... methods and pre-supports can be studied and installed to control the behavior if required. For this purpose, the ground displacement ahead of the tunnel face (tunnel pre-displacement) is often measured by in-tunnel instruments. For example, Sakai et al. (2016) reported a case study of an underground metro...

... ABSTRACT: Rock slope discontinuities can be analyzed using 3D point clouds (3DPC), which are typically acquired through 3D laser scanning (3DLS) instruments or Structure from Motion (SfM) photogrammetry. While 3DLS is often regarded as a precise dataset, the use of SfM is gaining popularity...

... deformation of the paste fill measured in UCS tests were used to anticipate the regional displacement. Also, another instrument named smart MPBX's were used for modelling accurate movement. All results of monitoring have been recorded and correlated with mining activities. In conclusion, a new access drift...

... upstream oil & gas excavation monitoring basalt ground transportation safer excavation shaft rail transportation investigation settlement recommendation deflection instrument geomechanics structural geology reservoir characterization engineering geological assessment...

... Abstract Monitoring plays major role in every stage of the project from exploration, construction and operation of the underground cavern. Large cavern in Bhutan Himalayas is being monitored with geotechnical instruments since the construction period. The behavior of the cavern is being...

... instrumental casing. These diameter changes measured by four gauges of different orientation gives the instrumental strains. The coupled parameters between the strain in the rock and instrumental strains must be in-situ calibrated, which is usually done by the comparison between instrumental strains...

... (Singh et al. 2011) and numerical modelling (Cai 2008; Singh et al.; Lu et al. 2010; Singh et al. 2016; Jiang et al. 2016). The in-situ performance during mining and post-mining is normally measured using various geotechnical instruments. In order to understand the behaviour of coal pillars at 850 m...

... to active and passive seismic sources, such as sensing ground vibration for border control (Owen et al. 2012), and ground movement for dam stability assessments (Thévenaz et al. 1999). reservoir characterization dof instrument hydraulic fracturing geophone spatial resolution microseismic...

... of a rock cavern is measured. Firstly, the theory of the CBDM is described, as well as the prototype instrument with the laser displace- ment sensor. Secondly the measurement site and results are described. Then the stress changed due to excavation of the cavern is discussed. Finally, it makes clear...

... precision. As a line-of-sight instrument, however, these tools only provide data on displacement magnitudes and rates, but not directions, hence limiting their use in gaining understanding of the 3-D kinematics and behavior of the moving slope. Two ground-based synthetic aperture radar systems were...

... the granite bedrock. structural geology stability condition instrument determination dimension Laser Scanner Survey application orientation rock slope discontinuity rock mass Reservoir Characterization stability analysis rock face kinematism geostructural survey reconstruction east...

... or not easily accessible areas are present, as it often occurs in quarries. Indirect measurements, such as those collected by means of laser scanner and photogrammetric surveys, do not require to access potentially instable areas for positioning instruments on the exposed faces. These methods permit to describe...

... by several joints. It is estimated that the rock cliff had collapsed in the past, since its shape was overhanging and many fragments were found on its foot. Therefore, the cut off construction should be performed to stabilize this rock cliff. (see Fig. 1). frequency displacement instrument...

... pressure instrument rock mass liquified natural gas extensometer pilot cavern operation drainage system LNG displacement rock cavern low temperature construction temperature profile Rock displacement geotechnical monitoring containment system 11th Congress of the International Society...

... test (Cheung, 1989). 2.2 Rock strength determination The used instrument is the WQCZ-56 test rig (see Figure 2). It is composed of displacement reading device, probe, hand pump, and installing rod. The diameter of the probe is φ 54 mm. hydraulic fracturing Institute MPa reservoir...

... data measured from the reference-lined core and, eventually, the significance and applicability of DOM drilling system for site exploration are verified by comparing with the spatial characteristics of joints investigated by implementing borehole image-taking instruments in the same borehole...

... As part of safety and stability studies at three underground mines in the United States, researchers installed earth pressure cells and embedment strain gauges in cemented rockfill to measure stress and strain changes as mining progressed and the rockfill was loaded. Data from these instruments...

...) instrumentation was usedin conjunction with other observational, analytical, and numerical techniques to evaluate cable design performance and determine the nature of the failure mechanisms. This case study also provides an excellent comparative study of the in situ bond stiffness of plain strand and Garford bulb...

... ABSTRACT: Numerical modelling using Finite Difference Method and observational approach using field instrumentation were applied to different coal mines with bard and pillar workings. An empirical relation has been established to correlate the actual displacement as measured in the field...

... ABSTRACT: The paper presents the analysis of instrumentation data over a ten year period for the first large cavern constructed and instrumented in soft rock of lower Himalayan region which is seismo-tectonically active. The influence of earthquake on the support pressure has been studied...