干燥和饱水状态下含层理构造板岩巴西劈裂实验能量研究
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摘要
为研究干燥和饱水状态下不同层理角度板岩的力学特性和能量特性,对5种不同的层理角度板岩的圆柱试样进行巴西劈裂实验,获得其能量特性。研究结果表明:板岩试样的吸收能随着载荷的增大呈非线性增大,且增大速率随着层理角度的增大而减小;不同层理板岩的峰值能率和峰值载荷具有明显的各向异性特征,随着层理角度的增大而减小,且当层理角度θ=90°时,层理效应系数最大;水对板岩试样的峰值能率和峰值载荷有着不同程度的降低作用,其降低系数Kw为0.52~0.74,降低系数Kp为0.48~0.68;在干燥和饱水这2种状态下,板岩的峰值能率与抗拉强度呈现较强的线性关系,且峰值能率随着抗拉强度的增大而增大。
In order to study the different bedding orientations' slates of mechanical properties and energy characteristics in dry and saturated condition, five beddings of cylindrical specimen slate in Brazil splitting test were selected, and the law of energy characteristics was obtained. The results show that the absorbed energy grows nonlinearly with the increase of load and the growth rate decreases with the increase of the angle of bedding. The anisotropic characteristics of the peak energy rate and the peak load are highly distinct, and they decrease with the increase of the angle of bedding. The most obvious effect of stratification is found at the angle of ?(28) 90°. Different reducing influences of the peak energy rate and the peak load of slates are found after reaching water-saturated state, reduction coefficient of Kw is 0.52-0.74 and the reduction coefficient of Kp is 0.48-0.68. In two states, the peak energy rate and tensile strength of slate show a strong linear relationship, and the peak rate of slate increases with the increase of tensile strength.
In order to study the different bedding orientations' slates of mechanical properties and energy characteristics in dry and saturated condition, five beddings of cylindrical specimen slate in Brazil splitting test were selected, and the law of energy characteristics was obtained. The results show that the absorbed energy grows nonlinearly with the increase of load and the growth rate decreases with the increase of the angle of bedding. The anisotropic characteristics of the peak energy rate and the peak load are highly distinct, and they decrease with the increase of the angle of bedding. The most obvious effect of stratification is found at the angle of ?(28) 90°. Different reducing influences of the peak energy rate and the peak load of slates are found after reaching water-saturated state, reduction coefficient of Kw is 0.52-0.74 and the reduction coefficient of Kp is 0.48-0.68. In two states, the peak energy rate and tensile strength of slate show a strong linear relationship, and the peak rate of slate increases with the increase of tensile strength.
引文
[1]赵文.岩石力学[M].长沙:中南大学出版社,2010:55-56.ZHAO Wen.Rcok mechanics[M].Changsha:Central South University Press,2010:55-56.
[2]朱珍德,张爱军,邢福东,等.岩石抗压强度与试件尺寸相关性试验研究[J].河海大学学报(自然科学版),2004,32(1):42-45.ZHU Zhende,ZHANG Aijun,XING Fudong,et al.Experimental study on correlation between compressive strength of rocks and sample size[J].Journal of Hohai University(Science and Technology),2004,32(1):42-45.
[3]何满潮,胡江春,熊伟,等.岩石抗拉强度特性的劈裂试验分析[J].矿业研究与开发,2005,25(2):12-16.HE Manchao,HU Jiangchun,XIONG Wei,et al.Splitting test analysis of tensile strength characteristics of rock[J].Mining Research and Development,2005,25(2):12-16.
[4]赵平劳,姚增.层状岩石动静态力学参数相关性的各向异性[J].兰州大学学报(自然科学版),1993,29(4):225-229.ZHAO Pinglao,YAO Zeng.Anisotropic correlation of dynamic and static mechanical parameters of layered rock[J].Journal of Lanzhou University(Science and Technology),1993,29(4):225-229.
[5]尤明庆,苏承东.平台巴西圆盘劈裂和岩石抗拉强度的试验研究[J].岩石力学与工程学报,2004,23(18):3106-3112.YOU Mingqing,SU Chengdong.Experimental study on split test with flattened disk and tensile strength of rock[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(18):3106-3112.
[6]尤明庆,陈向雷,苏承东.干燥及饱水岩石圆盘和圆环的巴西劈裂强度[J].岩石力学与工程学报,2011,30(3):464-472.YOU Mingqing,CHEN Xianglei,SU Chengdong.Brazilian splitting strengths of discs and rings of rocks in dry and saturated conditions[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(3):464-472.
[7]宫凤强,李夕兵.巴西圆盘劈裂试验中拉伸模量的解析算法[J].岩石力学与工程学报,2010,29(5):881-891.GONG Fengjiang,LI Xibing.Analytical algorithm to estimate tensile modulus in Brazilian disk splitting tests[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(5):881-891.
