Register
Question 1
In the Salamon-Munro coal pillar strength formula S = 7.18 * (w^0.46 / h^0.66), what units must be used for pillar width (w), pillar height (h), and the resulting strength (S)?
Correct Answer:
w and h in meters (m), S in Megapascals (MPa)
Question 2
Calculate the Salamon-Munro pillar strength for a square coal pillar with width w = 16 m and mining height h = 4 m. (Use S = 7.18 * (w^0.46 / h^0.66)).
Correct Answer:
10.30 MPa
Question 3
Using Tributary Area Theory with an overburden gradient of 0.025 MPa/m, calculate the average vertical stress (load) on a square coal pillar at depth H = 80 m, with pillar width w = 12 m and bord width B = 6 m.
Correct Answer:
4.50 MPa
Question 4
A coal seam mined at depth H = 100 m uses bord width B = 6 m, pillar width w = 14 m, and mining height h = 3.5 m. Calculate the Safety Factor (SF = S / s) of the pillars.
Correct Answer:
2.07
Question 5
What is the areal extraction ratio e for a square bord and pillar panel where pillar width w = 18 m and bord width B = 6 m?
Correct Answer:
43.75%
Question 1
Exam overview

About this Exam

Prepare with the Certificate in Strata Control - Coal Exam Practice Questions - Certificate in Strata Control - Coal (South Africa) Exam practice quiz. This question bank includes 100 questions covering pillar, roof, coal, width, and bolt. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

More details

Additional Information

Certificate in Strata Control - Coal Exam Practice Questions - Certificate in Strata Control - Coal (South Africa) Exam

This practice set contains 100 questions from the matching question bank and focuses on pillar, roof, coal, width, and bolt. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

Quiz information

Frequently Asked Questions

The complete question count is available after full access is unlocked.
No fixed duration is currently configured for this quiz.
Question explanations are included where they are available in the quiz content, helping you review the reasoning after answering.
Yes. You can retake the practice test again as you continue studying during your available access period.
After your access is confirmed, you can continue into the complete practice exam from this quiz flow.
Unless explicitly stated otherwise, this page provides independent practice material for study and exam preparation and is not the official examination itself.
Keep studying

Related Questions

120-Hour TESOL Certificate Practice Test

0 min

307 Advanced Damage Control Practice Exam

0 min

340B Program Operations Certificate Practice Exam

0 min

Archer Safety Infection Control Practice Exam Guide

0 min

Certified in Risk and Information Systems Control (CRISC) Practice Test

0 min

CFA ESG Investing Certificate Practice Exam

0 min