An investigation is underway into how a mine worker crushed his arm at the Broadmeadow underground coal mine near Moranbah in central Queensland.
On Sunday night, work colleagues noticed the man had not returned underground after going to collect equipment.
A search discovered he had trapped his left arm between a cable reel and the cable reeler.
Paramedics freed him and he is in a stable condition in the Mackay Base Hospital.
State Government mines inspectors are investigating the incident.