Sharepoint 2010 Restore a site collection backup

Hı,

If you d like to restore a site collection you should open the PowerShell as admin and type the following command:


Restore-SPSite -Identity "http://yoururl" -Path "C:\SiteCollectionBackups\backup.bak" -Force


Source:
http://sharepointciyiz.biz/post/2011/07/08/SharePoint-2010-Site-Collection-Backup-and-Restore.aspx