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Geophysical gravimetric method is based on variation of the gravitational field of the Earth, depending on its structure. Any non-uniformity in the density distribution generates its own gravitational field. This distribution depends also on the size, shape and depth of the occurrence of the heterogeneity. These are geological structures and forms of anthropogenic as faults, fracture zones and loosened, emptiness, elution. In the areas of occurrence of such events are generated negative gravity anomalies. Application of engineering version called microgravimetry gives especially good results in the detection of voids present in the subsurface. It allows to predict the risk of expansion and discontinuous deformations.