This paper is a study of the dynamic mechanics and energy dissipation saturated layered phyllite. Using Split-Hopkinson pressure bar system, mechanical properties law sample during loading in test were analyzed. The results show that weakening effect water on phyllite rock body will have great impact its properties, strain rate sensitivity damage mode, fracture dissipation. values parameters su...

Spectral, angular, and temporal distributions of fluorescence as well as specular reflection were investigated for silica-based artificial opals. Periodic arrangement of nanosized silica globules in the opal causes a specific dip in the defect-related fluorescence spectra and a peak in the reflectance spectrum. The spectral position of the dip coincides with the photonic stop band. The latter i...

Analytical solution for the problem of a surface-breaking long strike-slip fault in an elastic layer overlying an elastic half-space is well known. The purpose of this note is to obtain the corresponding solution for a blind fault. Since the solution is valid for arbitrary values of the fault-depth and the dip angle, the effects of these two important fault parameters can be studied numerically...

Tight sandstone reservoirs, as typical unconventional have attracted more and attention worldwide. Compared to conventional the complex microscopic pore structures micro-fractures of tight reservoirs are developed, fluid flow in reservoir is very complicated. Therefore, studying influence fractures on rock topological structure characteristics between matrix critical development reservoirs. In ...

fracture system in carbonate reservoirs is very complex. understanding the features of fractures such as dip, strike and the other parameters can help to distinguish the behaviour of reservoir in any exploration and production plan. image log is the best way to investigate feature planes like fracture and bedding. image log in one of drilled well #10x393 of bangestan reservoir in gachsaran oilf...

The progressive collapse behavior and energy release of columnar jointed basalts (CJBs) can be greatly influenced by different joint distance ratios. By adopting the digital image correlation, a series heterogeneous CJB models are established. continuous fracture process acoustic emissions (AEs) captured numerically under varying lateral pressures. load curves ratios model boundaries analyzed. ...

The analysis of mechanical response and deformation-cracking behavior contributes to the high-efficiency extraction geo-energy long-term safety underground engineering structures. Compared natural cores, properties 3D-printed samples made from quartz sand as raw material are relatively homogeneous, can be used for quantitative studies on influence defects rocks. In this work, with single fractu...

For the study of driving forces behind fault activation and its influencing factors on barrier effect rock mass movement under influence mining, discrete element numerical simulation software 3DEC was used for analysis impact distance to mining area from fault, buried depth upper boundary dip angle size thickness zone respectively. The results show that areas are closer as distances decrease, b...

Scanline observation is known to introduce an angular bias into the probability distribution of orientation in three-dimensional space. In this paper, numerical solutions expressing the functional relationship between the scanline-observational distribution (in one-dimensional space) and the inherent distribution (in three-dimensional space) are derived using probability theory and calculus und...

Avulsion injury of the flexor digitorum profundus (FDP) with concomitant fracture of the distal phalanx dorsal base is uncommon. Simultaneous avulsion fractures of the insertion of this tendon associated with rupture of the tendon from the bony fragment and combination with dorsal base fracture is very rare and also complicated. A 36- year- old man fell and injured his right little finger. FDP ...