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~~ <br />List of figures <br />1. Location of the property <br />2. Diagrammatic West-East section of tYetaceous strata <br />3. Section through minaible seams in the Harvey <br />Gap area <br />4. Develognent of the E seam <br />• 5. Roan-and-pillar mining methods <br />6. layout of pillars <br />7. Typical mining panel causing subsidence trough <br />8. Surface subsidence caused by an excavation in a <br />flat-bedded opal seam <br />9. Effect of seam dip on the angle of draw <br />10. Effect of seam inclination on limit angles <br />5 <br />• 11. Parameters used for subsidences prediction <br />