EMPLOYEE SIAD HE WAS ROCK DUSTING BY HAND NEAR SS# 85 WHICH IS ABOUT 1100' DEEP ON #1 BELTLINE. HE SAID HE PICKED UP SOME DRAW ROCK WHICH LAYING ON BOTTOM, WAS TOSSING IT ON THE BELT WHEN HE T WISTED HIS BACK AND SHOULDER CAUSING PAIN IN HISSHOULDER, BACK, AND LEGS. HE WORKED THURSDAY AND PART OF FRIDAY AFTERWARDS.