MNG 230 FINAL
the economic value of mining in the us is about
$2.5 trillion
Mining accounts for approximately ______ of the US economy
15%
you have to remove 30 tons of waste to mine 10 tons of ore. the density of the waste is 40 cubic yards/ton. Find the overall stripping ratio in cubic yards per ton
4 yd/ton
use the following table to calculate the average grade of the deposit
4.94%
three pieces of equipment are used in a given operation. the availability of each piece has been determined to be 90%, 80%, and 70% during a typical shift. the availability of the operation will be approximately
50%
in the us, about how many nonfuel minerals do we have
80
which of these key federal agencies routinely has at least one inspector at each mining operation multiple times per year and in large mines this agency often has at least one inspector on site nearly every single day
MSHA
what happens when the oxygen balance is too high
NOx production
A major trade association in the mining industry is
National Stone, Sand, and Gravel Association (NSSGA)
a labor union found at many unionized mine sites is
United Mine Workers of America (UMWA)
which of the following is true
a lode is a hard rock vein
weight strength
a measure of the explosive energy
what is the difference between a mineral resource and a mineral reserve
a resource is a potentially feasible deposit and a reserve is that portion of the deposit that can be mined economically at a point in time
which of the following statements is true
a significant amount of capital must be available first to open a mine and an engineering study is done before the opening of the mine
which of the following is false
an act is a bill that's been passed by the legislature but has not yet been signed into law
free face
an unconfined face through which the blasted material can move freely
match the rank of coal to its descriptors
anthracite- hard, brittle, black, shiny called hard coal bituminous- looks shiny and smooth but close look shows many layers subbituminous- looks dull lignite- known as brown coal
match the coal rank to its descriptors
anthracite- this is the highest rank of coal bituminous- rank of coal characterized by a heating value and is the most common type of coal used in electricity generation in US subbituminous- not the greatest in the heating value department, but not the worst of the four lignite- lowest grade of coal with least amount of carbon
the owner of a patented claim can use the land for
any legal purpose
this type of mining method can be referred to as a secondary method and used when the first mining method has reached its economic limit
auger mining
why is it necessary to calculate an area or volume of influence
because the sample from each drill will represent a different portion of the orebody based on its location
match the activities to the correct stages of mining
beneficiation activities- exploitation leaving area free of safety and environmental hazards- reclamation preparing for extraction of the ore/material- development finding geologic anomalies- prospecting a problem in risk management- exploration
the general mining law of 1872 defined locatable minerals as the types of minerals that could be claimed under the law
cinnabar copper silver gold
In the US, which fuel minerals do we mine
coal, uranium
after years of hucksters and shysters attempting to sell worthless mineral deposits, major mining countries developed rigorous standards to ensure that conflicts of interest are clearly disclosed, the individuals doing the study meet certain minimum qualification, and to ensure
common definitions are used in reporting technical information
identify the true statements regarding drilling for the purpose of sampling an orebody
cores provide additional detail on the structural features of the deposit not available with cuttings cuttings are useful to determine the grade of the ore
what are some things that blasters must do properly to ensure a successful blast outcome
correct mixing of the blasting agent at the hole (if batch loaded) proper loading procedures if theres water in the hole
the main purpose of the feasibility study is to
decide if the mine should be built or not
during the exploration stage the goal is to
define the deposit in as much detail as is practicable
which type of study would be completed to facilitate the purchase of equipment
definitive
what is the first factor in determining the mining method
depth
the cutoff grade has been calculated for a specific mine, however the cutoff grade will change in the future if
dilution increases recovery in the processing plant increases the selling prices of the refined product increases
a loading machine that can only dig at a level below the level at which it is sitting is known as
dragline
which of the following activities is not necessarily part of the unit operations for softer ores
drill or blast
what are some things that drillers must do properly to ensure a successful blast outcome
drilling the hole at exactly the specified angle controlling the depth or length of the hole
according to the NI 43-101, a qualified person must be attributed to the information. this person is defined as
engineer or geoscientist with at least 5 years experience in mining and in good standing with a professional organization
mining companies are not legally bound to comply with administrative regulations and will not face civil or criminal action for noncompliance
false
the general mining law of 1872 is still controversial today because it allows for the depletion of the supply of valuable minerals
false
the most likely choice of material handling in an underground mine using a continuous mining cycle is
flexible conveyor train
drillability factor and powder factor are two important metrics for monitoring the performance of your operation. choose the best way to represent these factors
ft-drilled/ton of material and lb-explosive/ton of material
what are the three common components to industrial explosives
fuel oxidizers stabilizers
choose true statements about unpatented claims
gives the right to explore and mine only valid during active work land can be reverted back to the public domain
the most likely choice for materials handling in an underground mine with large openings using a conventional mining cycle is
haul truck
the rank of a coal is based on what
heat value percent fixed carbon
acme mining company has just moved into your small, scenic community. which of the following ideas might the company employ to build a positive relationship with the people and community in which they are located
hold an acme mine community day with a cookout, mine tours, and an explanation of sound mining practices
a loading machine that has the ability to load above, below, or at the same level at which it is sitting is known as
hydraulic excavator
if selectivity is important for a surface mining operation which loading machine is the best choice in the following list
hydraulic excavator
continuous haulage includes
hydraulic slurry conveyers
which statement about us mining laws is true
