MPa. With the increase of fracture angle,the compressive strength of specimens decreases first and then increases. Through theoretical deduction,it is concluded that the angle of the most fragile fracture in rock mass is 22. 5° ～ 45°,which is consistent with the test results. The modulus of elasticity increases with the inclination of the fracture as a whole.(3) By comparing the tensile and compressive strength of argillaceous dolomite,the ratio of the average compressive strength to the average tensile strength of argillaceous dolomite is 18. 97.
The common fracture in underground rock mass are one of the important factors affecting the tensile and compressive properties of rock mass. Depending on Guiyang Rail Transit Project,argillaceous dolomite is collected,splitting test and uniaxial compression test are carried out,and the effects of different fracture angles on the tensile and compressive properties of argillaceous dolomite are analyzed. The results show as follows.(1) In the splitting test,the tensile strength of argillaceous dolomite is 3 ～ 7 MPa,the average value is 5. 03 MPa. The tensile strength decreases with the increase of fracture angle,and the splitting modulus is 0. 1 ～ 2. 84 GPa,which shows a power function decreasing trend as a whole.(2) The compressive strength of argillaceous dolomite is relatively high,ranging from 60 MPa to 130 MPa,with an average compressive strength of 87. 25 MPa. With the increase of fracture angle,the compressive strength of specimens decreases first and then increases. Through theoretical deduction,it is concluded that the angle of the most fragile fracture in rock mass is 22. 5° ～ 45°,which is consistent with the test results. The modulus of elasticity increases with the inclination of the fracture as a whole.(3) By comparing the tensile and compressive strength of argillaceous dolomite,the ratio of the average compressive strength to the average tensile strength of argillaceous dolomite is 18. 97.
引文
1张伟,周国庆,张海波,等.倾角对裂隙岩体力学特性影响试验模拟研究[J].中国矿业大学学报,2009,38(1):30-33Zhang Wei,Zhou Guoqing,Zhang Haibo,et al.Experimental simulation study on influence of inclination on mechanical properties of fractured rock mass[J].Journal of China University of Mining and Technology,2009,38(1):30-33
2孙朝阳.不同裂隙角度对岩体强度影响研究[J].煤炭技术,2015,34(6):113-115Sun Zhaoyang.Influence of different fissure angles on strength of rock mass[J].Coal Technology,2015,34(6):113-115
3吴文,王贵宾,冒海军.白云岩力学强度特性的孔隙影响研究[J].岩土力学,2010,31(12):3709-3714Wu Wen,Wang Guibin,Mao Haijun.Study on pore influence of mechanical strength characteristics of dolomite[J].Geotechnical Mechanics,2010,31(12):3709-3714
4刘超,马天辉,成小雨.不同角度结构面条件下裂隙煤岩破坏特征[J].煤矿安全,2015,46(9):218-220Liu Chao,Ma Tianhui,Cheng Xiaoyu.Failure characteristics of fractured coal and rock under different structural plane conditions[J].Coal Safety,2015,46(9):218-220
5蒲成志,曹平,赵延林,等.单轴压缩下多裂隙类岩石材料强度试验与数值分析[J].岩土力学,2010,31(11):3661-3666Pu Chengzhi,Cao Ping,Zhao Yanlin,et al.Strength test and numerical analysis of multi fissured rock materials under uniaxial compression[J].Geotechnical Mechanics,2010,31(11):3661-3666
6刘学伟,刘泉声,刘滨,等.侧向压力对裂隙岩体破坏形式及强度特性的影响[J].煤炭学报,2014,31(12):2405-2411Liu Xuewei,Liu Quansheng,Liu Bin,et al.The effect of lateral pressure on failure modes and strength characteristics of fractured rock mass[J].Journal of Coal,2014,31(12):2405-2411
7谢统冠,陆瑞全,崔光祖,等.单轴压缩下倾角对岩体模拟试件强度的影响分析[C]//北京力学会第二十三届学术年会.北京:北京力学会,2017:245-247Xie Tongguan,Lu Ruiquan,Cui Guangzu,et al.The influence of uniaxial compression down angle on the strength of rock mass simulation specimens[C]//The Twenty-third Annual Meeting of the Beijing Mechanical Association.Beijing:Beijing Mechanical Association,2017:245-247
8苏承东,张盛,唐旭.砂岩巴西劈裂疲劳破坏过程中变形与强度特征的试验研究[J].岩土力学与工程学报,2013,32(1):41-48Su Chengdong,Zhang Sheng,Tang Xu.Experimental study on the characteristics of deformation and strength during the fracture process of Brazil sandstone fracture[J].Journal of Geotechnical Mechanics and Engineering,2013,32(1):41-48
9刘天宇,万文,王亚,等.巴西劈裂试验对岩石抗拉强度影响因素研究[J].矿业工程研究,2016,31(4):1-7Liu Tianyu,Wan Wen,Wang Ya,et al.Study on the factors affecting the tensile strength of rock in Brazil splitting test[J].Research on Mining Engineering,2016,31(4):1-7
