黄金科学技术 ›› 2018, Vol. 26 ›› Issue (6): 819-825.doi: 10.11872/j.issn.1005-2518.2018.06.819
所属专题: 专题名称
• • 上一篇
Yongfei YE(),Yanan ZHANG,Shichao LI,Shirong CAO,Jianwen HAN,Xiaojun WANG*(
)
摘要:
胶结充填体是充填采矿法应用的关键部分,其稳定与否是充填采矿成功实施的基础和前提。实际采矿活动对充填体产生一种循环重复的加卸载扰动,通过研究循环加卸载作用下充填体损伤破坏过程的声发射特征,探求充填体的损伤演化机理,可为充填体声发射监测技术提供基础性依据。本研究利用RMT-150C电液伺服系统和PIC-2型USB数字多通道声发射仪对灰砂比为1∶4的4组试样进行多级加卸载试验,模拟充填体实际所处应力环境。通过对试验过程系统接收到的声发射信号分析处理后,发现了循环载荷下胶结充填体的损伤演化具有3个不同阶段特征;同时用经过声发射参数量化后的损伤值表征充填体的损伤,为充填体稳定性监测技术的建立提供数值依据。
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