煤体破裂声发射的频谱特征研究  

Study on frequency spectrum characteristics of acoustic emission in coal or rock deformation and fracture

作　　者：王恩元[1] 何学秋[1] 刘贞堂[1] 李忠辉[1] 

机构地区：[1]中国矿业大学能源科学与工程学院,江苏徐州221008

出　　处：《煤炭学报》2004年第3期289-292,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50204010);国家杰出青年基金资助项目(59925411);国家自然科学基金重点资助项目(50134040);江苏省自然科学基金资助项目(BK2001075)

摘　　要：对受载煤体声发射的频谱特性及变化规律进行了测试及研究分析,结果表明,煤体受载破裂时,其声发射信号的频谱不是一层不变的,而是随载荷及变形破裂过程而发生变化,基本上是随着载荷的增大及变形破裂过程的增强,声发射信号增强,主频带增高.煤体声发射的频谱特征变化与煤体变形破裂过程密切相关.Research and analysis were carried out on acoustic emission frequency spectrum characteristic and variety law of loaded coal or rock.The result shows that acoustic emission frequency spectrum is various during deformation and fracture of loaded coal or rock, and changes along with load and deformation and fracture process.The larger the load and stronger the deformation and fracture is,the higher the frequency zone of acoustic signal is. The change of the frequency spectrum characteristics of acoustic emission in coal or rock is in close relationship with the deformation and fracture process of coal and rock.

关 键 词：煤体 声发射 频谱 

分 类 号：TD326[矿业工程—矿井建设] TD315