Detection device for mine safety

The invention relates to the technical field of mine detection, in particular to a mine safety detection device which comprises a base, the upper side of the base is slidably connected with sector plates which are evenly distributed and provided with elastic pieces, and the lower side of the base is slidably connected with a spring trigger plate. Wedge-shaped blocks which are uniformly distributed and are in sliding connection with the base are fixedly connected to the upper side of the spring trigger plate, the wedge-shaped blocks are in contact fit with the adjacent fan-shaped plates, a detection rod is in sliding connection with the base, the detection rod is in contact fit with the spring trigger plate, a sound wave detector is in sliding connection with the interior of the detection rod, and an elastic piece is arranged between the sound wave detector and the detection rod. And an annular air pressure rod is fixedly connected in the detection rod. The telescopic end of the annular air pressure rod drives