1/1 Mine Planning, Design and Development FTB
b
A ---------------- is ideally applicable to open cast coal mining in the Philippines. a) front-end loader b) bucket wheel excavator c) power shovel d) backhoe
c
A controlling factor in determining the choice of mining method between open pit operation and underground method a) grade of oreb) stripping ratioc) spatial position of ore bodyd) hardness of ore
a
A failure that occurs below the toe of the bank: a. base failure c. slope failure b. slip circle failure d. toppling
c
A failure that occurs intermediate between the crest and the toe: a. base failure c. slope failure b. slip circle failure d. toppling
d
A new method of hoisting that is design for every deep shaft extending more than 6,000 ft. in depth. a. drum c. koepe b. friction-sheave d. multi-drum
d
A positive ore reserve is synonymous to: a) inferred ore b) probable ore c) possible ore d) measured ore
a
A sampling method involving the taking at regular intervals spot samples across the underground development works to obtain the average grade of the ore a) channel b) chip c) grab d) car
b
A small-scale method of recovering gold in placer deposits using long wooden troughs with crossbars to check water velocity a) panning b) sluicing c) hydraulicking d) dredging
d
A term commonly used in coal mining for an adit or a gently inclined shaft a) cross-cut b) drift c) level d) entry
b
A type of drill used in stoping and raising operationsa) airlegb) stoperc) sinkerd) raise climber
c
A wire rope that is suitable for any system (drum hoist or friction-sheave) at depths of over 3,200 ft is a. flattened strand c. locked-coil b. round strand d. all of the above
a
All unit operations involved in excavating or moving bulk minerals during mining. a. Materials handling; b. Loading; c. Hauling; d. Hoisting.
...
An additional parameter in assessing between projects is: a. Return on assets b. Return on initial investment or present value ratio (PVR) c. Incremental analysis d. Sensitivity analysis
b
An aid in mine planning and design a) pick and shovel b) computer c) Brunton compass d) shaft
b
An effective way to operate a mine with conventional haulage methods in an inclined seam or bed is to drive all openings cross-pitch, that is: a. at an angle to the dip of the deposit b. at an angle to the strike of the deposit c. at an angle half the dip of the deposit d. at an angle 450 to the dip of the deposit
a
An example of underhand stoping a) top slicing b) resuing c) shrinkage d) cut-and-fill
c
An explosive produces toxic fumes when: a. excess fuel c. fuel shortage b. excess oxygen d. balanced-oxygen content
b
An underground mining method which is economically comparable to open pit mining. a) sublevel caving b) block caving c) sublevel stoping d) shrinkage stoping
...
Corporate planning includes the following except: a. Business assessment & strategic planning b. Operational planning c. Annual planning d. None of the above
3.78M
Determine the daily and yearly production rate in a room and pillar coal mine using conventional equipment under the following conditions: Working place ...............6 x 18 ft Working time..................7 hr/shift, 2 days/shift, 250 days/year Working sections............14 Advance per cut..............10 ft Cuts per shift...................12 Tonnage factor (tf)................24 ft3/ton Solution: Volume mined/cut V = 6 x 18 x 10 =1080 ft3 Weight/cut W = V/tf = 1080/24 = 45 tons Section production = 45 x 12 x 2 = 1080 tons/day Mine production = 1080 x14 x 250 =______tons/year
b
Diameter holes in surface mines are generally: a. 10-20 in. c. 12-24 in. b. 6-18 in. d. 5-10 in.
no answer
Diameter holes in underground mines are generally: a. 10-20 in. c.12-24 in. b. 1-4 in. d. 5-10 in.
b
Employed in non-coring exploration in shallow holes in soft to medium-hard ground, either rock or soil. Diamond drilling; b. Rotary drilling; Percussion drilling; d. Auger drilling.
b
Employed to accomplish rock penetration particularly in percussive drilling. a. Bit rock cutting; b. Dynamic loading; c. Cyclic loading; d. Abrasion.
b
Excessive spacing or deficient spacing of draw points causes weight problems on: a. undercuts c. crown pillars b. sill pillars d. barrier pillars
d
For paper cycle balance in hauling, the cycle time for trucks must be: a. half the time required to spot and loads the entire truck fleet. b. Equal to the time required to spot and load the entire truck fleet. c. Greater than the times required to spot and load the entire truck fleet. d. Less than the time required to spot and load the entire truck fleet.
d
Fuels and oxidizers are the principal reacting ingredients in explosives. Which do you think is not a fuel? a. TNT c. carbon b. aluminum d. NaNO3
c
Hole patterns used only in soft to moderately hard rock (coal, potash, salt, etc.) to provide an additional free face for blasting. They lower the risk of explosion in a flammable atmosphere, such as in coal mines: a. pyramid cut c. kerfs b. burn cut d. V-cut
c
If you are a draw control engineer in a block caving operation and you are required to have at least a subsidence of 1 meter of the caved ore from each draw raise, compute for the amount of draw you should get from each finger raise (each with a diameter of 3 meters) considering that the insitu density of the ore is 2 MT/cu. m. with a swell factor of 17 % upon caving. a. 14.10MT/m c. 12.10MT/m b. 19.47MT/m d. 15.22MT/m.
