气液复合加载下岩爆模拟试验研究  

Simulation test study on rock burst under gas-liquid composite loading

作　　者：董一丰 范俊奇 石晓燕 龚健[1] 余永强[1] DONG Yifeng;FAN Junqi;SHI Xiaoyan;GONG Jian;YU Yongqiang(Henan Polytechnic University,Jiaozuo 454000,China;Defense Engineering Institute,AMS,PLA,Luoyang 471023,China)

机构地区：[1]河南理工大学,河南焦作454000 [2]军事科学院国防工程研究院,河南洛阳471023

出　　处：《防护工程》2023年第3期9-16,共8页Protective Engineering

摘　　要：运用改进型气液复合加载装置,通过改变蓄能腔气压,成功再现了不同程度等级岩爆现象。通过压强监测、位移采集、碎片统计、高速录像和声发射采集等多方面对岩爆破坏特征开展研究,验证了改进后加载系统的密封性、重复性及可靠性。试验发现:在1 MPa蓄能腔气压作用下无岩爆破坏现象,在2、3、4 MPa蓄能腔气压作用下发生不同程度岩爆现象且岩爆均呈现静力孕育、动力突发和岩爆破坏等3个阶段。蓄能腔气压大小对岩爆烈度影响显著,蓄能腔气压越大岩爆抛掷现象越明显,抛掷破碎程度越高,抛掷距离越远,弹射动量越大。岩爆破坏前声发射迎来平静期,在岩爆破坏状态时振铃计数和能量非常活跃。By using the improved gas-liquid composite loading device and changing the air pressure of the energy storage chamber,various levels of rock burst phenomenon were successfully reproduced,and the sealing,repeatability and reliability of the improved loading system were verified through the study of rock burst damage char⁃acteristics by pressure monitoring,displacement collection,debris statistics,high-speed video and acoustic emission collection.It was found from the tests that there was no rock burst under the pressure of 1 MPa energy storage cham⁃ber,and rock burst occurred to varying degrees under the pressure of 2,3 and 4 MPa energy storage chambers,and the rock burst states were presented as static incubation,dynamic burst and rock burst failure phases.The pressure of the energy storage chamber has a significant impact on the rock burst intensity.The greater the pressure,the more significant the rock burst throwing phenomenon,meanwhile,the higher the degree of throwing fragmentation,the far⁃ther the throwing distance and the greater the ejection momentum.The acoustic emission ushered in a quiet period be⁃fore the rock burst failure,and ringing counts and energy were very active during rock burst failure.

关 键 词：气液复合 抛掷型岩爆 破坏现象 模拟试验 声发射 

分 类 号：TU45[建筑科学—岩土工程]