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P ASSIGNMENT 5 - FRAGMENTATION SOLUTIONS 2023 UP(UNIVERSITY OF PRETORIA)
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P ASSIGNMENT 5 - FRAGMENTATION SOLUTIONS 2023 UP(UNIVERSITY OF PRETORIA)
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P003025-001-2023
ASSIGNMENT 5 -FRAGMENTATION
SOLUTIONS 2023
Unique number: *******
DUE DATE: 7 AUGUST 2023 at
16H00. FRAGMENTATION
PROGRAMME IN BLASTING
ENGINEERING
Name:_______________________________
Student No:__________________________
Page 1 of 14
, UNIVERSITY OF PRETORIA
PROGRAMME IN BLASTING ENGINEERING
MINING ENGINEERING DEPARTMENT AND ENTERPRISES AT UP
COURSE CODE: P003025-001-2023
ASSIGNMENT 5 - FRAGMENTATION
Assignment due date: 7 August 2023 at 16H00.
Submit assignments, in Word or PDF format on TurnitIn - ClickUp
The assignment is an individual attempt by the delegate to show his understanding of the
relevant module. Assignments should not be longer than 10 pages.
It is also expected of the delegate to submit a professional typed report.
Question 1: (40 Marks)
The table below shows the current method of blasting in a granite quarry. You want to provide
the customer with a new blasting pattern for Blasting-power 109, density 1.07 g/cc (cup
density), RBS 135, such that the fragmentation remains unchanged. Clearly show all the
assumptions made.
Calculate the design (Show all the steps)
Burden (m) 2.4
Spacing (m) 3.1
Hole diameter (mm) 122
Bench Height (m) 10.0
Sub-drill (m) 1.2
Charge length (m) 8.5
Explosive ANFO
Explosive density (g/cc) 0.89
Explosive REE 100
Explosive RBS 100
Page 2 of 14
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