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Diameter of Explosive using Burden Suggested in Konya Formula Calculator

Konya Formula:

\[ D_e = \frac{B}{3.15} \times \left(\frac{SG_r}{SG_e}\right)^{\frac{1}{3}} \]

in (±5%)
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1. What is the Konya Formula Calculator?

Definition: This calculator determines the optimal diameter of explosive needed based on the burden distance and specific gravities of rock and explosive.

Purpose: It helps blasting engineers and mining professionals optimize explosive charges for efficient rock fragmentation.

2. How Does the Calculator Work?

The calculator uses the Konya formula:

\[ D_e = \frac{B}{3.15} \times \left(\frac{SG_r}{SG_e}\right)^{\frac{1}{3}} \]

Where:

  • \( D_e \) — Diameter of explosive (inches)
  • \( B \) — Burden distance (inches)
  • \( SG_r \) — Specific gravity of rock
  • \( SG_e \) — Specific gravity of explosive

Explanation: The formula balances the explosive energy with rock properties to achieve optimal fragmentation.

3. Importance of Accurate Calculation

Details: Proper explosive diameter calculation ensures efficient rock breakage while minimizing flyrock and vibration.

4. Using the Calculator

Tips: Enter the burden distance in inches, specific gravity of rock (default 2.3), and specific gravity of explosive (default 1.9). All values must be > 0. Note: Results have ±5% tolerance.

5. Frequently Asked Questions (FAQ)

Q1: What is burden distance?
A: Burden is the perpendicular distance from the blast hole to the nearest free face of the rock.

Q2: Why is specific gravity important?
A: It determines how the explosive energy couples with the rock for efficient breakage.

Q3: What's a typical SG for common explosives?
A: ANFO: 0.8-0.9, Emulsions: 1.1-1.3, Dynamite: 1.3-1.6.

Q4: When would I adjust the values?
A: For different rock types (harder rock needs higher SG ratio) or explosive types.

Q5: Why the ±5% tolerance?
A: Field conditions vary due to rock heterogeneity, moisture, and other factors.

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