... seismometers, geophones, high frequency accelerometers and acoustic emission sensors. The combined seismic network allowed for detection and detailed analysis of nearly 200 seismic events with moment magnitudes M W < −4 that occurred solely during the hydraulic fracturing stages. We relocated the seismic...

... the implications in tunneling. Reservoir Characterization variation acceleration record accelerometer tunnel face Upstream Oil & Gas tarutoge tunnel real time system vicinity humidity monitoring excavation face blasting-induced vibration evacuation tunnel rock mass excavation tunnel...

... Upstream Oil & Gas ground surface metals & mining reservoir geomechanics accelerometer Zonguldak tunnel axis Aydan Reservoir Characterization maximum acceleration adjacent tunnel monitoring Engineering attenuation relation estimation blasting-induced vibration stress...

... source driving a swept frequency signals into the rock which allowed conducting the survey without stopping the traffic; nor was it the use of high sensitivity, broad-band accelerometers for detecting seismic waves in the rock. It was the fiberglass waveguides (1 meter long), anchored to the rock via...

... Upstream Oil & Gas tunnel alignment accelerometer fujikawa tunnel Reservoir Characterization true reflective tomography contour reflective anomaly tunnel face tomogram boundary TBM tunnel anomaly sta alignment kanaya tunnel reflective anomaly Japan tunnel TRT survey...