Podcast
Questions and Answers
What should not be discounted even if it contains misspellings?
What should not be discounted even if it contains misspellings?
- The briefing officer’s notes
- The team map (correct)
- The team’s final report
- Individual team member notes
Which areas must be mapped by the team?
Which areas must be mapped by the team?
- Areas with elongated unsafe roof (correct)
- Fresh air base conditions
- Unexplored areas of the mine
- Passages with stable roofs
What must be used by all teams to mark their mine maps?
What must be used by all teams to mark their mine maps?
- A handwritten legend
- Their own symbols
- The legend developed by MSHA (correct)
- Generic mapping symbols
What should teams do for objects/conditions not covered by the legend?
What should teams do for objects/conditions not covered by the legend?
What type of mapping issues will be assessed as a discount?
What type of mapping issues will be assessed as a discount?
What must be marked on the team's maps when any ventilation structure is partially removed?
What must be marked on the team's maps when any ventilation structure is partially removed?
How should newly built, intact, and airtight structures be treated in mapping?
How should newly built, intact, and airtight structures be treated in mapping?
After stopping the clock, what must be confirmed on the field?
After stopping the clock, what must be confirmed on the field?
Which of the following must be located on the map for scoring purposes?
Which of the following must be located on the map for scoring purposes?
What key information should be noted on the maps regarding fans?
What key information should be noted on the maps regarding fans?
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Study Notes
Team Mapping and Responsibilities
- Misspellings on team maps do not disqualify the map's validity.
- Teams are not accountable for mapping objects or conditions in the fresh-air base but must include air shafts and mapped objects regardless of exploration status.
- Unsafe conditions in the fresh-air base that cannot be explored by prior teams are exempt from mapping requirements.
Mapping Guidelines
- Objects in hazardous areas must be mapped if the team passes by them.
- MSHA-supplied legend should be used for marking mine maps; additional unlisted items should be marked with an "X".
- Any intact ventilation structures must be referenced in the team's maps even if partially removed.
Recording and Object Locations
- Essential objects to be mapped include:
- Locations of people, smoke, gases, caved areas, unsafe roofs, ignition sources, fans, and fires.
- Changes in conditions, such as intact structures and their operational status, must be noted on the maps.
- Finalized ventilation maps are confirmed with the team captain once operations cease.
Timber Setting Requirements
- New structures built by the team are classified as temporary stoppings, regardless of purpose.
- Timber must be set no more than 5 feet apart and from a safe rib if working in unsafe roof areas.
- Existing timbers from previous teams cannot be utilized by the current team.
Contamination Protocols
- Contaminated areas must be fully explored unless it poses a safety risk.
- Teams must maintain exploration of contaminated entries or adjacent areas until blocked.
- If contaminants are found, teams can select the order of exploration but must return to any blocked areas as soon as safe.
Definitions and Key Terms
- Opening: Any mining entry that connects to rooms or crosscuts.
- Crosscut: A passage connecting two entries.
- Contaminant: Includes smoke, high levels of carbon monoxide, methane, or low oxygen levels.
- Contaminated areas are considered unsafe until the source is identified and resolved.
Operational Rules
- Failure to record all required objects or conditions will result in a score discount.
- Dotted lines must reflect all explored areas, with notation on any removals or changes made to ventilation structures.
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