On-Shift Examination Scenario Continuous Miner Section What you will need: Pencil and paper to take notes or perform calculations Calculator to calculate

On-Shift Examination Scenario Continuous Miner Section

• What you will need:• Pencil and paper to take notes or perform calculations• Calculator to calculate air quantity

• (Quantity = Velocity X Area; Area = Length X Width)• Learning Outcomes:

• Know the locations where an on-shift examination must be performed.• Know what checks must be made at each location during an on-shift

examination.• Know what actions should be taken when required checks are made.• Know what actions should be taken when observing a hazardous condition.

Hazardous conditions may include those relating to:– Guarding– Roof and rib conditions– Gas content– Ventilation– Fire hazards– Dust control– Clean-up

• Know what items to record in the on-shift examination report.

On-shift Examination Scenario Continuous Miner Section

You are the Section Supervisor for the West Mains 003 working section. You have conducted a pre-shift examination and called the report outside. You are now waiting on the section for the crew to arrive. During your shift you will be conducting an on-shift examination, and with the help of others, you will be doing other required examinations and duties on the section. Your crew brought in extra SCSRs and a new fire extinguisher for the battery charging station. You will be correcting all hazards and/or violations you observed and reported in the pre-shift record. Print off and save the pre-shift report for future reference in this problem.

On-shift Examination Scenario Continuous Miner Section

• This is a continuous miner section. Twelve miners work on this section. The entries average 20 feet wide and 5 1/2 feet high.

• The ventilation plan calls for:– Air quantity at least 7000 cfm at all working places where coal is

being cut, mined, drilled for blasting, or loaded.– Air quantity at least 18,500 cfm in the last open crosscut.– Air quantity at least 3000 cfm in working places being bolted.– Air movement in all other places shall be sufficient to dilute,

render harmless and carry away flammable, explosive, noxious and harmful gases, dust, smoke and fumes.

• The roof control plan calls for:– 6 foot bolts on 4 foot centers.– Entry widths shall be no more than 20 feet in width.

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WEST MAINS 003 SECTION

FEEDER TAILPIECE &Mine Phone

Battery ChargingStation

EmergencySupply CarSCSRs

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Water Pump

Your crew has arrived on the section and are gathered at the section power center, they have brought in a new fire extinguisher and extra SCSRs.What should you do at this time?– Let the crew have a break and a snack before

they begin work and discuss what activities everyone did over the weekend.

– Conduct a safety meeting with the crew.– Refer to your pre-shift notes, and inform the

crew of the hazards and violations observed during the pre-shift.

- Incorrect. Let the crew have a break and a snack before they begin work and discuss what activities everyone did over the weekend.

- Correct. Conduct a safety meeting with the crew.- Correct. Refer to your pre-shift notes, and inform the

crew of the hazards and violations observed during the pre-shift.

What should you do at this time?

Now that you have conducted a safety meeting, and reviewed the pre-shift report with the crew, what should you do next?

- Have someone to replace the missing fire extinguisher at the battery charging station.

- Tell the crew where the equipment is and where to start mining and tell the crew to go to work.

- Have someone to take the extra SCSRs to the emergency supply car and put into the SCSR container.

What should you do next?- Correct. Have someone to replace the missing

fire extinguisher at the battery charging station. Refer to 75.1100-2 (e)

- Incorrect. Tell the crew where the equipment is and where to start mining and tell the crew to go to work.

- Correct. Have someone to take the extra SCSRs to the emergency supply car and put into the SCSR container. Refer to 75.1714 (a) (1)

Now that you have had someone to replace the fire extinguisher at the battery charging station and the SCSRs to the SCSR storage container, what should you do next?

- Tell the crew where the equipment is and where to start mining and tell the crew to go to work.

- Have a qualified person to conduct methane examination in all working places.

- Have the electricians make repairs to the pump cable and start the pump.

- Have someone go to the conveyor belt tailpiece and replace the guard and clean up the coal spillage.

What should you do next?- Incorrect. The crew should not begin mining before

required examinations have been conducted and hazardous conditions and violations are corrected.

