Shaft vibration guide

In the case studies presented in this work, a typical conveyance rope guide system in a vertical shaft arrangement was studied (Figure 1). In a rope guide system, the horizontal motion of the conveyance is critical as it may cause collision between conveyances or with the shaft wall. Various factors have been evaluated for the influences on the horizontal motion of conveyance in a rope guide system, including the air pressure, stiffness of rope guide, Coriolis effect, rope vibration, etc. 

Field measurements of clearance between the east-west skips and the pressure over the surfaces of the east skip during the travels were carried out for a production shaft of a potash mine in August 2010. The acceleration, velocity and displacement of the east skip were captured with a three-dimensional motion sensor. The measured displacements of the skips at current 3300 fpm (16.76 m/s) velocity were the resultant movements under the combined influences of airflow, Coriolis effect and guide rope vibration. 

The process when the two skips approach, meet and pass each other at the mid-shaft was modelled at progressive positions. Skip displacements due to Coriofls effect, air pressure, guide rope vibration and combined influence are presented in Figure 6. In summary for the motion study, based on the predictions for the proposed skip length and velocity, no collision would... 

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