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Keywords: experiment
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Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-026
... Rock mechanics experiment determination shut-in pressure fractured rock mass Abstract Despite the extensive theoretical work on the subject of hydraulic fracturing for stress measurements, the amount of experimental work has thus far been limited, especially in the case of its validity...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-047
...- sure area is present. 4. CONCLUSIONS The following conclusions can be derived from the experiments: A technique was developed and implemented in order to measure stresses in rock massifs, using memory effects in near-borehole rocks. The technique has the advantage of relatively unlaborious experimental...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-020
... stress value were preliminary obtained. TEST EQUIPMENT AND SAMPLE PREPARATION Test equipment The large size true three axis hydraulic fracturing simulated experimental system was used in the experiment. The system consisted of three axis test stand, MTS servo booster pump, data acquisition system...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-045
... Abstract Majority of experimental strength and deformational characteristics of rocks are obtained from uniaxial tests, mainly from compression tests, or through the particular triaxial experiments commonly known as Conventional Triaxial Compression (CTC). The procedure of CTC test usually...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-040
... in the EDZ and provides better evaluation of the long-term safety and integrity of the rock mass around engineered openings in the nuclear disposal facility. Raasakka experiment Onkalo Ray Coverage plane excavation damage zone tomography p-wave velocity Upstream Oil & Gas borehole sensor...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-014
... ABSTRACT: The Downward Compact Conical-ended Borehole Overcoring (DCCBO) technique is one of the overcoring methods. In this study, a measurement theory for application of the DCCBO technique to orthotropic rock is proposed. Numerical experiments with the use of a 3D-FEM analysis were...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-050
... and caving angle could gain in the experiment.[8] According to the experimental analysis of observa- tions, the roof rock beam destabilized because of the first weight and periodic weight in the process of min- ing working face. The roof and the floor moved close continually and subside faster. The in-situ...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-012
... pressure accurately. On this field tests, the fractures induced with hydraulic fracturing method were re-opened by the borehole-jack in the range of pressure value similar to hydraulic fracturing. This paper describes our results of numerical analyses, laboratory experiments, and field tests. 1...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-125
...). However, the confinement can change this strength and subsequently yielding. Thus, from experimental observations the change of yielding at different scales is investigated. The experiments are conducted on cylindrical samples of sandstone with diameters of 50 and 96 mm. Every specimen was tested...

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