- Correct. Have a qualified person to conduct methane examination in all working places before electrical equipment is energized. Refer to 75.362 (d) (1) (i)

- Correct. Have the electricians make repairs to the pump cable and start the pump. Refer to 75.511

- Correct. Have someone go to the conveyor belt tailpiece and replace the guard and clean up the coal spillage. Refer to 75.1728 (c), 75.1722 (b) and 75.400

After you had the cable repaired, spillage cleaned up, guard replaced, and the working places examined for methane. What should you do next?

- Travel down the track haulage to ensure Bill is repairing the stopping at #48 crosscut.

- Instruct the continuous miner crew, roof bolter crew and shuttle car crew to conduct a pre-operational examination of their equipment.

- Instruct the continuous miner operator and roof bolter operator to conduct dust parameter examination to assure compliance with the respirable dust parameter specified in the mine ventilation plan.

What should you do next?

- Incorrect. There are other examinations you and the crew need to conduct.

- Correct. Instruct the continuous miner crew, roof bolter crew and shuttle car crew to conduct a pre-operational examination of their equipment. Pre-operational examination should always be conducted to ensure safe operation of the equipment.

- Correct. Instruct the continuous miner operator and roof bolter operator to conduct dust parameter examination to assure compliance with the respirable dust parameter specified in the mine ventilation plan. Refer to 75.362 (a) (2)

The pre-operational examinations and the dust parameter examinations have been completed. What do you need to do next?

- Go to the emergency supply car and check for additional roof support material.

- Instruct the roof bolter crew to replace the six sheared roof bolts outby the face of #3 working face.

- Instruct the continuous miner operator and bolter operator to check for methane in the working place where they will be bolting and mining.

- Perform an air measurement in the working place where the continuous miner will be mining and the roof bolter will be working.

What Should You Do Next?

- Incorrect. Other examinations need to be conducted before mining process begins.

- Correct. The roof bolter crew should replace the six sheared roof bolts outby the face of #3 working face, because men and equipment will be traveling under the unsupported roof condition. Refer to 75.363 (a)

- Incorrect. The roof bolter crew should replace the six sheared roof bolts outby the face of #3 working face, because men and equipment will be traveling under the unsupported roof. Refer to 75.363 (a)

- Incorrect. The roof bolter crew should replace the six sheared roof bolts outby the face of #3 working face, because men and equipment will be traveling under the unsupported roof. Refer to 75.363 (a)


The roof bolter crew has now replaced the six sheared off roof bolts. What should you do next?

- Instruct the continuous miner operator and bolter operator to check for methane in the working place where they will be mining and roof bolting.

- Perform air measurements in the working places where the continuous miner will be mining and the roof bolter will be bolting.

- Remove the check curtain in the last open crosscut of #3 entry to allow more air into the #2 working face.


- Correct. Instruct the continuous miner operator and bolter operator to check for methane in the working place where they will be mining and roof bolting. Refer to 75.362 (d) (1) (ii)

- Correct. Perform air measurements in the working places where the continuous miner will be mining and the roof bolter will be bolting. Refer 75.362 (a) (2)

- Incorrect. This ventilation control is required to ensure the air in the last open crosscut is diverted to the #3 working face which dilutes and render harmless explosive mixtures of methane.

The crew has began the mining cycle of producing coal. What intervals should equipment operators conduct methane examinations during the operation of equipment in the working face?

- 10 minute intervals- 20 minute intervals- 30 minute intervals

What intervals should equipment operators conduct methane examinations during the operation of equipment in the working face?

- Incorrect. 10 minute intervals. Refer to 75.362 (d)(1)(iii)- Correct. 20 minute intervals. Methane examinations are

required at 20 minute intervals or more often if required by the approved ventilation plan during the operation of equipment in the working place. Refer to 75.362 (d)(1)(iii)

- Incorrect. 30 minute intervals. Refer to 75.362 (d)(1)(iii)

At least once during each shift or more often if necessary for safety, a certified person designated by the operator, shall conduct an on-shift examination of each section where anyone is assigned to work. Refer to 75.362 (a) (1)

You are now going to conduct an on-shift examination of the Main West 003 working section.

