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Keywords: amplitude
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Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0378
... temperature treatment were also subjected to the thin section analysis. Identical WG cylindrical specimens with diameter 11.5 and height 15 mm were used for UT and MIP study. UT of all specimens was made by P and S wave 1 MHz resonant frequency sensors. It was found that P-S wave velocity, amplitude...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0593
... different impact parameters were analyzed. The simulation results reveal that the impact force of two kinds of cutters increases with the increase of impact speed. The torque of PDC cutters increases with the increase of torque amplitude. Under the same conditions, the tensile damage of carbonate rock...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0147
... of spalling (or slabbing) and rockburst phenomena. Acoustic emission is a passive nondestructive technique that allows for classifying cracking modes by analyzing AE signals using mostly empirical relationships between rise time of amplitude (RA) and average frequency (AF). Using AF-RA plots for different...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0272
... fracture catalog hydraulic fracturing geological subdiscipline magnitude united states government reservoir characterization rock fracture hampton brudzinski protocol stress condition investigation constraint energy release seismicity amplitude xiong & hampton geophysical research...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0290
... the fracture. For dry limestone and granite fractures, the amplitudes of both the transmitted P- and S-waves showed a distinct peak prior to shear failure. Such peak is taken as a precursor to shear failure. However, for saturated limestone and granite fractures, the amplitude of the P-waves displayed either...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0299
.... The other aspect is the characteristics of ground motion distribution in the near-fault area, such as the distribution characteristics in peak ground velocity (PGV), peak ground acceleration (PGA), and response spectrum amplitude (Farrugia et al., 2017; Jinjun Hu et al., 2011; Mo et al., 2022). Near-fault...
Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0388
... simulate the rock-breaking of PDC cutter under vertical, horizontal, and composite impact load. The influence of the component and frequency of the impact on the rock-breaking performance and force of the PDC cutter was investigated. Lower amplitude composite impact load or only increasing vertical impact...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0409
... prediction model is proposed. The results show that when stick-slip occurs, the amplitude of triaxial acceleration vibration is larger, the power spectrum density is smaller than normal drilling, and there are apparent peaks. The triaxial acceleration is a stationary non-white noise sequence. The stick-slip...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0538
... and installation parameters of vibration drag-reduction tools is established with drag reduction efficiency as the objective function and drill string fatigue failure and hydraulic energy loss as constraint conditions. Finally, the above theoretical model is applied to practice. The results show that the amplitude...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0545
... propagation sandstone magnitude breakdown pressure fracture propagation plug fracture initiation amplitude lamination experiment fracture propagate ARMA 22 0545 Reducing Breakdown Pressure in Hydraulic Fracturing: A Novel Cyclic Injection Procedure Gang Han Aramco Americas, Houston, TX, USA Munir...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0560
... stress load on coal samples with confining pressure and the crack propagation and coal damage are detected by CT scanning technology. The coal strain amplitude-time curve indicates that there is a critical value related to the cyclic stress parameters in the transformation from cyclic hardening...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0596
... permeable reservoir vicinity discontinuous displacement deflection variation permeability fracture propagation reservoir geomechanics orientation reservoir depletion amplitude coefficient science foundation comparison ARMA 22 596 The comprehensive effects of group fracturing and depletion...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0874
... strength rotary-percussive drilling drilling operation rock mechanic association engineering consideration reservoir geomechanics amplitude displacement rock mech min sci mechanism ARMA 22 874 Numerical analyses of the granite fragmentation in rotary-percussive drilling with the consideration...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0714
... the dependence of stiffness on applied triaxial stress amplitude. Results show that for almost all tested rocks, Young’s modulus and Poisson’s ratio are dependent on stress change during triaxial loading/unloading well before reaching plastic yield. In order to study the factors influencing non-elastic processes...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0712
... the amplitude of the Lg surface waves and maximum horizontal amplitude measured by the seismograph, respectively. Moment magnitudes are inaccurate for small earthquakes (Magnitude < 3.5) and if the waveforms used in the moment tensor inversion are recorded in stations with inadequate azimuthal coverage...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2183
... ABSTRACT: Strain amplitude, frequency, stress conditions, and fluid saturation influence the stiffness response of rocks. In order to quantify the effect of frequency and strain amplitude, we performed low-frequency measurements on fully saturated Bentheimer sandstone samples to measure...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2106
... the cutting angle, the more complicated the relationship between the cutting force amplitude and the cutting depth, from linear relation to quadratic and cubic functions. Meanwhile, the mechanical specific energy for rock-breaking remains at a small level in a cutting angle range of 10 to 20 °. Compared...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0427
... macropore nmr curve continental sedimentary tight reservoir comparison petrol amplitude guar gum mesopore residue agent experiment mineral ARMA 22 427 Damage Assessment of Fracturing Fluid in Continental Sedimentary Tight Reservoir Based on NMR Technology Runzi, Xu1, Shenglai Yang 2, Beidong...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0145
..., the chamber pressure, the total normal load, the shear load and the slip displacement were monitored. During the tests, continuous pulses of P-and S-waves were transmitted through the specimen and the amplitudes of the transmitted and reflected waves were recorded. The paper provides results of the mechanical...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0063
... amplitude zang ARMA 22 63 Microscale observations of hydraulic fractures in Gonghe granite subjected to low- and high-cycle fatigue experiments Zhuang, L. Korea Institute of Civil Engineering and Building Technology, Goyang, Gyeonggi, Republic of Korea Zang, A. Helmholtz Centre Potsdam GFZ German...

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