GAME

aray

100

TRUE OR FALSE: The "Bucket Fill Factor" is used because blasted rock has a "swell factor," meaning the bucket is rarely 100% full of solid material.

TRUE
_{Explanation: Because blasted rock has air gaps between the pieces, a bucket that looks full only
contains about 80-90% of actual rock weight.}

200

According to the "Pass Match Rule," how many bucket passes should it ideally take for an LHD to fill a haul truck?
● a) 1 to 2 passes
● b) 3 to 5 passes
● c) 8 to 10 passes
● d) 15+ passes

b) 3 to 5 passes
_{Explanation: This range is the industry standard for efficiency. Fewer passes mean the loader is too
big; more passes mean the loader is too small.}

300

^{Question 2 (Identification):}
____________________: This term refers to the physical "box" or boundary in a tunnel where a
machine must fit, including safety clearances of 0.5 to 1.5 meters.

The Envelope (or Drift Geometry)
_{Explanation: The "Envelope" is the total space required for the machine to move safely without hitting
the walls or endangering personnel.}

mo

100

TRUE OR FALSE: "Tire Wear" is considered one of the highest operating costs in underground mining due to the harsh conditions of the haul roads.

TRUE
_{Explanation: Because underground roads are often wet and covered in sharp blasted rock, tires wear
out much faster than on the surface, making them the second-highest cost after labor.}

200

Which force acts as a "resistance" to truck movement, caused by mud, water, or loose rocks on the
haul road?
● a) Grade Resistance
● b) Match Factor
● c) Rolling Resistance
● d) Bucket Fill Factor

c) Rolling Resistance
_{Explanation: Rolling Resistance is the friction between the tires and the ground. Poor road conditions
underground significantly increase this force.}

300

____________________: This is the required volume of air (measured in m^3/s per kW) that must be supplied to dilute Diesel Particulate Matter (DPM) and exhaust fumes.

Ventilation Requirement (or Fresh Air Requirement)
_{Explanation: Since underground fleets use diesel, we must pump in enough air to keep the
environment breathable for miners}

pakak

100

TRUE OR FALSE: When the Match Factor is exactly 1.0, it indicates an "Under-trucked" operation where the loader has significant idle time.

FALSE
_{Explanation: An MF of 1.0 is the "Golden Number." It means perfect synchronization where no one is waiting.}

200

What occurs when the Match Factor (MF) is "Greater than 1.0" (MF > 1.0)?
● a) The loader is waiting for a truck to arrive
● b) The trucks are queuing and waiting for the loader
● c) The fleet synchronization is perfectly balanced
● d) There is insufficient ventilation

b) The trucks are queuing and waiting for the loader (Over-trucked)
_{Explanation: If the number is greater than 1, you have too many trucks for the speed of your loader,
creating a traffic jam (queue).}

300

Why must "Maximum Dumping Height" be considered when designing vertical clearance in a tunnel?
● a) To prevent the truck bed from striking the ceiling (back) during discharge
● b) To allow the truck to travel at maximum speed
● c) To ensure the operator fits inside the cab
● d) To prevent engine overheating

a) To prevent the truck bed from striking the ceiling (back) during discharge
_{Explanation: If the tunnel is too low, the truck cannot tilt its bed to dump the ore without damaging the
roof or the machine.}