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• You have traveled to the power center. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check– Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A visual check reveals no hazards and

firefighting equipment is in place Refer to 75.1100-2 (e)

– Correct. A check reveals no roof and rib hazards or violations. Refer to 75.202 (a)

– Correct. The oxygen content is 20.8% and the methane content is 0%. Refer to 75.362 (a) (1)

– Incorrect. The air velocity measure is not required at this location.

– Correct. The air is flowing in the proper direction. Refer to 75.362 (a) (1)

– Incorrect. An air quantity measure is not required at this location.

• What actions should you take?– Correct the hazard or violation – Danger off the area– Certify by initials, date, and time – Enter the condition in your notes.

• What actions should you take?– Incorrect. There is no hazard to correct– Incorrect. There is no reason to danger off

the area.– Correct. Initial, date, and time. Refer to

75.362 (g)– Correct. Enter the condition in your notes.

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• You have traveled to the sealed area. What checks should you make at this location? (Select as many tools as applicable)– Visual check– Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.- Correct. A visual check reveals the seal is structurally

sound and there is no leakage. - Correct. A check reveals no roof and rib hazards or

violations. Refer to 75.202 (a)– Correct. The oxygen content is 20.3% and the

methane content is 0%. Refer to 75.362 (a) (1) – Incorrect. The air velocity does not need to be

checked.– Correct. The air is flowing in the proper direction.

Refer to 75.362 (a) (1) – Incorrect. The air quantity does not need to be

measured at the seal.

• What actions should you take?– Correct the hazard – Danger off the area– Certify by date, time, and initials. – Enter the condition in your notes

• What actions should you take?– Incorrect. There is no hazard to correct– Incorrect. There is no reason to danger off


75.362 (g)– Correct. Enter the condition in your notes

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• You have traveled to a room that has been developed off the # 5 entry. The room has been advanced 22 feet. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A ventilation control is in place. Refer to 75.362

(a) (1) and 75.362 (a) (2)– Correct. A visual check reveals no roof and rib hazards

or violations. Refer to 75.202 (a)– Correct. The oxygen content is 20.7% and the methane

content is 0%. Refer to 75.362 (a) (1) – Incorrect. An air velocity measure is not required at this

location. – Correct. The air is flowing in the proper direction. Refer

to 75.362 (a) (1) – Incorrect. An air quantity measure is not required at this

location.

• What actions should you take?– Correct the hazard or violation – Danger off the area– Certify by date, time, and initials– Enter the condition in your notes

• What actions should you take?– Correct. There is no hazard.– Incorrect. There is no reason to danger off



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• You have traveled to the # 5 working face. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A visual check reveals that ventilation

controls are in place. Refer to 75.330 (b) (1) and 75.362 (a) (1)

– Correct. This working face has been mined. There is a warning device on the last row of roof bolts. Refer to 75.208


– Incorrect. An air velocity measure is not required at this location.



• What actions should you take?– Correct the hazard – Danger off the area– Certify by date, time, and initials– Enter the condition in your notes

• What actions should you take?– Incorrect. There is no hazard – Incorrect. There is no reason to danger off



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• You have traveled to the # 4 working face and crosscut. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A visual check reveals that ventilation controls

are in place. Refer to 75.330 (b) (1) and 75.360 (b)– Correct. A check reveals there are no roof and rib

hazards or violations. There is a warning device on the last row of roof bolts. Refer to 75.202 (a), 75.208 and 75.362 (a) (1)

– Correct. The oxygen content is 20.6% and the methane content is .3%. Refer to 75.362 (a) (1)





• What actions should you take?– Incorrect. There is no hazard. The

concentration of .3% of methane is not enough to be a hazard.

– Incorrect. There is no reason to danger off the area.

– Correct. Initial, date, and time. Refer to 75.362 (g)

– Correct. Enter the condition in your notes.

