Assisting in rehabilitating a hoisting headframe at an underground salt mine.
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RESPEC evaluated the structural integrity of a hoisting headframe at an underground salt mine by comparing video-measured displacements of the headframe to the theoretical displacements based on structural analysis and the original steel dimensions. If corrosion and weathering had affected the steel dimensions enough to weaken the structure, deformations and displacements that are greater than expected would be measured.
The video-monitoring camera recorded the entire headframe but focused on the lateral and vertical displacements of the sheave axle. Lateral and vertical displacements of less than 1.5 millimeters were measured for the axle during several cycles of hoisting. The equipment setup, video recording, and on-site analysis of the displacements were made in less than 1 hour.
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