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对云南南坡铜矿两种砂岩进行了单轴压缩试验,并利用SDAES型数字声发射仪测试了加载过程中的声发射活动。结果表明,岩石的变形与声发射活动存在较好的对应性;声发射活动也受岩石各向异性的影响。第一组砂岩各向异性较为显著,试样垂直层理加载时,弹性模量明显小于平行层理加载时的弹性模量,强度明显大于平行层理加载时的强度,声发射也较平行层理加载时更为活跃。第二组砂岩试样的试验结果与此类似,但其岩石各向异性不显著,垂直层理加载和平行层理加载时岩石的弹性模量、强度及声发射相差均相对较小。
Uniaxial compression tests were conducted on two sandstones at the Nanpo copper deposit in Yunnan Province. Acoustic emission activities during loading were tested using a SDAES digital acoustic emission apparatus. The results show that there is a good correspondence between rock deformation and acoustic emission. Acoustic emission is also affected by rock anisotropy. The anisotropy of the sandstone in the first group is more significant. The elastic modulus of the specimen is obviously lower than that of the parallel bedding when the vertical bedding is loaded. The strength is obviously higher than that of the parallel layered bedding. When the load is more active. The results of the second group of sandstone samples are similar, but their rock anisotropy is insignificant. The elastic modulus, strength and acoustic emission of the rock are relatively small when the vertical bedding and the parallel bedding are loaded.