Coal mine water layer detection, Songzao Coal mine bureau

Subsurface tunnel detection, Shangdong Sci&Tec University

---

Seismograph

Seismic imaging method

seismic imaging gathering interface　　　　　　　seismic imaging manipulation result

Seismic surface wave method

Measured surface wave records　　　　　　　　　　　F-K domain frequency histogram

Analysis results chart

Shallow reflection processed profile

Shallow reflection processed results charts

---

sonic instrument