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Keywords: instrument
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Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-155
... 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...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-152
... 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...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-203
... 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...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-341
.... 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...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-191
... 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...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-364
... 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...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-120
... 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...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-247
... 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...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-271
... 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...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-121
... 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...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-066
... 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...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-233
... 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...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-210
... 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...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-252
...) 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...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-030
... 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...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-127
... 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...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-262
.... 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...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-247
... 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...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-239
... 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...

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