How should supplies be positioned along a haulage road?

The correct choice highlights the need for safety and efficiency in mine operations. Positioning supplies in a breakthrough or another opening where clearance is not obstructed ensures that they do not interfere with the movement of equipment and personnel along the haulage road. This practice minimizes the risk of accidents or collisions, allowing for smoother operations. Additionally, ensuring supplies are placed where there is adequate clearance means they can be easily accessed when needed, without creating hazards in the roadway.

In mine settings, safety protocols dictate that materials must be stored in a manner that does not impede traffic, which is crucial for maintaining a safe working environment. Proper positioning of supplies also facilitates quicker response times in case of emergencies, contributing to overall operational efficiency. Hence, this option aligns with established safety standards and best practices for resource management in mining operations.