Siberian authorities barred a weekend rally by miners upset about an accident that killed 90 people earlier this month, RIA-Novosti reported.
Novokuznetsk officials said the location where the Mezhdurechensk miners had asked to rally Saturday was reserved for a sports competition for social workers.
Several dozen miners blocked Novokuznetsk's central street on Saturday anyway.
On May 14, OMON riot police were sent to disperse dozens of coal miners and their families who had blocked a Siberian railway line in the town of Mezhdurechensk in a protest over the May 8-9 explosions at the Raspadskaya mine.