[8]刘恺德,刘泉声,朱元广,等.考虑层理方向效应煤岩巴西劈裂及单轴压缩试验研究[J].岩石力学与工程学报,2013,32(2):308-316.LIU Kaide,LIU Quansheng,ZHU Yuanguan,et al.Experimental study of coal considering directivity effect of bedding plane under brazilian splitting and uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):308-316.
[9]刘运思,傅鹤林,饶军应,等.不同层理方位影响下板岩各向异性巴西圆盘劈裂试验研究[J].岩石力学与工程学报,2012,31(4):785-791.LIU Yunsai,FU Helin,RAO Junying,et al.Research on Brazilian disc splitting tests for anisotropy of slate under influence of different bedding orientations[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(4):785-791.
[10]刘运思,傅鹤林,伍毅敏.基于单弱面理论对板岩巴西劈裂试验研究[J].煤炭学报,2013,38(10):1775-1780.LIU Yunsi,FU Helin,WU Yimin,et al.Study on Brazilian splitting test for slate based on single weak plane theory[J].Journal of China Coal Society,2013,38(10):1775-1780.
[11]侯鹏,高峰,杨玉贵,等.考虑层理影响页岩巴西劈裂及声发射试验研究[J].岩土力学,2016,37(6):1603-1612.HOU Peng,GAO Feng,YANG Yugui,et al.Effect of bedding plane direction on acoustic emission characteristics of shale in Brazilian tests[J].Rock and Soil Mechanics,2016,37(6):1603-1612.
[12]侯鹏,高峰,张志镇,等.黑色页岩力学特性及气体压裂层理效应研究[J].岩石力学与工程学报,2016,35(4):670-681.HOU Peng,GAO Feng,ZHANG Zhizhen,et al.Mechanical property and bedding inclination effect on gas fracturing of black shale[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(4):670-681.
[13]侯鹏,高峰,杨玉贵,等.黑色页岩巴西劈裂破坏的层理效应研究及能量分析[J].岩土工程学报,2016,38(5):930-937.HOU Peng,GAO Feng,YANG Yugui,et al.Effect of bedding orientation on failure of black shale under Braziliantests and energy analysis[J].Chinese Journal of Geotechnical Engineering,2016,38(5):930-937.
[14]熊德国,赵忠明,苏承东,等.饱水对煤系地层岩石力学性质影响的试验研究[J].岩石力学与工程学报,2011,30(5):998-1006.XIONG Deguo,ZHAO Zhongming,SU Chengdong,et al.experimental study of effect of water-saturated state on mechanical properties of rock in coal measure strata[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(5):998-1006.
[15]中华人民共和国国家标准编写组.煤和岩石物理力学性质测定方法[R].北京:中国标准出版社,1987:32–33.The National Standards Compilation Group of People’s Republic of China.Measuring methods of physics-mechanic property for coal and rock[R].Beijing:Standards Press of China,1987:32-33.
[16]刘运思,傅鹤林,饶军应,等.基于Hoek-Brown准则对板岩抗拉强度研究[J].岩土工程学报,2013,35(6):1172-1177.LIU Yunsi,FU Helin,RAO Junying,et al.Tensile strength of slate based on Heok-Brown criterion[J].Chinese Journal of Geotechnical Engineering,2013,35(6):1172-1177.
[17]张辉,程利兴,苏承东,等.饱水煤样巴西劈裂强度和能量特征试验研究[J].中国安全生产科学技术,2015,11(12):5-10.ZHANG Hui,CHENG Lixing,SU Chengdong,et al.Experimental study on strength and energy characteristics of Brazilian split for saturated coal specimens[J].Journal of Safety Science and Technology,2015,11(12):5-10.
[2]朱珍德,张爱军,邢福东,等.岩石抗压强度与试件尺寸相关性试验研究[J].河海大学学报(自然科学版),2004,32(1):42-45.ZHU Zhende,ZHANG Aijun,XING Fudong,et al.Experimental study on correlation between compressive strength of rocks and sample size[J].Journal of Hohai University(Science and Technology),2004,32(1):42-45.
[3]何满潮,胡江春,熊伟,等.岩石抗拉强度特性的劈裂试验分析[J].矿业研究与开发,2005,25(2):12-16.HE Manchao,HU Jiangchun,XIONG Wei,et al.Splitting test analysis of tensile strength characteristics of rock[J].Mining Research and Development,2005,25(2):12-16.
[4]赵平劳,姚增.层状岩石动静态力学参数相关性的各向异性[J].兰州大学学报(自然科学版),1993,29(4):225-229.ZHAO Pinglao,YAO Zeng.Anisotropic correlation of dynamic and static mechanical parameters of layered rock[J].Journal of Lanzhou University(Science and Technology),1993,29(4):225-229.
