Quarry Deposit Evaluation & Mine Planning
What is the main and mostly costly step of an exploration?
Core drilling
Which NA plant has the most convoluted geology?
Hagerstown
A haul truck backs up to the Front End loader at a:
45 degree angle
How old is the Devil's Slide plant?
121 years
Material is pouring out of the rubber skirt seal between the belt and load point because:
Inner steel liner is most likely worn
What hazard could be present in the drilling dust when drilling abrasive rock?
Crystalline Silica
The warning on Tom's Truck says:
May stop suddenly for rocks
What are 2 broad categories for classifying & reporting our raw material tonnages?
Resources & Reserves
What is the Holcim tool to plan and schedule the extraction of blocks based on chemistry, quarry, mining directions?
QSO
Which 3 plants have to barge their rock to the plant?
Joppa, Theodore, Richmond
When you benchmark Devil's Slide to other plants, this plant is high in:
Raw Material Costs and Strip Ratio
For most raw material handling applications the best support option under a load zone is:
Impact Bed with rubberized idlers
To mine a uniform, single bench flat-lying deposit, the most appropriate crushing system is:
Mobile
The creek that runs past the plant is called?
Lost Creek
What is one of the most important reasons why we need a block model?
Fundamental basis for mine planning and strategic decisions.
What are the tasks of QSO?
Scheduling, Optimization, Blending, Planning, Reserve Reporting
Shift Efficiency is?
85%
Devil's Slide strip ratio is?
3 TO 1
A raw material belt of 250 m in the plant should not exceed a speed of?
2.0 m/s
What is the most cost-effective method to size reduction material?
Blasting
Devil's Slide is?
Limestone exposed by eroding softer sedimentary rock
What are 2 elements needed to build a geological model?
Topography and supreme knowledge of geology!
How long is each of the following? A long term plan, medium term plan & a short term plan?
Greater than 10 to LIfe of Mine years, 3 to 5 years. 12 months
A front end loader sized appropriately for the haul truck fleets loads scoops in:
30 to 40 seconds
The CAT model of Devil's Slide Haul trucks are:
CAT 777
The minimum recommended distance from the back de-dusting vent to end of the load point skirt board sealing is?
200mm
The most appropriate crusher to crush drv abrasive quartzite at 800 t/h is:
Gyratory Crusher
Who at Aggregates Industries developed the Highwall Safety Scorecard?
Eddy Bailey and Simon Collins
What are the 3 correct considerations when initiating a deposit investigation?
location, permitting & mining rights, chemistry
What are the deliverables of a long term mining plan?
Quarry Engineering & Design, Safe pit design, Production Plan,Reserves and Resources
What are 3 parts of the Highwall Safety Scorecard
Exposure to Hazard, Characteristics of Rock, Berm Distance
The bands Devil's Slide is currently using for limestone are:
New Devil's Slide and C Band
Describe the guarding requirements for a a new belt
Pull cord, guards at tail, pulley, return idlers, snubs, and any area where there is a sealing to the belt (load zone / skirting) - nip point
What is the most common crusher tvpe within Holcim?
Single shaft Horizontal Impact Crusher
Tell us the formula for the Bogue Equation (one component)
See Tom's Sheet