... 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...

... during excavation, identify the ground variations and recommendation of rock support system and monitor the deep excavation based on instrumentation & monitoring scheme. Estimated ground conditions, optimized rock support and continuous monitoring ensured no damages and safer excavation. 1...

... 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...

.... 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 depth of cover, a field study was carried out in CSM Mine (Waclawik et al. 2016). High grade of coal...

... 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 that stress change of immediate rock masscan be estimated by the CBDM...

... 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...

... instable areas for positioning instruments on the exposed faces. These methods permit to describe the rock mass morphology at higher resolution than normally, providing an almost continuous data coverage on the whole exposed surface. Recent literature extensively reports on applications of 3D laser scanner...

... 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...

... 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...

... 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...

... FIELD INVESTIGATIONS 2.1 General Stress measurements from the surface and from the underground have been carried out by CSMRS at Nathpa Jhakri Project at the following locations. reservoir geomechanics borehole instrument Upstream Oil & Gas horizontal stress hydraulic fracturing...

... structure, without underground water. The overburden is 350m. Fig.l is the diagram of arrangement of the instruments at the I - I cross section. Upstream Oil & Gas tensile stree structural geology displacement Engineering diversion tunnel MPa primary support Indicator sandstone...

.... Reservoir Characterization Measuring System spot bolt excavation Rock strain transition area diameter tensile strain Ginga Tunnel support material displacement rock behaviour subsidence excavation work tunnel measurement Point instrument horizontal strain direction strain new measuring...

... 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...