讲解 MINE3003 & MINE5003 ROCK EXCAVATION SEMESTER 2, 2025辅导 C/C++语言

Individual Assignment

ROCK EXCAVATION (TECHNOLOGY)

MINE3003 & MINE5003

SEMESTER 2, 2025

Underground Stope Blast Design

For the stope below (20*30*25 m), provide:

1) Drilling pattern design (show the spacing on the pattern, include a table with hole IDs and the determined length of each hole)

2) Charging pattern design (show details on the pattern, include a table to summarise charge length and stemming length, determine volume of rock per ring, amount of explosive per ring, ring powder factor, and mean toe powder factor & location of primer(s))

3) Delay pattern design (maximum time to burn the explosive in a hole (ms), minimum time to burn explosive in a hole (ms), and inter-hole delay (ms))

Note: For a particular parameter, if multiple calculation methods are available, use all of them and compute the average.

Note: For each item above, explain the design process and required considerations.

Figure 1. Section view of a stope

Conditions:

1) Drilling condition:

-     Production blast hole drilling diameter: 89 mm (the most common diameter)

-    Drilling with Simba M6 - COP 3060

2) Rock Mass condition: same as Table 1.

3) Drilling and blasting design conditions:

-    Toe spacing and burden ratio of 1.4 is generally applied.

-    The practical damage zone should be used for stope blasting design.

-     For a parameter, if multiple methods exist, perform calculations for all and specify which value you have chosen and why.

Table 1. Basic material properties

Table 2. Explosive characteristics

Assignment submission guidelines

1.   The assignment is designed for manual design but is free to use any blast design software.

2.   The assignment must be submitted via Turnitin only!

3.   Free-format

4.   Use APA6 or APA7 reference style.

5.   Provide figures of the underground blast design plan, including charge and tie-up plan and other requested information.

6.   Structure of the report:

•    Executive summary - should be less than 1 page

•    Body— consider subsections for different components calculations

o Underground blast design

•    Conclusion (less than 1 page)

•    References

7.   Cautions:

• Zero-tolerate on copying. A submission with any suspicion of copying will be  assigned  either  a  0  mark  or  referred  to  the  Academic  Misconduct Committee for further investigation.

•    The  report  must  be  submitted through  Turnitin only.  Do  not send your submission by email, as it will not be assessed.

•    The assessment criteria table will be used for the assessment feedback. Detailed feedback will be provided on request.

Marking Criteria: