Diameter of Borehole using Burden Calculator

Diameter of Borehole Formula:

\[ D_h = \frac{B^2}{L} \]

Diameter of Borehole (D_h): m

1. What is Diameter of Borehole using Burden?

Definition: This calculator estimates the diameter of a borehole based on the burden (distance to free face) and length of the borehole.

Purpose: It helps in blast design by determining the appropriate borehole diameter for given blast parameters.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ D_h = \frac{B^2}{L} \]

Where:

\( D_h \) — Diameter of borehole (meters)
\( B \) — Burden (distance to nearest free face in meters)
\( L \) — Length of borehole (meters)

Explanation: The square of the burden is divided by the borehole length to determine the optimal borehole diameter.

3. Importance of Borehole Diameter Calculation

Details: Proper borehole diameter estimation ensures efficient explosive energy distribution, optimal fragmentation, and safety in blasting operations.

4. Using the Calculator

Tips: Enter the burden and borehole length in meters. Both values must be > 0. Results include ±5% tolerance.

5. Frequently Asked Questions (FAQ)

Q1: What is burden in blasting terms?
A: Burden is the distance from the blast hole to the nearest perpendicular free face.

Q2: Why is borehole diameter important?
A: It affects explosive distribution, fragmentation size, and overall blast efficiency.

Q3: What's the ±5% tolerance for?
A: It accounts for variations in rock properties and practical field conditions.

Q4: How does borehole length affect diameter?
A: Longer boreholes typically require larger diameters to maintain proper explosive distribution.

Q5: Can this formula be used for all rock types?
A: It provides a general estimate but may need adjustment for very hard or soft rock formations.