Injured employee was walking the roadways prior to the start of his shift when a piece of draw rock approx. 26""x48""x1-3"" fell from between the roof bolts and struck the left top of his head and continued down the left side of his torso. He was airlifted to the ER and admitted to the ICU. ER Diagnosis: 4 Fractured vertebrae, small bleed on the brain and injuries to his left ribs.