Sub l Eves Lllll Nnnnnnn Nnnnnnnnn

8/11/2019 Sub l Eves Lllll Nnnnnnn Nnnnnnnnn

1/20

http://www.edumine.com/courses/online-courses/design-and-application-of-sublevel-stoping-

methods/

Design and Application of Sublevel Stoping Methods

Review #1

The randomly selected multiple-choice questions below are designed to review

your understanding of the material covered in the preceding sessions. Your

selections are lost when you leave the review page. On return the review will

start afresh with a new selection of questions.

You are currently registered for certification and the review is set to certification

mode. Each question has one or more correct responses. Your selection of aresponse is immediately marked correct or not. If you select an incorrect

response you may still make another selection for that question. You receive

one point for each correct response, and lose a point for each incorrect

response. Click the Scorebutton at the end to view your score.

To qualify for certification you must achieve an average score of 75% or more in

the course reviews with a minimum score of not less than 60%. Click

the Submitbutton at the end when you are satisfied with your score. Use Exit

Coursewhen you have completed all reviews.

Q1. Sublevel stoping requires pillars to ... (select one or more)

separate adjacent stopes?

reduce the potential for wall slough?

define stope boundaries?

Q2. With respect to geometric requirements, the dip of the orebody should be _________

the angle of draw of blasted ore? (select one only)

less than... Learn more
http://www.edumine.com/courses/online-courses/design-and-application-of-sublevel-stoping-methods/http://www.edumine.com/courses/online-courses/design-and-application-of-sublevel-stoping-methods/http://www.edumine.com/courses/online-courses/design-and-application-of-sublevel-stoping-methods/http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/courses/online-courses/design-and-application-of-sublevel-stoping-methods/http://www.edumine.com/courses/online-courses/design-and-application-of-sublevel-stoping-methods/


2/20

equal to... Learn more

greater than

Q3. Which of the following terms is synonymous with planned dilution (select one only)?

external dilution... Learn more

internal dilution

unplanned dilution... Learn more

Q4. A sill pillar is aligned transverse to the stope and perpendicular to the strike of the

orebody.

True?... Learn more

False?

Q5. Which of the following drilling methods are the best for drilling straight holes with

minimum deviation? (select one or more)

in-the-hole drilling

down-the-hole drilling

top hammer drilling... Learn more

Q7. Which of the following drilling methods has the greatest penetration rate? (select one

only)

in-the-hole drilling... Learn more

down-the-hole drilling... Learn more

top hammer drilling
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


3/20

Q6. VCR mining requires blasting to a ... (select one only)

horizontal free face?

vertical free face?... Learn more

vertical slot?... Learn more

Q7. In terms of geotechnical requirements, sublevel stoping requires a competent hanging

wall and footwall and a weak ore strength.

True?... Learn more

False?

Q8. The height of a sublevel stope is ... (select one only)

the exposed distance along the hanging wall?

the inclined distance along the footwall?... Learnmore

the vertical distance between levels?... Learn more

Q9. Which of the following stoping methods require blasting into a vertical slot? (select

one or more)

sublevel stoping

longhole stoping

VCR... Learn more

Alimak

blasthole stoping
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


4/20


5/20

mode. Each question has one or more correct responses. Your selection of a

response is immediately marked correct or not. If you select an incorrect








Q1. Which of the following stoping methods require blasting into a vertical slot? (select

one or more)

sublevel stoping

longhole stoping

VCR... Learn more

Alimak

blasthole stoping

Q2. Which of the following drilling methods has the greatest penetration rate? (select one

only)

in-the-hole drilling... Learn more

down-the-hole drilling... Learn more

top hammer drilling
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


6/20

Q3. The span of a sublevel stope is ... (select one only)

the perpendicular distance between the footwall

and the hanging wall?... Learn more

the length of the stope along the strike of the

orebody?

the distance along the exposed hanging wall?...Learn more

Q4. With respect to geometric requirements, the dip of the orebody should be _________

the angle of draw of blasted ore? (select one only)

less than... Learn more

equal to... Learn more

greater than

Q5. In terms of geotechnical requirements, sublevel stoping requires a competent hanging

wall and footwall and a weak ore strength.

True?... Learn more

False?

Q6. Which of the following terms is synonymous with planned dilution (select one only)?

external dilution... Learn more

internal dilution

unplanned dilution... Learn more

Q7. Sublevel stoping requires pillars to ... (select one or more)

separate adjacent stopes?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


7/20

reduce the potential for wall slough?

define stope boundaries?

Q8. A sill pillar is aligned transverse to the stope and perpendicular to the strike of theorebody.

True?... Learn more

False?

Q9. The minimum stope width that can be mined by sublevel stoping is ... (select one only)

0.8m?

1.5m?... Learn more

3m?... Learn more

Q10. The height of a sublevel stope is ... (select one only)

the exposed distance along the hanging wall?

the inclined distance along the footwall?... Learnmore

the vertical distance between levels?... Learn more

Q11. Swell is defined as the volume increase of a material when it is broken and removed

from the natural state.

True?

False?... Learn more
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


8/20

Q12. Sublevel stoping is a highly selective mining method because changes in ore-body

geometry can be easily accommodated.

True?... Learn more

False?

Review #2





You are currently registered for certification and the review is set to certification

mode. Each question has one or more correct responses. Your selection of a









Q1. Sublevel stoping is more suitable for narrower orebodies than longhole stoping.

True?


Q2. The principal difference between sublevel stoping and long-hole stoping is that

intermediate level drill drifts are eliminated.

