EXPERIMENTAL STUDY ON SEISMIC PROSPECTING TECHNOLOGY UNDER VOLCANIC ROCK COVER

Density and seismic wave velocity of volcanic rock generally higher than the sedimentary rock at same depth,it possesses more obvious density and velocity differences with surrounding rock.Interface shape and occurrence between volcanic rocks and surrounding rock are complex,resulting in seismic wave imaging difficulties.The authors discuss the seismic technology suitable for prospecting deep metal mine under volcanic cover combing with seismic exploration in Lishui volcanic basin.It helps to obtain the reflected wave formed by volcanic rock internal and its underlying strata interface using acquisition pattern of small group interval,long spread,high fold,shooting at volcanic rock top interface or internal volcanic rocks.