TY -的A2 -阴,大为AU -史,Caixing盟——吴,翼城县盟——郭,李洁盟——赵,越盟,徐离北京PY - 2022 DA - 2022/02/21 TI -研究回填单轴抗压下声发射特征和源位置SP - 2706897六世- 2022 AB -本研究探讨了尾矿的声发射(AE)特点回填(施)单轴压缩载荷作用下。分类从武山铜矿尾矿材料来源被用来准备圆柱形所有样本。本研究使用了一个SLB10装料机的单轴抗压测试。PCI-2声波系统连接到所有标本在加载测量声发射。总的来说,回填试样的单轴抗压强度(UCS)是3.58 MPa。所有样品的失效模式可分为五个阶段,包括孔隙微裂缝压实阶段(举行),线性弹性变形阶段(b阶段),产生变形阶段(c阶段),破坏阶段(d阶段)和残余阶段(stage-e)。在每个阶段,声发射特征参数如达到每秒(HPS),累计数量的影响,能源率和总能量变化很多,这表明AE参数反映了所有样本的内部故障演化。在上演一场,没有明显的AE行为测量。在b阶段,试样的宏观变化不明显,而AE参数稳定,不断增加。在c阶段,AE的数量急剧增长,影响能源大幅加息,和突然的变化。 The cumulative number of AE impacts is 31.3% in stage-d, and the cumulative energy rate is 49.4%, which is the most active stage of acoustic emission activities. The specimen has prominent crack propagation and bifurcation phenomena. In stage-d, the CTB sample was destroyed entirely, and the characteristic parameters of acoustic emission were significantly reduced. Finally, multiple regression analysis methods are introduced into the time difference positioning method to locate the AE source. The positioning results show that the technique can better invert the close relationship between the damage and destruction of the CTB and the generation and penetration of the internal cracks and describe it to a certain extent. The failure surface of the filler specimen has an excellent guiding value for the analysis of the interior failure characteristics of the sample. SN - 1687-8086 UR - https://doi.org/10.1155/2022/2706897 DO - 10.1155/2022/2706897 JF - Advances in Civil Engineering PB - Hindawi KW - ER -