Selection and Test of Road-side Filling Material in Gob-side Entry Retaining

Compressive strength test and dynamic monitoring of whole process-acoustic emission of speciments compression-shear failure were implemented with cylindrical specimen,pure cement-mortar specimen and different refuse-rate cube specimens.The results showed that changes of specimens strength reducuing with concentration increase of water-cement,strength of specimens with refuse are more than cement-mortar.Frequency and energy-ratio of acoustic emission were related with specimens load.Acoustic emission frequency and energy-ratio of specimens increasing gradually with the increasing of stress.Acoustic emission frequency and energy-ratio of specimens were decreased gradually with the decreasing of stress after peak.