Abstract:

It is difficult to detect the contours of the bad geological bodies ahead of the excavation faces of underground works in case of huge overburdens or complex ground surface conditions. The contours of bad geological bodies are detected by means of seismic waves "angle + position" offset system. The mechanisms and importance of the seismic waves angle offset system in the detection of underground 3D bodies are discussed. The rationality and feasibility of angle offset system in the detection of contours of bad geological bodies in underground works are further presented by means of studying on the mechanisms of ocular bionics. Conclusions drawn are follows: due to the small space needed, the angle offset system is suitable for the detection of the contours of bad geological bodies ahead of the excavation face of underground works; the application of the "angle + position" offset system in the detection of weak rock mass has achieved good result.

Key words: bad geological body, contour detection, position offset, angle offset, "angle +position", offset system