EMPLOYEE WAS PULLING ON THE TRAILING CABLE FOR AROOF BOLTING MACHINE ATTEMPTING TO KEEP THE CABLE FROM BECOMING TANGLED WITH ANOTHER CABLE. ANOTHER EMPLOYEE WAS PULLING ON THE CABLE FROM THE O THER END AND WHEN SLACK CAME INTO THE CABLE HE TWISTED HIS BACK. THIS INJURY HAS NOW BEEN DIAGNOSED AS A BULGING DISC IN THE L3, L4 AREA OF HIS BACK.