Employee was assisting 2 others in rotating the drums of the CM when they felt pain in the lower back/hip. EE refused 1st aid, waited for a short time but then exited the mine to recuperate. EE traveled home but on 2/10/18 at 4:45 pm stated they were going to RGH ER to be checked. After examination, EE was give time away until 02/16/18 or sees a PCP. EE remains off work.