Roadway multi-azimuth advance detection method

The invention discloses a roadway multi-azimuth advance detection method for detecting the water body or other bad geologic bodies at the head and periphery of a roadway when the roadway is excavated. The method comprises the following steps: firstly, cutting off all the commercial power supplies in the roadway and eliminating the metal pieces in the measuring space of the roadway; and then, carrying out the multi-azimuth advance detection on the roadway by adopting a distributed measuring mode by utilizing a transient electromagnetic instrument, wherein the detection azimuth is determined by utilizing a geometric orientation method or a gradient rule orientation method in the detection course. In the method disclosed by the invention, the one-dimensional detection of the conventional advance detection is expanded into the multidimensional detection; the hidden water bursting danger conditions in the excavation sweep range of the roadway can be investigated to the maximum limit, thereby providing geophysical prospecting technical basis for the excavation safety. In the method disclosed by the invention, the detection range and detection distance of the head advance detection of the roadway are expanded; the detection efficiency is greatly enhanced; and the practical significances on the aspects of guaranteeing the excavation safety, coordinating the rapid excavation of high-yield and high-efficiency mines and enhancing the production efficiency are great.