Ready Reckoner for Cross-Checking Granite (Building Stone) Mineable Reserves in Mining Plans

This guide serves as a quick reference to evaluate whether reported mineable reserves of granite (building stone) in a mining plan align with theoretical values derived for different areas with varying length-to-breadth ratios. The considerations for theoretical values are based on the following assumptions:

• The land exhibits a gentle slope or is flat.
• The thickness of overburden is minimal or nonexistent.
• The land has a regular shape (square or rectangular).
• The depth of mining can extend down to a quarry floor with a minimum width of 10 meters.

Mineable reserves have been calculated using both the bench-wise cross-sectional method and the conventional reserve calculation method. Different Receognised Qualified Persons (RQPs) may use either of these methods, leading to variations in reported values.

Theoretical values provided in the table represent the maximum mineable reserves achievable for a specific area. Actual reserves may be less if the land is irregular in shape or has a significant slope, as increased slope generally correlates with reduced reserves. This table offers a convenient way to quickly assess whether RQP-reported values fall within the theoretical maximums. If reported values surpass the theoretical maximum, it is advisable to scrutinize the computation for potential errors.

Download Ready Reckoner Table (PDF)