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• You have traveled to the belt feeder. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A visual check reveals no coal spillage at the

tailpiece and/or around the tail roller. A guard for the tail roller is in place. Refer to 75.400 and 75.1722 (b)

– Correct. A check reveals no roof or rib hazards. Refer to 75.202 (a)

– Correct. The oxygen content is 20.6% and the methane content is 0 %. Refer to 75.362 (a) (1)




• What actions should you take?– Correct the hazard or violation – Danger off the area– Certify by initials, date, and time– Enter the condition in your notes

• What actions should you take?– Incorrect There is no hazards or violations.– Incorrect. There is no hazards to danger off. – Correct. Initial, date, and time. Refer to

75.362 (g) – Correct. Enter the condition in your notes.

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• You have traveled to the # 3 working face and left crosscut. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation



– Correct. There is a warning device on the last row of roof bolts. Refer to 75.208






• What actions should you take?– Incorrect. There is no hazard – Incorrect. There is no reason to danger off



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• You have traveled to the # 2 working face and left crosscut. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A visual check reveals the ventilation curtain is

in place. Refer to 75.330 (b) (1)– Correct. A check reveals no roof or rib hazards. There is

a warning device on the last row of roof bolts. Refer to 75.202 (a), 75.362 (a) (1) and 75.208

– Correct. The oxygen content is 20.7% and the methane content is .2%. Refer to 75.323 (b) (1) and 75.362 (a) (1)





• What actions should you take?– Incorrect. There are no hazards.– Incorrect. There is no reason to danger off



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• You have traveled down the #2 entry to the second crosscut outby the working face, where there is a roof cavity. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Incorrect. Reveals there are no hazards– Correct. A check reveals no roof or rib hazards or

other hazard. There is a warning device on the last row of roof bolts Refer to 75.202 (a), 75.362 (a) (1) and 75.208






• What actions should you take?– Incorrect. There are no hazards.– Incorrect. There is no reason to danger off



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• You have traveled to the battery charging station. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A visual check reveals no hazards and fire

fighting equipment is in place. Refer to 75.362 (a) (1) and 75.1100-2 (e)

– Correct. A check reveals the roof cavity has been supported. Refer to 75.362 (a) (1) and 75.202 (a)





• What actions should you take?– Correct the hazard or violation– Danger off the area– Certify by date, time, and initials– Enter the condition in your notes

• What actions should you take?– Incorrect. There is no hazard.– Incorrect. There is no danger. – Correct. Certify by date, time, and initials.

Refer to 75.362 (g)– Correct. Enter the condition in your notes

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• You have traveled to the emergency supply car. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

• Keep notes on the following.– Correct. A check of the SCSR storage container

reveals there are enough SCSRs for each miner on the section. Refer to 75.1714-4 (a) (1)

– Correct. A check reveals no roof or rib hazards or other hazards. Refer 75.202 (a) and 75.362 (a) (1)



– Correct. The air is flowing in the direction. Refer to 75.362 (a) (1)



• What actions should you take?– Incorrect There is no hazard to correct.– Incorrect. There is no hazard to danger off. – Correct. Certify by date, time, and initials.

Refer to 75.362 (g)– Correct. Enter the condition in your notes.

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• You have traveled to the last open crosscut between #1 and #2 entries. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation

Select as many tools as applicable– Correct .Visual check – Correct. Roof and rib check – Correct. Oxygen and methane check – Correct. Air velocity check– Correct. Air direction check– Correct. Air quantity calculation

• You have traveled to the last open crosscut. You need to determine the air volume in the last open crosscut. The area measures 5 ½ feet high and 19 ½ wide. The air velocity is 165 feet per minute (fpm). What is the air volume moving through this area? – 19,305– 16,087– 17,696

• Where you should take the air readings?– Incorrect. 19,305 cubic feet per minute (cfm)– Incorrect. 16,087 cubic feet per minute (cfm)– Correct. 17,696 cubic feet per minute (cfm)

Refer to 75.362 (c) (1)


- Proceed to #1 entry and continue the on-shift examination.

- Check the ventilation controls on the section to ensure they are in place as required, then inform the mine foreman of the air quantity.

- Check the ventilation controls on the section to ensure they are in place as required and repair if needed, then take another air measurement.


