Patent Document ID: 3949353
Application ID: 05589569
Patent Flag: 1

Claim One:
1. A system for continual surveillance of an underground mine location having a tunnel system, said system comprising: plural patterns of radially arrayed seismic energy receivers disposed in spaced locations of the earth's surface above said underground mine in predetermined relationship with respect to said tunnel system of said mine, wherein said radial arrays of receivers each consists of plural lines of equi-spaced geophones with the lines extending outward at selected equi-angular disposition from a selected point at the respective location; means receiving and amplifying received signals from each of the plural radially arrayed receivers from each pattern to provide plural seismic signal outputs; means receiving and time-orienting said plural seismic signal outputs to determine the character of seismic energy and directionality of received seismic signals; and means indicating said character of seismic energy and respective origin of said seismic energy within said underground mine location and the tunnel system thereof.