In mineral exploration, which geophysical method is most appropriate for locating massive sulfide deposits (such as chalcopyrite or galena) due to their high electrical conductivity and chargeability?
Mining Engineering 1
Question · Medium
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During geochemical sampling, what is the 'anomaly threshold' defined as?
Chapter 1: Surface Mining Methods & Pit Optimization
1.1 Surface Mining Unit Operations & Method Selection
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Which drilling method provides the most reliable geological and structural information, including core samples for rock quality designation (RQD) and assaying, in hard rock formations?
Question · Easy
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Which of the following describes the 'nugget effect' in geostatistical ore reserve estimation?
Question · Hard
Under the PMRC (Philippine Mineral Reporting Code), what is the key difference between a Mineral Resource and an Ore Reserve?
In trenching and channel sampling, what is the primary rule for orientation of the channel relative to the mineralized structure?
1.2 Bench Geometry, Slope Stability & Geotechnical Pit Design
In open-pit mine planning, what does the Lerchs-Grossmann (LG) algorithm mathematically optimize?
In underground mine development, what is a vertical or inclined excavation driven from a lower level to an upper level called?
What is the primary function of a shaft collar in shaft sinking operations?
Which term refers to the ratio of waste volume to ore weight in open-pit mining?
1.3 Cut-Off Grade Optimization & Lerchs-Grossmann Pit Limits
When designing open-pit haul roads, what is the generally accepted maximum gradient to ensure safe and efficient haulage by mechanical-drive trucks?
Which mine development sequence is characterized by driving a horizontal entrance from a hillside to access a shallow horizontal coal seam?
Which underground mining method relies completely on the natural caving characteristics of the ore and capping rock under gravity, making it the lowest-cost underground method for large, low-grade deposits?
Which of the following is a selective underground mining method that provides the highest recovery and minimal dilution, but requires backfilling of stopes with tailings or cement as ore is extracted?
Chapter 2: Underground Mining Methods & Strata Control
2.1 Underground Mining Method Classification & Selection
In surface mining, which method is typically used to extract thin, flat, laterally extensive coal seams under relatively shallow soil cover?
What is the primary purpose of 'sublevel caving' as an underground mining method?
Which mining method is classified as an aqueous extraction method, utilizing high-pressure water monitors to wash unconsolidated placer minerals into sluice boxes?
What is the primary operational advantage of 'Longwall Mining' in underground coal extraction?
2.2 Rock Mechanics, Stress Analysis & Strata Control
According to Atkinson's Equation for mine ventilation friction loss (H_f = K * C * L * V^2 / A), which parameter has the most significant exponential effect on the pressure drop (H_f) in a mine airway?
What is the primary hazard associated with 'Black Damp' in underground mines?
Under standard mine safety regulations, what is the maximum allowable threshold limit value (TLV) for Carbon Monoxide (CO) exposure during an 8-hour shift?
Which ventilation device is used to block air currents completely along an underground drift while still allowing haulage and personnel passage?
2.3 Underground Ground Support Systems & Excavation Design
What is the critical range of methane gas concentration in air that forms an explosive mixture (firedamp)?
What is the primary cause of a 'dust explosion' in underground coal mines, and how is it mitigated?
In rock mass classification, Deere's Rock Quality Designation (RQD) is calculated as the percentage of core recovery consisting of intact core pieces longer than:
Under Bieniawski's Rock Mass Rating (RMR) system, which parameters are evaluated to determine the final geomechanical rating?
Chapter 3: Materials Handling, Equipment & Mine Economics
3.1 Drilling, Blasting & Explosives Engineering
In slope stability analysis, what type of slope failure is characterized by movement along two intersecting geological discontinuities, creating a tetrahedral block that slides out of the face?
What is the primary function of a split-set stabilizer in underground rock bolting?
Which of the following describes the Mohr-Coulomb failure criterion in rock mechanics?
What is the primary chemical mechanism responsible for Acid Mine Drainage (AMD) in mining operations?
3.2 Mine Loading, Haulage & Materials Handling Systems
Under standard mine environmental management, what is the function of a 'siltation pond' or settling basin?
In Philippine mining regulations, what is the required mechanism for securing funds to cover the cost of final mine rehabilitation and decommissioning after mine closure?
Which tailing storage facility (TSF) dam construction method is most susceptible to seismic liquefaction, leading to failures in active earthquake zones like the Philippines?
What is the primary objective of progressive rehabilitation in mining?
3.3 Mine Capital (CAPEX), Operating Costs (OPEX) & Financial Evaluation
In active mining, what environmental parameter does a high-volume PM10 sampler monitor?
In mine valuation, which of the following best defines the 'Net Present Value' (NPV) of a mining project?
Mining Engineering 2
What is Hoskold's formula traditionally used for in mining finance and valuation?
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