This study is an investigation of the effect high temperatures on engineering properties sandstone. The rock was first subjected to a range such as 25 °C, 200 400 600 °C and 800 series porosity, unconfined compression, X-ray diffraction scanning electron microscope tests were then performed heated specimens. In addition, sandstone specimens also different numbers (i.e. 1, 2, 4, 6 10) thermal cy...

Hydraulic fracturing of a roof can attenuate the strong mineral pressure and stress transfer by creating series parallel artificial fractures in it, different forms hydraulic have effects on attenuation effect coal rock system. In this regard, study investigated influence law pre-cracks mechanical properties rock–coal combined body through PFC2D numerical simulation, following conclusions were ...

Viruses are compact biological nanoparticles whose elastic and dynamical properties are hardly known. Inelastic (Brillouin) light scattering was used to characterize these properties, from microcrystals of the Satellite Tobacco Mosaic Virus, a nearly spherical plant virus of 17-nm diameter. Longitudinal sound velocities in wet and dry Satellite Tobacco Mosaic Virus crystals were determined and ...

Crack propagation leads to rock instability and failure, which seriously influence the safe efficient operation of coal mines. According characteristics fracture development expansion, this paper takes a fractured with different crack numbers as research background studies effects grouted arrest measure, anchored measure on mechanical properties, energy evolution, progressive rock. The sensitiv...

Understanding how geophysical and hydrologic properties are related is a key problem in hydrogeophysical data fusion. Traditionally this link has been made by rock physics investigations that define how pore-scale variations in properties like mineralogy, fluid content, and grain geometry affect the geophysical response of a rock or sediment. As the scale of investigation increases from the lab...

Data on discontinuities are always necessary for design, characterization and analysis of rock structures. The time honored method of manual measurements with Brunton compass is both time consuming and often inconvenient given issues such as restricted access to measurement areas, introduction of erroneous data due to sampling difficulties and human bias, considerable safety risks since measure...

Microrheological studies of givpan-based gel-forming solutions in micron-sized pores have shown that contact interaction the fluid–rock formation system leads to structural and mechanical colmatation porous medium, blocking pore channels by elastic-viscous filtrate plugs, which under normal conditions exhibit viscoplastic qualities. It is these processes develop immediately upon with surface, d...

Gas hydrates are considered a potential energy source for the future. Rock physics modeling provides insights into elastic response of sediments containing gas hydrates, which is essential identifying using well-log data and seismic attributes. This paper establishes rock model (RPM) by employing effective medium theories to quantify properties hydrates. Specifically, proposed RPM introduces cr...