[5]尤明庆,苏承东.平台巴西圆盘劈裂和岩石抗拉强度的试验研究[J].岩石力学与工程学报,2004,23(18):3106-3112.YOU Mingqing,SU Chengdong.Experimental study on split test with flattened disk and tensile strength of rock[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(18):3106-3112.
[6]尤明庆,陈向雷,苏承东.干燥及饱水岩石圆盘和圆环的巴西劈裂强度[J].岩石力学与工程学报,2011,30(3):464-472.YOU Mingqing,CHEN Xianglei,SU Chengdong.Brazilian splitting strengths of discs and rings of rocks in dry and saturated conditions[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(3):464-472.
[7]宫凤强,李夕兵.巴西圆盘劈裂试验中拉伸模量的解析算法[J].岩石力学与工程学报,2010,29(5):881-891.GONG Fengjiang,LI Xibing.Analytical algorithm to estimate tensile modulus in Brazilian disk splitting tests[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(5):881-891.
[8]刘恺德,刘泉声,朱元广,等.考虑层理方向效应煤岩巴西劈裂及单轴压缩试验研究[J].岩石力学与工程学报,2013,32(2):308-316.LIU Kaide,LIU Quansheng,ZHU Yuanguan,et al.Experimental study of coal considering directivity effect of bedding plane under brazilian splitting and uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):308-316.
[9]刘运思,傅鹤林,饶军应,等.不同层理方位影响下板岩各向异性巴西圆盘劈裂试验研究[J].岩石力学与工程学报,2012,31(4):785-791.LIU Yunsai,FU Helin,RAO Junying,et al.Research on Brazilian disc splitting tests for anisotropy of slate under influence of different bedding orientations[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(4):785-791.
[10]刘运思,傅鹤林,伍毅敏.基于单弱面理论对板岩巴西劈裂试验研究[J].煤炭学报,2013,38(10):1775-1780.LIU Yunsi,FU Helin,WU Yimin,et al.Study on Brazilian splitting test for slate based on single weak plane theory[J].Journal of China Coal Society,2013,38(10):1775-1780.
[11]侯鹏,高峰,杨玉贵,等.考虑层理影响页岩巴西劈裂及声发射试验研究[J].岩土力学,2016,37(6):1603-1612.HOU Peng,GAO Feng,YANG Yugui,et al.Effect of bedding plane direction on acoustic emission characteristics of shale in Brazilian tests[J].Rock and Soil Mechanics,2016,37(6):1603-1612.
[12]侯鹏,高峰,张志镇,等.黑色页岩力学特性及气体压裂层理效应研究[J].岩石力学与工程学报,2016,35(4):670-681.HOU Peng,GAO Feng,ZHANG Zhizhen,et al.Mechanical property and bedding inclination effect on gas fracturing of black shale[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(4):670-681.
[13]侯鹏,高峰,杨玉贵,等.黑色页岩巴西劈裂破坏的层理效应研究及能量分析[J].岩土工程学报,2016,38(5):930-937.HOU Peng,GAO Feng,YANG Yugui,et al.Effect of bedding orientation on failure of black shale under Braziliantests and energy analysis[J].Chinese Journal of Geotechnical Engineering,2016,38(5):930-937.
[14]熊德国,赵忠明,苏承东,等.饱水对煤系地层岩石力学性质影响的试验研究[J].岩石力学与工程学报,2011,30(5):998-1006.XIONG Deguo,ZHAO Zhongming,SU Chengdong,et al.experimental study of effect of water-saturated state on mechanical properties of rock in coal measure strata[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(5):998-1006.
[15]中华人民共和国国家标准编写组.煤和岩石物理力学性质测定方法[R].北京:中国标准出版社,1987:32–33.The National Standards Compilation Group of People’s Republic of China.Measuring methods of physics-mechanic property for coal and rock[R].Beijing:Standards Press of China,1987:32-33.
[16]刘运思,傅鹤林,饶军应,等.基于Hoek-Brown准则对板岩抗拉强度研究[J].岩土工程学报,2013,35(6):1172-1177.LIU Yunsi,FU Helin,RAO Junying,et al.Tensile strength of slate based on Heok-Brown criterion[J].Chinese Journal of Geotechnical Engineering,2013,35(6):1172-1177.
[17]张辉,程利兴,苏承东,等.饱水煤样巴西劈裂强度和能量特征试验研究[J].中国安全生产科学技术,2015,11(12):5-10.ZHANG Hui,CHENG Lixing,SU Chengdong,et al.Experimental study on strength and energy characteristics of Brazilian split for saturated coal specimens[J].Journal of Safety Science and Technology,2015,11(12):5-10.