摘要
运用建立的煤岩胀裂破坏微震观测试验系统,研究了煤岩试样在胀裂破坏过程中微震信号的特性规律。研究结果表明:煤样胀裂破坏过程中,微震信号的变化与载荷能够进行良好对应,基本呈正相关;煤样胀裂破坏过程中的微震信号是不连续的,阵发性的,但总体上呈群震型;岩样胀裂破坏过程微震阵发性明显,信号零星稀少,总体上呈前震-主震-后震型或主震-后震型;微震信号的变化规律体现了煤岩内部裂隙的发展发育过程,反映了煤岩的受载状态,可以利用微震信号的变化规律预测预报煤岩动力灾害的发生。
With the establishment of the micro-seismic observation and measurement test system for the coal and rock swelling and cracking failure, the paper studied the micro-seismic signal feature law of the coal and rock samples during the swelling and cracking procedure. The study results showed that during the coal and rock swelling and cracking procedure, the variation and stress of the micro-seismic signals could be the corresponding to each other and could be positively related to each other basically. During the coal and rock swelling and cracking procedure, the micro-seismic signals could be discontinuous and paroxysm. The micro-seismic signals would be a group seismic type generally. During the coal and rock swelling and cracking procedure, the micro-seismic would be paroxysm obviously and the signals would be scrappy and few. Generally there would be the seismic previous-main seismic-post seismic type signals or main seismic-seismic post type signals. The variation law of the seismic signal presented the development and growth procedure of the coal and rock inner fracture and reflected the loading status of the coal and rock. The variation of the micro-seismic signals could be applied to predict and forecast the coal and rock dynamic disasters to be occurred.
出处
《煤炭科学技术》
CAS
北大核心
2009年第8期32-35,共4页
Coal Science and Technology
基金
国家自然科学专项基金资助项目(50427401)
教育部新世纪优秀人才支持计划资助项目(NCET-06-0477)
国家高技术发展计划(863计划)资助项目(2006AA06Z119)
关键词
微震
胀裂
煤岩
micro-seismic
swelling and cracking
coal and rock
