煤岩组合体冲击破坏的声发射及微震效应规律试验研究  

Experimental research on rules of acoustic emission and microseismic effects of burst failure of compound coal-rock samples

作　　者：王晓南[1,2] 陆菜平[1,2,3] 薛俊华[4] 余国锋[4] 罗勇[4] 刘辉[1,2] 张军伟[1,2] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]中国矿业大学深部煤炭资源开采教育部重点实验室,江苏徐州221116 [3]宾夕法尼亚州立大学地球与矿业科学学院,美国费城16801 [4]淮南矿业集团深部煤炭开采与环境保护国家重点实验室,安徽淮南232001

出　　处：《岩土力学》2013年第9期2569-2575,共7页Rock and Soil Mechanics

基　　金：教育部新世纪优秀人才支持计划(No.NCET-10-0769);国家重点基础研究发展规划(973)资助项目(No.2012CB724206);江苏高校优势学科建设工程资助项目(No.SZBF2011-6-B35)

摘　　要：研究由顶板-煤体-底板所构成的煤岩组合体变形破裂声发射和微震的规律,对于研究冲击机制具有重要意义。利用SANS材料试验系统、Disp-24声发射监测系统和TDS-6微震信号采集系统,对单轴受压的不同煤岩组合试样进行声发射和微震试验,得到不同组合试样在受载破坏过程中的声发射和微震信号。试验研究表明:组合试样发生冲击破坏时的声发射和微震信号的强度随试样的单轴抗压强度、冲击倾向性以及其顶板与煤层的高度比值的增加而增强;微震信号的振幅可以反映组合煤岩体的冲击倾向性强弱;微震频谱幅度的分布随着抗压强度和冲击能指数的上升而向高频移动。上述结论对指导现场冲击矿压的监测预警以及评价有着重要意义。The acoustic emission （AE） and microseismic （MS） rules in the process of deformation and failure of samples combined with roof, coal and floor are very important to reveal the dynamic mechanism of rockburst. The compound samples were tested by SANS material testing system under uniaxial compression condition. During the whole test process, the AE and MS events were monitored by DISP-24 AE system and TDS-6 MS collection system. The results showed that the larger the uniaxial compressive strength, rockburst tendency and the ratio of roof height to coal height of compound samples are, the stronger the intensity of AE and MS signal is. The amplitude of MS signal can reflect the rockburst tendency of compound samples. The spectrum distribution of MS signal in the high frequency band will increase along with the increasing compressive strength and impact energy index of samples. The above conclusions are of great significance to evaluate, monitor and warn rockburst in coal mines.

关 键 词：采矿工程 煤岩组合 声发射 微震 频谱 

分 类 号：TD315[矿业工程—矿井建设]