摘要
对云南金满铜矿的灰色和紫色两种板岩进行单轴压缩试验。试验结果表明:两种板岩都具有明显的各向异性。灰色板岩在平行层理加载下的抗压强度、平均弹性模量和平均泊松比与垂直层理加载的比值分别为:0.621,.668,.68;紫色板岩的比值为1.63,8.383,4.64。当体积应变εv<0和泊松比μ>0.5时就能反映出岩石在加载过程中产生了扩容现象。在平行层理加载下的体积应变在较低的应力(破坏载荷的5%～20%)处就产生了明显的扩容,而在垂直层理加载下的体积应变临近破坏时才出现扩容现象。
Uniaxial compressive tests were carried out with two types of slate samples from Jinman copper mine,Yunnan province.Experiment results demonstrated that both rocks had obvious anisotropy.Values of compressive strength,average elastic modulus and the average Poisson＇s ratio of the grey slate subjected to loading parallel to bedding stratum corresponding to values subjected to loading perpendicular to bedding were 0.62,1.66 and 8.68 respectively.Which of them in purple slate were 1.63,8.38 and 34.64 respectively.Dilation phenomenon of the slate appeared during the loading process when volume strain was less than 0 or Poisson＇s ratio is larger than 0.5.Dilation appeared significantly at lower stress in slate subjected to loading parallel to bedding,while dilation occur at stress near to failure in slate subjected to loading perpendicular to bedding.
出处
《有色金属（矿山部分）》
2011年第3期62-65,共4页
NONFERROUS METALS(Mining Section）
关键词
各向异性
单轴压缩
体积应变
弹性模量
泊松比
扩容
anisotropy
uniaxial compression
volume strain
elastic modulus
Poisson＇s ratio
dilation
