【摘要】 为探讨复合岩土材料的声发射特性,对石粉、石粉+分口石两种人工复合材料进行了实验研究。研究表明,石粉和石粉+分口石人工复合材料分别呈强塑性、弱塑性破坏特征,其单向受压加载初期即有声发射大事件产生,破坏荷载的70%~80%时声发射大事件数急剧降低甚至消失,呈现明显的平静期,之后声发射大事件数迅速增多直至破坏,塑性人工复合材料的声发射事件主要来自颗粒间的摩擦和粘结失效能,声发射大事件数总体偏少,约为岩石类材料的1/10。更多还原

【Abstract】 To study the acoustic emission properties of composites from Rock and Soil,two kinds of composites,powered rock and powered rock and small stones,are tested under uniaxial compression and they are characterized with strong plasticity and feeble plasticity respectively.The results showthat:there will happenAE large events atthe beginning of loading,the number of AE large events obviously decreases or disappears during the loading process of 70~ 80 percent of sample peak load,named as inactive period,after that the number of AE large events increases till ruptured.AE events of plastic composites mainly come from the friction of small rocks and bonding failure and the total numberofAE large events is small,about one-tenth of samples of composites from rock and soil.更多还原