山西寿阳15号煤层动静弹性参数实验研究
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摘要
利用SD-I型声波检测仪对山西寿阳15号煤层进行超声波速度测定;利用MTS815岩石伺服试验机进行强度实验,在此基础上讨论了纵波波速与煤岩强度的关系以及动静态弹性参数间的关系。结果表明:煤岩单轴抗压强度与纵波速度呈较好的指数关系,单轴抗压强度随纵波速度增大而增大;煤岩的动静态弹性模量之间存在较好的线性关系,且煤岩的动态弹性模量大于静态弹性模量;煤岩的动静态泊松比基本上呈正相关性。给出的煤岩动静态参数间的拟合关系式有助于今后做进一步研究。
Using SD-I acoustic detector,we examine the No.15 coal seam in Shouyang block of Shanxi Province.The uniaxial compressive strength test is carried out on the MTS815 Servo-controlled Rock Mechanical Test Sys-tem.We discuss the relationship between the velocity of P-wave and the coal intensity,and that between the dy-namic and static elastic parameters.Test results indicate that: uniaxial compressive strength of coal and the P-wave velocity show a good exponential relationship,uniaxial compressive strength increase with the P-wave velocity;the dynamic and static elastic modulus show a good linear relationship,and the dynamic elastic modulus is usually greater than the static elastic modulus;the static and dynamic Poisson’s ratio is positively correlated.
Using SD-I acoustic detector,we examine the No.15 coal seam in Shouyang block of Shanxi Province.The uniaxial compressive strength test is carried out on the MTS815 Servo-controlled Rock Mechanical Test Sys-tem.We discuss the relationship between the velocity of P-wave and the coal intensity,and that between the dy-namic and static elastic parameters.Test results indicate that: uniaxial compressive strength of coal and the P-wave velocity show a good exponential relationship,uniaxial compressive strength increase with the P-wave velocity;the dynamic and static elastic modulus show a good linear relationship,and the dynamic elastic modulus is usually greater than the static elastic modulus;the static and dynamic Poisson’s ratio is positively correlated.
引文
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[2]李智武,刘树根,罗玉宏,等.川东北地区致密碎屑岩动静弹参数实验研究[J].石油实验地质,2006,28(3):286–295.
[3]单钰铭,刘维国.地层条件下岩石动静力学参数的试验研究[J].成都理工学院学报,2000,27(3):249–254.
[4]江进,孙进忠,乔艳红,等.太原晋阳西山大佛岩石动静力学参数的对比研究[J].岩石力学与工程学报,2007,26(增刊1):3452–3460.
[5]林英松,葛洪魁,王顺昌.岩石动静力学参数的试验研究[J].岩石力学与工程学报,1998,17(2):216–222.
[6]曾立新.白马松华地区岩石动静参数的变化规律及相互关系[J],钻采工艺,2001,24(2):22–24.
[7]葛洪魁,黄荣樽,庄锦江,等.三轴应力下饱和水砂岩动静态弹性参数的试验研究[J].石油大学学报(自然科学版),1994,18(3):41–47.
[8]程久龙,于师建,王谓明,等.岩体测试与探测[M].北京:地震出版社,2000:104–111.
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