...
In LHDs, the biggest impact of mechanization apart from increased productivity is: a. Ventilation requirements b. Operator training c. Ramp development d. Mechanical maintenance
a
In a typical mining bench operation, 1 ft of ore face must be exposed for each 4 to 5 tons of required daily production. Supposing the required daily production is 20, 000 tons, the advance stripping of the bench face must continue until: a. 4, 000 - 5, 000 ft. c. 2, 000 - 3, 000 ft. b. 10, 000 - 12, 000 ft.d. 6, 000 - 7, 000 ft.
c
In actual caving, it is this action which dilutes the ore with waste during drawing: a. draw control c. funneling b. ellipsoid of motion d. gravity flowing
c
In an open pit mine design, these are located on each section so the ore grade line supports a stripping ratio of corresponding to the break-even stripping ratio or allowable stripping ratio: a. cut- off grades c. pit limits b. pit slope angle d. bank slopes
a
In coal mining, this is the creation of a strong, inflexible beam by bolting or otherwise fastening together several weaker layers: a. beam building c. bolting b. barrier pillars d. grouting
...
In conveying, surcharge angle is relevant during: a. Loading b. Hauling c. Discharge d. All of the above
...
In conveyors, the design process starts with: a. Material characterization b. Conveyor layout c. Safe speed d. Power supply
b
In general, with the off-the-shelt technology, the lowest cost of penetration in soft rock is obtained using: a. percussion drilling c. rotary-roller bit drilling b. rotary-drag bit drilling d. rotary-percussion drilling
...
In hoisting, the most popular type being used now is: a. Single drum b. Double drum c. Blair d. Friction
...
In mine dewatering the least impact on energy requirements is for: a. Datum head b. Velocity head c. Friction head d. Shock losses
...
In mining, fragmentation is important because of: a. Loading equipment requirements b. Transporting equipment requirements c. Movement of ore and waste in the stope and column d. All of the above
...
In the underground mine, the most important factors in maximizing the production capacity include the following, except: a. Size of openings that can be driven and maintained (safety and economy) b. Equipment capacity c. Fleet size d. Water inflow
...
In track haulage, drawbar pull will equal the total resistances from the following, except: a. Gradient resistance b. Train load (mine car + payload weight) c. Curvature resistance d. Locomotive resistance
d
In underground mines, which of the following is classified as continuous mining? A. shaft mocker c. slushier b. loader d. boring machine
b
It is any division or branch of the ventilation circuit: a. air split c. airway b. split d. air course
a
It is considered the most important explosive parameter in breaking and displacing rock in blasting, or otherwise known as explosion pressure: a. borehole pressure c. detonating pressure b. high explosive pressure d. high velocity pressure
b
Method used for ore reserve estimation that involves the application of mathematics of random functions to the reconnaissance of mineral deposits. Krigging; b. Geostatistics; inverse distance method; d. Volume of influence method.
...
Mining costs are manageable in the following aspects except: a. Labor costs b. Most mining costs (except labor costs) c. Power costs d. Labor cost per ton
a
Mining method most applicable in high grade but narrow veins. a) resuing b) cut-and-fill c) square set stoping d) open stoping
b
Mining method that is exclusively by retreating method with the cut-off grade serving only to define the fringes of major ore zonesa) open pitb) block cavingc) cut-and-filld) solution mining
b
Multiple openings are necessary in coal mines because they provide a. good access to the coal c. good recovery of the coal b. adequate ventilation d. minimal distances
d
One of these is classified as both rock fragmentation and rock penetration. a. ripping c. impact b. drilling d. jet
a
Road-grades are based on the following criterion; a. from trucks performance charts on breaking and speeding b. soil cohesion c. pit stability d. all of the above
d
Rope fleet angle is the angle subtended by the hoist rope and the centerline from the drum to reduce rope abrasion in the sheave groove, the fleet angle should be restricted to: a. 2-5/2degrees c. 1-2degrees b. 3degrees d. 1-3/2degrees
d
Slope of the final pit limit that defines geographically the boundaries of the open pit reserves a) working slopeb) bench slopec) angle of reposed) final pit slope
b
Solids blocks of coal or rock left between two miners or sections of a mine to prevent accidents due to inrushes of water or gas, or to protect pillars in headings against crushing: a. beam buildings c. gob b. barrier pillars d. fillings
c
Supplements the pit design and reserve estimation work that is usually done for feasibility and budget studies and is an important element of the decision making process: a. long range mine planning c.long range production planning b. short range mine planning d. short range production planning
...