- Incorrect. Proceed to #1 entry and continue the on-shift examination.

- Incorrect. Check the ventilation controls on the section to ensure they are in place as required, then inform the mine foreman of the air quantity.

- Correct. Check the ventilation controls on the section to ensure they are in place as required and repair if needed, then take another air measurement. Refer to 75.362 (a) (1), 75.362 (2),75.362 (c) (1)

Now that you have checked the ventilation controls, made repairs and conducted another air measurement. You now have 19,000 cfm. What do you do next?

– Go to #1 face and continue the on-shift examination.– Record the air measurement in your notes, so you can

record the measurement in the on-shift examination report.

– Inform the mine foreman, that you have the required amount of air in the last open crosscut.

Now that you have checked the ventilation controls, made repairs and conducted another air measurement. You now have 19,000 cfm. What do you do next?

– Incorrect. Go to #1 face and continue the on-shift examination.

– Correct. Record the air measurement in your notes, so you can record the measurement in the on-shift examination report. The air measurement should be recorded in the on-shift examination report.

– Incorrect. Inform the mine foreman, that you have the required amount of air in the last open crosscut.

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• You have traveled to the # 1 working face. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation



– Correct. A check reveals the continuous miner operator had cut the #1 entry 23 ft wide. There is a warning device on the last row of roof bolts. Refer to 75.202 (a), 75.360 (b) and 75.208





What actions should you take?– Note the condition, continue the on-shift

examination and address it with the continuous miner operator when you see him/her.

– Danger off the area.– Correct the hazard. – Certify by date, time, and initials.– Enter the condition in your notes.

What actions should you take?– Incorrect. Note the condition, continue the on-shift

examination and address it with the continuous miner operator when you see him/her.

– Correct. Danger the area off. Refer to 75.363 (a)– Correct. Have the roof bolt crew to install additional

roof bolts and roof to floor supports. Refer to 75.363 (a)

– Correct. Initial, date, and time. Refer to 75.362 (g) – Correct. Enter the condition in your notes.

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You are required to conduct a methane examination in the return of the working section how often?

– Every 2 hours

– Every 4 hours

– Once each production shift.

You are required to conduct a methane examination in the return of the working section how often?

– Incorrect. Every 2 hours.

– Correct. Every 4 hours. Refer to 75.362 (f)

– Incorrect. Once each production shift.

• You have traveled down # 1 return entry. What checks for hazards or violations should you make at this location? (Select as many tools as applicable)– Visual check – Roof and rib check – Oxygen and methane check – Air velocity check– Air direction check– Air quantity calculation



– Correct. A check reveals no roof or rib hazards. Refer to 75.202 (a) and 75.362 (a) 91)

– Correct. The oxygen content is 20.7% and the methane content is .2%. Refer to 75.362 (A) (1)




• What actions should you take?– Correct the hazard – Danger off the area– Certify by date, time, and initials. – Enter the condition in your notes

• What actions should you take?– Incorrect. There is no hazard.– Incorrect. There is no reason to danger off


75.362 (g) – Correct. Enter the condition in your notes to

be recorded in the on-shift examination report.

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• Now that you have conducted the on-shift examination. When do you make a record of the examination?

– When you have finished the examination, you call the report to the surface and have the information recorded and initial the record when you arrive on the surface.

– When you travel to the surface at the end of your shift you record the information.

• Now that you have conducted the on-shift examination. When do you make a record of the examination?

– Correct. When you have finished the examination, you call the report to the surface and have the information recorded and initial the record when you arrive on the surface. Refer to 75.363 (b)

– Correct. When you travel to the surface at the end of your shift you record the information. Refer to 75.363 (b)

• Your are now on the surface, you are going to complete an on-shift report.

• Throughout the shift you tested 12 roof bolts and none were above or below range.

• Using your notes of the on-shift examination and the pre-shift report, complete an on-shift examination report. Refer to 75.363 (c)

Documents

On-Shift Examination Scenario Continuous Miner Section What you will need: Pencil and paper to take notes or perform calculations Calculator to calculate