Monitoring mining induced seismicity using optical fibre sensors during mine exploitation

• Fibre-optic based sensing technologies are becoming popular in the field of geophysics since enable long range and high spatial resolution acoustic measurements. In this work, we present preliminary results obtained using quasi-distributed Fibre-Bragg grating sensing and Distributed Acoustic Sensing (DAS) to monitor seismic activities in an operational underground mine. 12 FBGs and 800 metres of fiber optic cable was installed in the tunnel lining an operational mine and recorded mine seismicity such as production blasts and a small seismic activity of magnitude 1.41 in September 2022. 

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering (hsv//eng)

NATURVETENSKAP  -- Geovetenskap och relaterad miljövetenskap -- Geofysik (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)

Nyckelord

Distributed acoustic sensing

Fibre-optic sensing

geophone

mine

seismicity

Fiber optic sensors

Fiber optics

Mining

Acoustic measurements

Acoustic sensing

Fiber-optic sensing

Fiber-optics

High spatial resolution

Mining-induced seismicity

Seismic activity

Sensing technology

Fiber Bragg gratings

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)