Underground coal mine geological exploration device and use method thereof

The invention discloses an underground coal mine geological prospecting device and a using method thereof.The underground coal mine geological prospecting device comprises a supporting frame, a lifting assembly, a first mounting plate, a drill rod, a drill bit, a driving assembly, a reaming piece, an inclined rod and an adjusting assembly, and the lifting assembly is used for driving the first mounting plate to move in the vertical direction; the driving assembly is used for driving the drill rod to rotate, a guiding sliding groove is formed in the reaming piece, a part of the inclined rod extends into the guiding sliding groove and is in sliding fit with the guiding sliding groove, and the adjusting assembly is used for adjusting the reaming piece to move in the radial direction of the drill rod. When the underground coal mine geological exploration device is used, aiming at different reaming diameter requirements at different positions, only the position of the reaming part needs to be adjusted through the