When the coal roadway crosses fracture construction, efficient integrated geophysical prospecting technology is often used to determine its water content. However, with the popularization of the integrated geophysical exploration technique, researchers have gradually found that its exploration precision is not high. In combination with the coal mine roadway construction in an ancient city of Shanxi, the authors selected the integrated geophysical prospecting method in combination with water chemical isotope verification and clearly revealed the hydrogeological condition of the coal roadway construction period, thus making up the defect of the integrated geophysical exploration whose accuracy is not high. It is shown that integrated geophysical exploration technique in combination with water chemical isotope can greatly reduce the hidden dangers in the coal roadway construction. The results achieved by the authors provide a demonstration for the same or similar coal roadway engineering construction.