Weight Strength of Explosive using Burden Suggested in Langefors' Formula Calculator

Formula Used:

\[ s = \left(\frac{33 \times BL}{db}\right)^2 \times \left(\frac{EV \times c \times Df}{Dp}\right) \]

Burden in Langefors' Formula (BL):

Diameter of Drill Bit (db):

Ratio of Spacing to Burden (EV):

Rock Constant (c):

Degree of Fraction (Df):

Degree of Packing (Dp):

Weight Strength of Explosive (s):

1. What is Weight Strength of Explosive using Burden Suggested in Langefors' Formula?

Definition: This calculator determines the weight strength of explosive based on Langefors' formula parameters.

Purpose: It helps in blasting operations to calculate the efficient rock fragmentation by considering various geological and operational factors.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ s = \left(\frac{33 \times BL}{db}\right)^2 \times \left(\frac{EV \times c \times Df}{Dp}\right) \]

Where:

\( s \) — Weight Strength of Explosive
\( BL \) — Burden in Langefors' Formula
\( db \) — Diameter of Drill Bit
\( EV \) — Ratio of Spacing to Burden
\( c \) — Rock Constant
\( Df \) — Degree of Fraction
\( Dp \) — Degree of Packing

Explanation: The formula calculates the explosive strength by considering the burden-diameter relationship and various rock and explosive characteristics.

3. Importance of Weight Strength Calculation

Details: Proper calculation ensures efficient rock fragmentation, safety in blasting operations, and optimal use of explosives.

4. Using the Calculator

Tips: Enter all required parameters. All values must be > 0. The ±5% indicates the acceptable margin of error for each parameter.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the 33 factor in the formula?
A: The factor 33 is an empirical constant in Langefors' formula that relates burden to drill hole diameter.

Q2: How do I determine the rock constant?
A: The rock constant depends on the specific rock type and can be found in geological references or through testing.

Q3: What does the degree of packing represent?
A: It represents the loading weight per unit of nominal volume of the explosive.

Q4: Why is there a ±5% margin indicated?
A: This accounts for typical measurement variations and uncertainties in field conditions.

Q5: How accurate is this calculation for real-world applications?
A: While theoretically sound, field conditions may require adjustments based on specific site characteristics.