Abstract: A mine safety system having at least a substantial portion of a mine conduit buried within a trench that is formed in the mine floor is provided. The mine safety system can be sturdy and durable in construction and in operation because a substantial pressure from a mine collapse is transferred to the surrounding earth or soil when the mine conduit is partially or fully buried in the mine floor. The mine safety system can be simply and inexpensively installed in newly constructed mines or retrofitted in existing mines. The mine conduit can be made of a lightweight plastic which can make handling of the conduit easier. Moreover, installation of the trench and the mine safety system is quicker and easier with use of a cutter drum that can form a curved trench bottom when the conduit is circular.