1-20 of 53
Keywords: strength
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-097
... level of the researcher. To remove this bias, the root mean square first derivative values (Z 2 ), a statistical numerical parameter, is revealed, which is also easily to be determined. upstream oil & gas root mean square method mechanical property joint roughness coefficient strength...
Proceedings Papers

Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-092
... geotechnical parameters of discontinuities that have great effect on the shear strength of the joints. This research tries to find a logical relation between uniaxial compressive strength (UCS) of the filling materials with shear strength of the filled discontinuities. For this purpose, joints are made...
Proceedings Papers

Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-062
... significantly influence the strength of specimen. Moreover, the simulations show that increasing the pre-existing porosity reduces specimen strength, due to the concentration of stress around the voids, and that intra-granular cracking is the dominant contact damage mechanism during uniaxial compression. 1...
Proceedings Papers

Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-028
... physico-mechanical properties such as compressive and tensile strength, porosity and dry density served as input parameters for the prediction of CAI. A comparative analysis of various performance indices has been conducted in order to establish the efficiency of the developed models. The results suggest...
Proceedings Papers

Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-033
... samples are more ductile than sandstone samples Thus, there are mainly three types of rock failures for glutenite, namely fracture termination, deflection and penetration, which all controls by combining effects of gravel strength and confining pressures. Fracture deflection and penetration modes dominate...
Proceedings Papers

Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-036
... direct shear tests were conducted under the dried and immersed conditions to measure a residual strength (τ res ) of the specimen. In a direct creep shear test, the specimen was subjected to immersion under creep shear stress conditions (σ v = 25, 100 or 200 kPa, τ = Rσ v , R = 0.7~1.0). After the creep...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-046
... computer codes. Stability of the structure is evaluated by comparing the capacity (strength or resisting force) of the structure and the demand (stress or disturbing force) and expressed in term of Factor of Safety (FoS). The FoS calculated by this deterministic approach obviously has limitation for...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-053
..., we proposed the criterion of judging the strength of the received signal, realizing the automatic switching between frequency transducers. At the same time, the paper presents an omnidirectional detection method with no blind spot. By introducing the ultrasonic reflector, a 360-degree omnidirectional...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-064
...-slip with a linear slip-weakening law employing Barton's shear strength model. Model parametric studies with respect to d c and mining depth are performed, and seismic efficiency is computed for each model. The results show that when d c ranges from 1.0 cm to 2.5 cm, the analyses yield reasonable...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-097
... Abstract To establish a working system in field to evaluate the degree of fire-damage readily for both brittle and ductile tunnel supporting materials, this research focused on the failure characteristics and evolution on both macro-scale (stiffness, strength and toughness) as well as micro...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-035
... Abstract In Finland and Sweden, the geological nuclear waste disposal is heading for the implementation phase in the next ten years or so. In the disposal concept, the knowledge of the rock mass strength and in situ rock stresses are important for long-term safety analyses. The rock mass...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-072
... the unloading strength, deformation and crack effect for the pre-flawed specimens. Compared with intact specimens (without pre-flaws), the unloading strength of the pre-flawed specimens decreases nearly 5.5~20%, and faster unloading rates or smaller flaw inclination angles will lead to lower strength...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-055
... Abstract Strength and fracture toughness of rocks are important parameters in various fields of rock engineering application. Many researchers have reported that strength and fracture toughness of rocks increase with loading rate. The loading rate is related to time-dependent behaviors of...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-085
... in deep well drilling, and hard rock breaking. Therefore, a method of impact-shear is proposed on shale breaking. reservoir geomechanics Wellbore Design strength drilling fluids and materials relation shale gas Upstream Oil & Gas Rock mechanics specimen Science Foundation...
Proceedings Papers

Paper presented at the 4th ISRM Young Scholars Symposium on Rock Mechanics, May 10–13, 2017
Paper Number: ISRM-YSS-2017-095
..., increased due to the oxidation of lignite at decreased pH by H 2 O 2 . P-wave velocity showed positive correlations with strength, static tangent modulus, and dynamic Young's modulus. The average P-wave velocity ( V p ) decreased by about 1.5% from its initial value due to the average density decrease of...
Proceedings Papers

Paper presented at the 3rd ISRM Young Scholars Symposium on Rock Mechanics, November 8–10, 2014
Paper Number: ISRM-YSS-2014-033
... fragmentation processes like those used in tunnel boring, a modeling parameter in processes such as rock cutting and hydraulic fracturing and for the stability analysis of civil, mining and earthen structures. hydraulic fracturing fracture toughness specimen splitting loading method strength...
Proceedings Papers

Paper presented at the 3rd ISRM Young Scholars Symposium on Rock Mechanics, November 8–10, 2014
Paper Number: ISRM-YSS-2014-048
... of numerical simulation of geotechnical, mining and materials have been widely used. machine learning neural network Simulation Artificial Intelligence Upstream Oil & Gas construction materials strength network model residual variance wellbore integrity Wellbore Design GPa...
Proceedings Papers

Paper presented at the 3rd ISRM Young Scholars Symposium on Rock Mechanics, November 8–10, 2014
Paper Number: ISRM-YSS-2014-043
... higher than gravity stress. In other words, the stress in horizontal direction was higher than that in vertical direction. Reservoir Characterization strength calculation excavation Wellbore Design Chinese Journal MPa rock mass Upstream Oil & Gas roadway excavation parameter value...
Proceedings Papers

Paper presented at the 3rd ISRM Young Scholars Symposium on Rock Mechanics, November 8–10, 2014
Paper Number: ISRM-YSS-2014-013
...) monitoring test were used to analyze the failing mechanism of rocks. Also, the AE characteristics and their corresponding stress in each stage of failing process were described, so as to indicate the strength envelope of crack initiation, crack damage strength, peak strength and residential strength. At last...
Proceedings Papers

Paper presented at the 3rd ISRM Young Scholars Symposium on Rock Mechanics, November 8–10, 2014
Paper Number: ISRM-YSS-2014-093
... rock water content stability steady seepage field steady water level metals & mining strength final tertiary slope specimen Seepage Field Reservoir Characterization water level high open-pit slope Rock mechanics rainfall safety factor variation curve TransitDevelopmentinRockM...

Product(s) added to cart

Close Modal