The mine has been suspended since 11 September following a mudslide at the underground mine, which claimed the lives of three contractor employees.
The company then reported on 22 September that Alis residents had blocked the main access road to the mine.
"Efforts to ensure critical safety and maintenance have been ongoing at the mine throughout the blockade," Sierra said on 28 September.
"Accordingly, safety inspections and reviews are underway to support a safe and progressive restart to the operations at Yauricocha Mine," the company said.
"Sierra Metals will continue to collaborate with the host communities in its area of influence, in order to promote their development, while supporting long-term, stable operations," it added.
Production and financial guidance for Yauricocha was suspended on 22 September. In August, Sierra lifted Yauricocha's production guidance from 45,000-49,000 copper equivalent pounds to 49,000-53,000 CuEq lbs. All in sustaining costs guidance, at the time, were lifted from US$2.90-$3.10 to $3.10-$3.30.
Sierra's share price rose by 13% day on day to C$0.72 (US$0.53) on 28 September, giving the company a market capitalisation of C$118.04 million.