The Lerchs-Grossmann pit optimization algorithm relies on: a. Mining costs b. Grade distribution c. Pit configuration d. All of the above
a
The activity, occupation, and industry concerned with the extraction of minerals. a. Mining; b. Metallurgical engineering; c. Geotechnical engineering; d. Mineral Resource Engineering.
c
The best road gradient is between the ranges of: a. 7-12% c. 8-12% b. 8-15 % d. 7-15%
b
The concept of replacing the intermittent operations of rock breakage and material handling in mining with a system of continuous extraction. Automation; b. Rapid excavation; c. Novel method; d. Robotics.
d
The drilling rate of a blast hole rig depends primarily on: a) rotary speed and bit thrust b) rock type c) flushing medium d) all of the above
...
The floating cone is a useful initial approximation open pit planning; the direction of the deepening and enlarging of the cone depends mainly on: a. Continuity of the deposit b. Grade considerations c. Pit slope d. Pit stability
c
The freeing or detaching of large masses of rock from its parent deposit. Rock fragmentation; b. Earthmoving; c. Rock breakage; d. Material handling.
...
The highest safety factor in the design of transport and haulage systems in mines are in: a. LHDs b. Track haulage c. Conveyors d. Hoisting
...
The limits to open pit mining is determined by: a. Economics b. Technology c. Pit slope stability d. Production capacity
...
The overall pit slope varies around the pit varies mainly because of stability reasons brought about by: a. Ramp location b. Road location c. Fracture attitude d. Water inflow
c
The process of forming a direct hole or kerf on a rock surface, usually mechanically, but sometimes hydraulically or thermally. Rock cutting; b. Fragmentation; c. Rock penetration; d. Cyclic loading.
d
The recommended pit slope for gravel is: a. 22degrees c. 16degrees b. 35degrees d. 37degrees
b
The recommended pit slope for the solid country rock is: a. 60-80degrees c. 45degrees b. 63-72degrees d. 50degrees
a
The second level in engineering evaluation in which the various operational concepts are quantified and compared, resulting in firm designs and costs. a. Engineering study; b. Detailed design study; Conceptual study; d. Long-term plan.
a
The sequence of unit operations used to accomplish mine development or exploitation. a. Cycle of operation; b. Mining sequence; c. Mining plan; d. Development plan.
c
The total area around an airway is called a. regulator c. rubbing surface b. surface area d. resistance surface
b
The volume of production at which total revenue equals the total cost. Break-even stripping ratio; b. Break-even volume; c. Tonnage factor; d. Overall stripping ratio.
c
These are special air courses developed and maintained as part of the mine ventilation system that are design to continuously move air-methane mixtures emitted by the gob away from active workings and into mine-return-air courses: a. airways c. bleeder entries b. air courses d. overcasts
c
These are specially formulated mixtures that are safe to use in flammable atmospheres in underground coal mines: a. ANFO c. permissible b. NG explosives d. black powder
c
They resemble open pits but the benches are lower and nearly vertical. Faces; b. Strips; c. Quarries; d. Breasts
d
This is a type of placer mining a) strip mining b) quarrying c) open cut mining d) hydraulicking
a
This mining method is basically an overhand stoping system in which a portion of the broken ore accumulates until the stope is completed. a) shrinkage stoping b) cut-and-fill c) sublevel stoping d) square set stoping
b
This mining method is generally employed in steeply dipping bedded deposits with fairly uniform grade where the stopes are mined a) sublevel caving b) sublevel stoping c) shrinkage stoping d) top slicing
a
This mining method is generally used for deposits where the ore is structurally weak and where faulting and rock fracturing predominates a) block caving b) shrinkage stoping c) square set stoping d) top slicing
a
Underground mining method used by small-scale minersa) gopheringb) cut-and-fillc) glory holed) top slicing
a
Underground mining method which utilizes natural support for openings that result from ore extraction a) room-and-pillarb) square setc) cut-and-filld) block caving
c
What is the most important factor in designing blasting grounds? a. property of rock c. hole pattern b. drill hole diameter d. type of explosive
c
What type of access will you choose for deep horizontal (< 300), vertical, steeply inclined (< 700) deposit? a. slope with haulage c. vertical shaft with hoisting b. d. inclined shaft with hoisting
d
What type of opening is most suitable considering the following conditions: a deposit outcrops in an area of high relief and shallow cover; it dips steeply and can be intersected at relatively shallow depth. a. decline c. vertical shaft b. slope d. adit
c
Which do you think is a fuel? a. CaCO3 c. TNT b. AN d. NG
d
Which of the following is classified as both excavating and rock fragmentation method? a. ripping c. blasting B. hydraulic king d. both b and c
b
Which of the following is classified as continuous mining? a. shovel c. scraper b. dredging d. dragline
b
Which piece of equipment removes materials by pulling its bucket toward the machine? a) shovel b) bucket wheel excavator c) dragline d) front-end-loader
a
Wood or steel member of a shaft that are hitched or protruded into the wall to support the weight of certain members of shaft sets.a) hanging boltb) hitchc) girtd) bearer
...
World metal prices are determined by the following except: a. Demand for the metal b. Supply of the metal c. Geo-political events d. None of the above
d
________ in the direction of the mine entrance. a. entry c. in by b. portal d. out by
