组合煤岩冲击破坏电磁辐射规律研究
首发时间:2005-04-30
摘要:大量理论研究和物理实验已经证实煤岩变形破裂过程中会产生宽频带的电磁辐射信号,因此研究坚硬顶板—煤体—底板所构成的组合煤岩变形破裂电磁辐射规律对于预测预报煤岩动力灾害具有非常重要的意义。采用MTS伺服加载以及Disp-24声电测试系统对组合煤岩变形破裂所产生的电磁辐射及声发射信号进行了测定,试验和测试结果表明,试样发生冲击破坏之前,电磁辐射强度呈小幅度上升波动,冲击破坏前兆会产生突变;而声发射信号计数率在试样冲击破坏时突然急剧增加并达到最大值,随后产生突降。依此规律,可以对冲击矿压的危险性进行评价及预测预报。
For information in English, please click here
Research on Electromagnetic Emission Rules of Composed Coal-Rock Burst Failure
Abstract:It is known that wide frequent electromagnetic emission (EME) signals can be produced in the process of deformation and failure of coal and rock by many theoretical researches and physical experiments. So, the EME rules of deformation and failure of coal and rock body composed of hard roof, coal body and floor are significant important to predict and forecast coal and rock dynamic calamity. The EME and acoustic emissions (AE) phenomenon in the rock burst process was studied using the Disp-24 acoustic-electromagnetic system and MTS loading system in the laboratory. The results show that the intensity of EME signals rises up slowly before burst failure but increases suddenly when burst failure occurs. The counts of AE signals increases suddenly to maximum value with the break up, after that, suddenly reduce .So the danger of rock burst can be evaluated and forecasted by the rules.
Keywords: composed coal and rock, rock burst failure, electromagnetic emission, rules
论文图表:
引用
No.1974611114822766****
同行评议
共计0人参与
勘误表
组合煤岩冲击破坏电磁辐射规律研究
评论
全部评论0/1000