10刘晓辉,戴峰,刘建锋,等.考虑层理方向煤岩的静动巴西劈裂试验研究[J].岩土力学与工程学报,2015,34(10):2098-2105Liu Xiaohui,Dai Feng,Liu Jianfeng,et al.Consider the static and dynamic Brazil splitting test of coal rock in the direction of bedding study[J].Journal of Geotechnical Mechanics and Engineering,2015,34(10):2098-2105
11喻勇,王天雄.三峡花岗岩劈裂抗拉特性与弹性模量关系的研究[J].岩土力学与工程学报,2004,23(19):3258-3261Yu Yong,Wang Tianxiong.Study on the relationship between splitting tensile properties and elastic modulus of Three Gorges granite[J].Journal of Geotechnical Mechanics and Engineering,2004,23(19):3258-3261
12陈招军,王乐华,金晶,等.三种岩石巴西劈裂及单轴压缩试验对比研究[J].水力发电,2015,41(11):34-38Chen Zhaojun,Wang Lehua,Jin Jing,et al.Comparative study on splitting and uniaxial compression tests of three kinds of rocks in Brazil[J].Hydroelectric Power Generation,2015,41(11):34-38
13李夕兵,罗琳,黎崇金.考虑岩石交界面方向效应的巴西劈裂试验研究[J].工程科学学报,2017,39(9):1295-1304Li Xibing,Luo ling,Li Chongjin.Experimental study on splitting of Brazil considering the directional effect of rock interface[J].Journal of Engineering Science,2017,39(9):1295-1304
2孙朝阳.不同裂隙角度对岩体强度影响研究[J].煤炭技术,2015,34(6):113-115Sun Zhaoyang.Influence of different fissure angles on strength of rock mass[J].Coal Technology,2015,34(6):113-115
3吴文,王贵宾,冒海军.白云岩力学强度特性的孔隙影响研究[J].岩土力学,2010,31(12):3709-3714Wu Wen,Wang Guibin,Mao Haijun.Study on pore influence of mechanical strength characteristics of dolomite[J].Geotechnical Mechanics,2010,31(12):3709-3714
4刘超,马天辉,成小雨.不同角度结构面条件下裂隙煤岩破坏特征[J].煤矿安全,2015,46(9):218-220Liu Chao,Ma Tianhui,Cheng Xiaoyu.Failure characteristics of fractured coal and rock under different structural plane conditions[J].Coal Safety,2015,46(9):218-220
5蒲成志,曹平,赵延林,等.单轴压缩下多裂隙类岩石材料强度试验与数值分析[J].岩土力学,2010,31(11):3661-3666Pu Chengzhi,Cao Ping,Zhao Yanlin,et al.Strength test and numerical analysis of multi fissured rock materials under uniaxial compression[J].Geotechnical Mechanics,2010,31(11):3661-3666
6刘学伟,刘泉声,刘滨,等.侧向压力对裂隙岩体破坏形式及强度特性的影响[J].煤炭学报,2014,31(12):2405-2411Liu Xuewei,Liu Quansheng,Liu Bin,et al.The effect of lateral pressure on failure modes and strength characteristics of fractured rock mass[J].Journal of Coal,2014,31(12):2405-2411
7谢统冠,陆瑞全,崔光祖,等.单轴压缩下倾角对岩体模拟试件强度的影响分析[C]//北京力学会第二十三届学术年会.北京:北京力学会,2017:245-247Xie Tongguan,Lu Ruiquan,Cui Guangzu,et al.The influence of uniaxial compression down angle on the strength of rock mass simulation specimens[C]//The Twenty-third Annual Meeting of the Beijing Mechanical Association.Beijing:Beijing Mechanical Association,2017:245-247
8苏承东,张盛,唐旭.砂岩巴西劈裂疲劳破坏过程中变形与强度特征的试验研究[J].岩土力学与工程学报,2013,32(1):41-48Su Chengdong,Zhang Sheng,Tang Xu.Experimental study on the characteristics of deformation and strength during the fracture process of Brazil sandstone fracture[J].Journal of Geotechnical Mechanics and Engineering,2013,32(1):41-48
9刘天宇,万文,王亚,等.巴西劈裂试验对岩石抗拉强度影响因素研究[J].矿业工程研究,2016,31(4):1-7Liu Tianyu,Wan Wen,Wang Ya,et al.Study on the factors affecting the tensile strength of rock in Brazil splitting test[J].Research on Mining Engineering,2016,31(4):1-7
10刘晓辉,戴峰,刘建锋,等.考虑层理方向煤岩的静动巴西劈裂试验研究[J].岩土力学与工程学报,2015,34(10):2098-2105Liu Xiaohui,Dai Feng,Liu Jianfeng,et al.Consider the static and dynamic Brazil splitting test of coal rock in the direction of bedding study[J].Journal of Geotechnical Mechanics and Engineering,2015,34(10):2098-2105
11喻勇,王天雄.三峡花岗岩劈裂抗拉特性与弹性模量关系的研究[J].岩土力学与工程学报,2004,23(19):3258-3261Yu Yong,Wang Tianxiong.Study on the relationship between splitting tensile properties and elastic modulus of Three Gorges granite[J].Journal of Geotechnical Mechanics and Engineering,2004,23(19):3258-3261
12陈招军,王乐华,金晶,等.三种岩石巴西劈裂及单轴压缩试验对比研究[J].水力发电,2015,41(11):34-38Chen Zhaojun,Wang Lehua,Jin Jing,et al.Comparative study on splitting and uniaxial compression tests of three kinds of rocks in Brazil[J].Hydroelectric Power Generation,2015,41(11):34-38
13李夕兵,罗琳,黎崇金.考虑岩石交界面方向效应的巴西劈裂试验研究[J].工程科学学报,2017,39(9):1295-1304Li Xibing,Luo ling,Li Chongjin.Experimental study on splitting of Brazil considering the directional effect of rock interface[J].Journal of Engineering Science,2017,39(9):1295-1304
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |