Memory effect of AE in gas sorption-desorption cycles of coal
Acoustic emission signals during gas sorption-desorption cycles are tested under different gas pressures, and the characteristics of acoustic emission generated in coal during gas sorption-desorption processes is analyzed.The experimental results show that acoustic emission signals generated in coal during the gas adsorption process gradually attenuate with the increase of adsorption time, and the process is not continuous but paroxysmal.For the same coal sample, during cycles of sorption-desorption, acoustic emission signals generated during gas adsorption process in coal have memory effect on the maximum gas pressure in earlier stage, that is, when the gas adsorption pressure is lower than the maximum adsorption pressure in earlier stage, both the energy and impulse of acoustic emission are weak;on the contrary, if the gas adsorption pressure exceeds the maximum adsorption pressure in earlier stage, both the energy and impulse of acoustic emission are strong.
sorption-desorption gas acoustic emission cycle memory effect
MA Yan-kun LIU Ze-gong WANG En-yuan
Key Laboratory of Safety and High-efficiency Coal Mining ,Ministry of Education, Anhui University of Key Laboratory of Safety and High-efficiency Coal Mining ,Ministry of Education, Anhui University of School of Safety Engineering, China University of Mining & Technology , Xuzhou 221008, China
国际会议
International Mining Conference 2014(2014国际采矿论坛)
安徽淮南
英文
292-296
2014-09-19（万方平台首次上网日期，不代表论文的发表时间）