单轴压缩下冲击倾向性煤样声发射特性的实验研究

英文篇名：Experiment of Acoustic Emission Characteristic of Coal Sample with Rock-bust Liability under Uniaxial Compression Condition
中文刊名：煤矿开采
英文刊名：Coal Mining Technology
作者：杨磊 ; 毛德兵
英文作者：YANG Lei1 ; 2 ; MAO De-bing1 ; 2(1.Coal Mining & Designing Branch ; China Coal Research Institute ; Beijing 100013 ; China ; 2.Coal Mining & Designing Department ; Tiandi Science & Technology Co. ; Ltd. ; Beijing 100013 ; China)
中文关键词：冲击倾向性 ; 声发射能率 ; b值 ; 前兆信息 ; 冲击地压
英文关键词：rock-burst liability ; acoustic emission energy ratio ; b value ; premonition information ; rock-burst
出版日期：2013-02-15
机构：煤炭科学研究总院开采设计研究分院;天地科技股份有限公司开采设计事业部;
年：2013
期：01
出版单位：煤矿开采

摘要

利用岩石力学试验机和PAC声发射信号采集系统对冲击倾向性煤样进行了单轴压缩声发射测试,研究了其变形破坏过程中的声发射能率及b值的动态变化特征。试验结果表明,冲击倾向性煤样和无冲击倾向性煤样的声发射能率活跃点分别为峰值应力的90%和50%,声发射能率特征体现了冲击倾向性的本质,煤样破坏前声发射b值可以作为冲击倾向性煤样失稳破坏的前兆信息。
Applying rock mechanics testing machine and PAC acoustic emission collection system to making acoustic emission test of coal samples with bursting liability under uniaxial compress condition,dynamic variation of acoustic emission energy ratio and b value during deformation and damage period was researched.Test results showed that acoustic emission energy ratio active point of coal sample with burst liability was 90% of peak stress and that of sample without burst liability was 50%.Acoustic emission energy ratio reflected burst liability's essence,so acoustic emission b value could be treated as premonition information of coal sample damage.

引文

[1]王恩元,何学秋,李忠辉,等.煤岩电磁辐射技术及其应用[M].北京:科学出版社,2009.
    [2]OBERT L,DUVALL W I.Use of sub audible noises for predictionof rockbursts II—report of investigation[R].Denver:U.S.Bureau of Mines,1941.
    [3]李庶林,尹贤刚,王泳嘉,等.单轴受压岩石破坏全过程声发射特征研究[J].岩石力学与工程学报,2004,23(15):2499-2503.
    [4]王恩元,何学秋,刘贞堂,等.煤体破裂声发射的频谱特征研究[J].煤炭学报,2004,29(3):289-292.
    [5]杨永杰,陈绍杰,韩国栋.煤样压缩破坏过程的声发射试验[J].煤炭学报,2006,31(5):362-365.
    [6]左建平,裴建良,刘建锋,等.煤岩体破裂过程中声发射行为及时空演化机制[J].岩石力学与工程学报,2011,30(8):1564-1570.
    [7]宁超,余锋,景丽岗.单轴压缩条件下冲击煤岩声发射特性实验研究[J].煤矿开采,2011,16(1):97-100.
    [8]赵毅鑫,姜耀东,韩志茹.冲击倾向性煤体破坏过程声热效应的试验研究[J].岩石力学与工程学报,2007,26(5):965-971.
    [9]李元辉,刘建坡,赵兴东,等.岩石破裂过程中的声发射b值及分形特征研究[J].岩土力学,2009,30(9):2559-2563,2574.
    [10]赵得秀.地震探源与地震预报[M].西安:西北工业大学出版社,2007.