Three-dimensional detection method for use before exploitation of working surface coal bed

The invention discloses a three-dimensional detection method for use before exploitation of a working surface coal bed. The method comprises the following specific steps of: detecting whether a buried geological structure exists at the position of the working surface coal bed by adopting a radio wave tunnel penetration technology, and determining the specific position and range of the buried geological structure; detecting whether a buried water guide structure exists in the range of a working surface bottom plate or top plate by adopting an amplitude-frequency-electricity penetration technology, and determining the specific position and range of the buried water guide structure; detecting whether a buried water guide structure exists below a tunnel bottom plate by adopting a direct-current depth measurement technology, and evaluating; and completely detecting whether buried water guide structures exist inside the working surface and on the bottom plate, the top plate and the periphery by adopting a transient