The charges against Hamza Babou include assault, uttering threats and assault with a weapon, with his lawyer saying the latter charge is related to an aerosol can that contained so-called "silly string."
Babou, 23, was not released Thursday because he is scheduled to appear in court in Montreal on Friday on two additional charges in a separate case.
He was arrested April 15 amid protests at the Universite du Quebec a Montreal against an injunction that prevented students from disrupting classes.
He was denied bail by a municipal judge two days later but a Quebec Superior Court justice overturned that ruling, saying the lower-court judge erred in law.
A prosecutor said Wednesday that further charges would be laid against Babou.