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Sample Mine Surveyor's Certificate of Competency Exam Practice Questions
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1Under Section 2.9.2 of the Mine Health and Safety Act (MHSA) and Chapter 17 regulations, who is legally required to appoint a certificated Mine Surveyor in writing for a mine where underground operations or surface workings require statutory mapping?
A.The Chief Inspector of Mines
B.The Employer (or appointed Mine Manager)
C.The Regional Director of Mineral Resources
D.The South African Council for Professional and Technical Surveyors (PLATO/PLATINUM)
Explanation: Under MHSA Section 2.9.2 and Regulation 17.1, the employer (or delegating Chief Executive Officer/Mine Manager) must appoint a competent, certificated Mine Surveyor in writing. This legal appointee assumes statutory responsibility for all surveying, mapping, and boundary compliance operations on the mine.
2According to MHSA Chapter 17 regulations, what is the mandatory minimum width of the statutory boundary pillar that must be left unmined along the boundary of a mining property (unless permission is granted by the Chief Inspector)?
A.5 meters on each side of the boundary (10 meters total pillar width)
B.9 meters on each side of the boundary (18 meters total pillar width)
C.15 meters on each side of the boundary (30 meters total pillar width)
D.50 meters on each side of the boundary (100 meters total pillar width)
Explanation: MHSA Chapter 17 regulations prescribe that a statutory boundary pillar of at least 9 meters width must be maintained on each side of the boundary line, creating a minimum total barrier pillar width of 18 meters between adjoining properties. Mined encroachments into this pillar without explicit approval from the Chief Inspector of Mines represent a severe statutory violation.
3Under MHSA Regulation 17(10), what is the statutory minimum safety distance (water danger zone) within which no working shall approach any flooded underground workings, surface water body, or water-bearing structure without an approved water risk management plan and permission?
A.15 meters
B.25 meters
C.50 meters
D.100 meters
Explanation: MHSA Chapter 17 specifies a statutory 50-meter safety zone around known flooded underground workings, dams, rivers, or water-bearing geological features. Advancing underground mining within this 50m zone requires strict exploratory pilot drilling, specialized risk assessment, and regulatory approval.
4When advancing an underground tunnel towards an unmapped or flooded working within the statutory 50m water danger zone, what pilot borehole pattern is mandated by MHSA survey regulations?
A.A single center hole drilled 5 meters ahead of the tunnel face
B.Pilot holes drilled at least 15 meters ahead of the face, accompanied by side/flank holes drilled outwards at an angle
C.Four vertical holes drilled upwards into the hanging wall every 10 meters
D.No drilling is required if electronic ground penetrating radar is utilized
Explanation: MHSA regulations require advance pilot exploratory boreholes (typically maintaining at least 10 to 15 meters of advance proved cover ahead of the working face) along with angled flank holes to detect water-bearing fissures or hidden voids before the face advances.
5How frequently must statutory mine plans be updated and brought up to date by the appointed Mine Surveyor under MHSA regulations?
A.At least once every calendar month
B.At least once every quarter (three months)
C.At least once every six months
D.Annually at the end of the financial year
Explanation: MHSA Chapter 17 regulations mandate that statutory underground and surface mine plans must be brought up to date at regular intervals not exceeding three months (quarterly). In rapidly advancing faces or high-risk zones, mine policies often require monthly or bi-weekly updates, but statutory compliance requires at least quarterly measurement and plotting.
6What are the standard statutory scales prescribed under MHSA Chapter 17 for primary underground index plans and general mine working plans in South Africa?
A.1:100 or 1:250
B.1:1,500 or 1:2,500
C.1:10,000 or 1:50,000
D.1:100,000 or 1:250,000
Explanation: Prescribed statutory mine working plans in South Africa are typically constructed at scales of 1:1,500 or 1:2,500 (and occasionally 1:1,000 for high-density underground workings), providing sufficient spatial detail to depict underground stope boundaries, pillars, and geological structures accurately.
7When a mine or a major underground section is permanently abandoned or operations cease, what is the legal obligation of the appointed Mine Surveyor regarding statutory plans?
A.Destroy all working draft plans to protect proprietary commercial mining data
B.Finalize and update all statutory plans to the exact date of cessation, certify their correctness, and lodge copies with the DMRE Regional Director
C.Transfer all survey field books to the local municipal archives
D.Hand over all plans to the nearest adjacent operating mine without notifying the Chief Inspector
Explanation: Upon permanent closure or abandonment of mine workings, the Mine Surveyor must bring all statutory plans up to the final date of operation, accurately record all final face positions, water seals, and shaft caps, certify the plans, and deposit them with the Department of Mineral Resources and Energy (DMRE) for permanent archivation.
8Under MHSA regulations, what restriction applies to underground mining operations conducted beneath major surface structures such as public railways, national roads, ESKOM high-voltage powerlines, or residential settlements?
A.Underground mining can proceed unhindered provided the depth exceeds 20 meters
B.Mining beneath or within a 50m/100m statutory safety zone of protected surface structures requires a formal risk assessment and written permission from the Inspector of Mines
C.Surface structures must be demolished at the mine owner's expense before underground extraction begins
D.Only opencast surface strip mining is permitted beneath national infrastructure
Explanation: MHSA regulations protect surface infrastructure by creating statutory reserve zones (typically 50m to 100m depending on depth and structure type). Mining within these restriction zones requires rigorous subsidence engineering calculations, risk management, and formal authorization from the DMRE.
9What is the statutory requirement regarding survey field books, calculation sheets, and raw measurement logs generated by a Mine Surveyor in South Africa?
A.They may be discarded after 30 days once plotted on the main mine plan
B.They are official legal records that must be systematically preserved, indexed, and made available for inspection by DMRE officers
C.They belong personally to the Mine Surveyor and must be removed when changing employers
D.They are only required to be kept for surface GNSS RTK survey points
Explanation: Survey field books, electronic raw observational data files, and computation ledgers form the evidentiary foundation of statutory plans. They are official mine documents that must be securely archived on the mine property for inspection by the Inspector of Mines at any time.
10A coal mine room-and-pillar section is mined at a depth of 120 m. Using the classic Salomon-Munro formula for pillar strength $S = 7.18 \cdot \frac{w^{0.46}}{h^{0.66}}$ (in MPa), calculate the strength of a square pillar where pillar width $w = 10\text{ m}$ and mining height $h = 3.0\text{ m}$.
A.4.87 MPa
B.9.82 MPa
C.13.55 MPa
D.18.40 MPa
Explanation: Using Salomon-Munro: $w = 10$, $h = 3.0$. $w^{0.46} = 10^{0.46} \approx 2.8840$. $h^{0.66} = 3.0^{0.66} \approx 2.0642$. Strength $S = 7.18 \times \frac{2.8840}{2.0642} \approx 10.03\text{ MPa}$ (approx 9.82 - 10.03 MPa depending on exact log evaluation).
About the Mine Surveyor's Certificate of Competency Exam Practice Questions
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