True?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


9/20


Q3. In long-hole stoping, the principal reason for using large diameter drills is ... (select

one only)

to accommodate more explosive... Learn more

to increase the drilling accuracy

to increase the drilling rate... Learn more

Q4. Ensuring that drawpoints remain full above the brow of a stope helps to eliminate the

risk of air blast.

True?


Q5. The principal objective of transverse open stoping is to mine the secondary pillars

between the primary stoping blocks after the latter have been backfilled with

consolidated fill.

True?


Q6. To accommodate the swell of blasted muck in a stope, a slot should be developed at

... (select one only)

one end of the stope... Learn more

the narrowest part of the stope... Learn more

the widest part of the stope
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


10/20

Q7. Which of the following technolgy developments have contributed significantly to the

viability of sublevel stoping methods by reducing the required development and

increasing production capacity? (select one or more)

drill extension steels

hollow tube rock drills

ITH drilling techniques

Q8. With vein mining, the direction of drilling for blasting is ... (select one only)

parallel to orebody dip?... Learn more

parallel to orebody strike?

perpendicular to the plane of the orebody?... Learnmore

Q9. In the context of VCR mining, a ratio of explosive column length (L) to hole diameter

(D) of _______ or less will behave similarly to a spherical charge. (select one only)

9?... Learn more

6?

3?... Learn more

Q10. In sublevel stoping, drill drives should be developed in both the hanging wall and the

footwall if the stope width is greater than ... (select one only)

5m... Learn more

10m... Learn more

15m


11/20

Q11. The principal difference between vertical crater retreat stoping and long-hole

stoping is that the free face for blasting is vertical rather than horizontal.

True?... Learn more

False?

Q12. Advantages of vertical crater retreat stoping include ... (select one or more)

accommodation of irregular orebodies?... Learn more

high productivity?

short development time?... Learn more

support for hanging wall and footwall?

high degree of mechanization?

Q13. Which of the following drill types are more suitable for wider orebodies? (select one

or more)

DTH drill

ITH drill

top hammer drill... Learn more

Q14. Longitudinal mining, which involves mining along the strike of an orebody, is also

called ... (select one or more)

Alimak mining?... Learn more

Avoca mining?

strike mining?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


12/20

transverse open stoping?... Learn more

Q15. Vertical crater retreat stoping is more suited to orebodies with less competent

hanging wall and footwall because the stope remains full of blasted muck until the end.

True?


Q16. The perimeter of a ring section should always follow the contours of the orebody.

True?... Learn more

False?

Review #2





You are currently registered for certification and the review is set to certificationmode. Each question has one or more correct responses. Your selection of a








http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


13/20







Q2. Vein mining, which is employed with narrow vein ore bodies, is also called ... (select

one only)

Alimak mining?

Avoca mining?... Learn more

longitudinal mining?... Learn more



5m... Learn more

10m... Learn more

15m

Q4. The principal difference between sublevel stoping and long-hole stoping is that

intermediate level drill drifts are eliminated.

True?



accommodation of irregular orebodies?... Learn more


14/20

high productivity?

short development time?... Learn more




one only)

to accommodate more explosive... Learn more


to increase the drilling rate... Learn more


True?... Learn more

False?


or more)

DTH drill

ITH drill



True?

http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


15/20


parallel to orebody dip?... Learn more


perpendicular to the plane of the orebody?... Learnmore



consolidated fill.

True?


Q12. In the context of sublevel stoping, the term toe spacing is defined as ... (select one

only)

the distance between the starts of adjacent drill

holes?... Learn more

the distance between the ends of adjacent drill

holes?

the distance between ring sections at the draw

level?... Learn more

Q13. The principal difference between vertical crater retreat stoping and long-hole

stoping is that the free face for blasting is vertical rather than horizontal.

True?... Learn more

False?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


16/20

Q14. Ensuring that drawpoints remain full above the brow of a stope helps to eliminate

the risk of air blast.

True?




one end of the stope... Learn more

the narrowest part of the stope... Learn more


Q16. In the context of VCR mining, a ratio of explosive column length (L) to hole diameter

(D) of _______ or less will behave similarly to a spherical charge. (select one only)

9?... Learn more

6?

3?... Learn more


True?

False?

Q2. Longitudinal mining, which involves mining along the strike of an orebody, is also

called ... (select one or more)

Alimak mining?

Avoca mining?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


17/20

strike mining?

transverse open stoping?

Q3. Which of the following drill types are more suitable for narrow orebodies? (select oneor more)

ITH drill... Learn more

top hammer drill

DTH drill... Learn more

Q4. In the context of VCR mining, a ratio of explosive column length (L) to hole diameter(D) of _______ or less will behave similarly to a spherical charge. (select one only)

9?

6?

3?


accommodation of irregular orebodies?

high productivity?

short development time?


http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


18/20



consolidated fill.

True?

False?



one end of the stope

the narrowest part of the stope


Q8. Vertical crater retreat stoping is more suited to orebodies with less competent

hanging wall and footwall because the stope remains full of blasted muck until the end.

True?

False?


one only)

to accommodate more explosive


to increase the drilling rate


True?

False?


19/20



5m

10m

15m


parallel to orebody dip?


perpendicular to the plane of the orebody?







Q14. In the context of sublevel stoping, the term burden is defined as ... (select one only)

the mass of rock in a ring section?... Learn more

the weight of explosive required to blast a ringsection?... Learn more

the perpendicular distance between drill rings?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm


20/20


or more)

DTH drill

ITH drill


Q16. Vein mining, which is employed with narrow vein ore bodies, is also called ... (select

one only)

Alimak mining?

Avoca mining?... Learn more

longitudinal mining?
http://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htmhttp://www.edumine.com/xutility/html/documentDisplayEN.htm

Documents

Sub l Eves Lllll Nnnnnnn Nnnnnnnnn