基于声发射的高松矿田白云岩破坏特征分析  

Analysis of Dolomite Failure Characteristics in Gaosong Ore field Based on Acoustic Emission

作　　者：倪春中[1] 张世涛[1] 刘春学[2] 李雨健[1] 

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南财经大学城市与环境学院,云南昆明650221

出　　处：《资源环境与工程》2014年第1期59-61,共3页Resources Environment & Engineering

基　　金：国家自然科学基金(40902058);云南省应用基础研究计划项目(2013FZ026);云南省教育厅科学研究基金项目(2011Y363)

摘　　要：在刚性试验机上,对个旧锡矿高松矿田白云岩进行单轴受压岩石破坏全过程声发射试验,研究岩石破坏全过程力学特征和声发射特征,在此基础上分析石灰岩的破坏机理。试验研究表明:白云岩在加载初期有声发射活动,为原有微裂隙闭合过程中挤压破坏产生;弹性阶段的中期,声发射事件比较稳定;后期和塑性阶段的前期声发射事件明显增加,此时原有裂纹扩展是造成岩石声发射活动和体积变化的主要原因。Acoustic emission is carried out dolomite which sampled from Gaosong ore field, Gejiu tin deposit through uni- axial compressive by rigid testing machine. Characteristics of the mechanical and acoustic emission in the whole rock failure process are analyzed and so the dolomite failure mechanism. The study showed that： there exits acoustic emission activity at the beginning of loading. This is due to the original micro-fissure extrusion destruction in closing process. In the mid-term of the elastic phase, acoustic emission events become stable and late plastic stage acoustic emission event significantly increases than before. The original crack growth is the main reason for rock acoustic emission activity and the change of the volume.

关 键 词：单轴压缩测试 高松矿田白云岩 破坏过程 声发射 

分 类 号：TU452[建筑科学—岩土工程]