FULL BLASTING LICENCE BOARD QUESTIONS (18 MARCH 2008)

FULL BLASTING LICENCE BOARD QUESTIONS (18 MARCH 2008)1) Draw and label a round.

2) Ratio of 98:2 AN/FO. What is the outcome?3) What is the maximum allowable temperature in magazine?4) What do you suspect if the temperatures in the magazine are at 370. How do you remedy the situation?5) What do you understand by delayed effect?6) Give a detailed outline of the force-exhaust overlap system. What are the ventilation column sizes and the power ratings for both fans?7) A gang leader has been charging 30 holes. Towards the end of charging, whilst you are advancing towards the face he is charging, there happens to be a sound that indicates accidental detonation has taken place. What is your procedure to rescue the guy?

8) Give 5 reasons you think might cause inadequate ventilation at 3L as shown above. Why do you take guys to hospital for 48 hrs. Tell us detailed effects of the gases on the gased person?9) A drainsman is seated and there is a diesel loco tramming ore from a box just adjacent to the drain. What is the first that you do? What is the use of a barricade?

10) You have been told to go and develop A with 5g/t of Au and A had been stopped 5 years ago. There is also drive B which is under development, what is your procedure to mine A? In case you have encountered weak ground at A, what type of support do you use if the manager wants you to advance the end with high speed development?

11) On carring out re-entry you find the raise is chocked as shown below. Tell us your procedure.

12) You have two ends approaching each other and there are 40m apart. Tell me you procedure until you hole the two ends.

*THE END*Lashing crew

1L

A

3L

Dust

Drains man seated

Loco tramming

A

B

10m

40m