Mechanic was standing on a ladder leaning on a tire wielding. When he shifted his weight on the ladder he slipped and fell against the tire sliding down the tire on his left side. The mechanic was standing on the second step of the ladder.
Miner does not know exactly how the injury happened; he stepped off his bolter to load the carousal with bolts. Said he stepped off the bolter took 3-4 steps when he felt the pain in his back at the left shoulder. When questioned, the mine stated he did not twist or trip. He was not lifting anything at the time.
Miner removing a reamer bit from the cubex; had his hand on the bit reached up to the controls to release the bit. Pulled the wrong lever and the brakeout tool slid forward, instead of the bit being released.