When working on a Continuous Miner, an employee had the top Rub-Rail next to the Scrubber swung out. Employee was raising the Scrubber cover with the hydraulic controls when the Scrubber Lid hit the Rub-Rail, causing it to swing. The Rub-Rail struck employee across the face. The struck-by injury resulted in a Laceration just below the left side of Nose that required 4-stitches.