in most cases, if a state's regulation is less protective than the corresponding federal regulation, then a mine will be required to comply with the federal regulation
the amendment to the general mining law of 1872 known as the mineral leasing act of 1920 made a very important change to the 1872 law
it removed several minerals from the list of those that could be classified as locatable under the original law
Choose the common causes for why oxygen balance is lost
lack of confinement poor quality control at the batch mixing truck
rights to prospect, explore, and mine for minerals that are not classified as locatable on public lands are conveyed by
leasing the land from the bureau of land management
continuous mining machines are not commonly used to mine
limestone
a type of an underground caving mining method is
longwall
critical density
maximum density at which the explosion might not propogate
surface mining is divided into two classes
mechanical and aqueous
match the following terms with the definition
mineral resource- a concentration of ore in the earth's crust of sufficient size that may be economically recoverable measured mineral resource- high confidence in the estimate based off of sufficient sampling to ensure geologic and grade continuity between holes indicated mineral resource- reasonable confidence that estimate is accurate, but hole spacing too wide to confirm grade and geologic continuity inferred mineral resource- limited sampling and low confidence in what's there- the estimate comes from extrapolation mineral reserve- the portion of the mineral resource that can be mined economically in time proved mineral reserve- the portion of a measured mineral resource that can be mined economically in time
mining and subsequent mineral processing challenges can be determined by looking at what characterisitics
mineralogy and genesis of the orebody
critical diameter
minimum diameter of the explosive column to sustain the detonation or deflagration; determines size of the hole we drill
what is not an advantage of continuous mining methods
more employees
which of the following are unit operations
none of the answers
what is the fundamental difference between a maceral and a mineral
one is organic and the other is inorganic
if you've acquired the rights to mine on private land, what mineral rights are automatically transferred tp you
only agreed upon minerals
bulk strength
product of density and weight strength of the explosive; is indicative of the explosive energy in the hole
choose the answer that shows the 5 stages of mining in the correct order
prospecting, exploration, development, exploitation, reclamation
what must you do if you find historically or culturally significant items of structures on the land on which you have the right to mine
protect findings
the goal in this mining method is to remove large slabs that can be machined to use in architectural application
quarrying
match the activities to the correct stages of mining
returning to the mine site to its original condition- reclamation using mining equipment to extract the ore- exploitation using accumulated knowledge to narrow the search- prospecting estimating the quantity of the orebody- exploration conducting a feasibility study- development
choose the industrial minerals from this list
salt talc phosphate trona
choose the industrial minerals from the list
salt trona talc phosphate
factors that determine the mining method include
size of orebody topography attitude shape of orebody
rotary drag bits are generally best suited for drilling in
soft materials
match the ore to the mining method used to mine the ore
solution- uranium room and pillar- salt quarrying- marble open pit- copper
an example of passive ground support is the use of
steel arches
in the diagram of a drift face the holes that would be placed in section b should be labeled as
stoping
in the diagram of a drift face the holes that would be placed in section c should be labeled as
stoping
what are some viable structures for directing airflow for good ventilation in underground mines
stoppings curtains auxiliary fans
what is the difference between supported and unsupported methods of mining
supported methods require extensive supported measures. unsupported methods typically rely on minimal articial support depending on the ore
the majority of minerals are mined by
surface methods
which federal us agency is responsible for administering the general mining law of 1872
the bureau of land management
as related to mining, important acts within the category of environmental protection laws are
the clean water act the endangered species act
sub-drilling
the depth of the drill hole below the floor
spacing
the distance between holes
stemming
the inert material placed in the top (front) of the hole
the cutoff grade has been calculated for a specific mine. however, the cutoff grade will change in the future if
the selling price of the refined product increases dilution increases recovery in the processing plant increases
why is it important to understand the mechanical properties of the mined material before it is mine
the strength of the ore generally affects the choice mining method
choose the correct statement
title 30 contains regulations related to the mineral resources
the most important outcome of a good sampling plan is
to acquire accurate estimates on the size and grade of the deposit
what is the goal if mineral processing
to concentrate the minerals of interest to beneficiate the valuable components of the ore to liberate the minerals of interest
why is knowledge of the geology associated with the target mineral useful
to give you an idea of the shape of the orebody so that you can design effective sampling
what is the purpose of a stabilizer as a component to an industrial explosive
to improve handling of the explosive
currently there are fewer than ten uranium-mining operations in the US
true
laws are passed by the government, may have provisions with which mining companies must comply, and often direct administrative agencies to develop specific regulations to govern how the laws will be enforced
true
the real difference between a probable mineral reserve and a proved mineral reserve is the degree of certainty in the resource estimate
true
true or false? to be most efficient and to avoid delays due to shuttle cars, a continuous miner might dump its load onto the mine floor
true
what makes an explosive a permissable explosive
used according to the required practices certified by USBM
which of the following is an advantage of emulsions or slurries over ANFO
water resistance
mechanical mining methods rely on mining the ore
with machinery equipment to extract and break down the ore
A labor union engages in many activities, including:
working with companies on matters of mutual interest advocating for the interests of its members
a trade association engages in many activities including
working with congress on proposed legislation that would affect its members providing technical services of broad interest to its members