What is the requirement for safety engineers in a Class B mine?

In a Class B mine, the requirement is to have at least one part-time safety engineer. This designation is in line with regulatory standards that ensure there is adequate oversight and management of safety practices within the mining operation. The role of the safety engineer is critical in monitoring safety protocols, conducting risk assessments, and ensuring that safety measures are effectively implemented to protect workers and the environment.

Having at least one part-time safety engineer allows for a dedicated focus on safety without the necessity of having a full-time position, which might not be feasible depending on the mine's size or operations. This flexibility acknowledges that while safety is paramount, the scale of operations may not always require a full-time engineer.

In contrast, the other options suggest an unnecessary increase in the number of safety engineers beyond what is mandated or practical for a Class B mine, which might lead to additional costs without significantly enhancing safety outcomes. Therefore, the requirement of having at least one part-time safety engineer is both sufficient and aligned with the regulatory expectations for this class of mine.