Mudstone, whose significant characteristic is water-weakening, widely exists in all kinds of geotechnical engineering, which brings great security risks to engineering safety. In this paper, through a series macro and meso test methods, the action mechanism water on weakly consolidated plane mudstone was studied. uniaxial compressive strength test, cementation main part fracture derived. Under ...

The crack propagation evolution of carbonaceous mudstone under the action dry-wet cycles is an important cause unstable failure this type slope. This paper attempts to reveal mechanism mesocrack and macrocrack in from chemical, physical, mechanical perspectives. Firstly, soaking solution during was extracted for ion concentration test analyze chemical reactions mudstone. Then, CT scans were per...

The transition between the two structural regimes of the Walker Lane and the Basin and Range allows for complex transtensional fault interactions. NWtrending dextral shear in the Walker Lane and WNW extension in the northern Great Basin imparts enhanced extension and pull-apart basins that bring about structural controls for geothermal systems. The Carson Sink is the surface expression of this ...

Rhythmic sandstone-mudstone-coal succession of the Barakar Formation (early Permian) manifests a transition from lower braided-fluvial to upper tide-wave influenced, estuarine setting. Monospecific assemblage of marine trace fossil Chondrites isp. in contemporaneous claystone beds in the upper Barakar succession from two Gondwana basins (namely, the Raniganj Basin and the Talchir Basin) in east...

The leaching behavior of arsenic and boron is evaluated in this work through two types excavated rocks with geogenic contaminants under different temperatures. Excavated are expected to be used embankments appropriate countermeasures being taken against the risks brought about by contamination. might change because changes ground temperature. However, effects temperature on such have not been w...

Diagenetic models for silt-rich mudstone (siltstone) are less advanced than those sandstone and clay-rich mudstone. In addition, the influences of diagenetic processes on reservoir quality in siltstone formations poorly understood. Here we examine roles depositional facies, detrital composition, compositional evolution Lower Triassic Montney Formation, a prominent siltstone-dominated western Ca...

In recent years, lithologic oil and gas reservoirs have become an important target in continental hydrocarbon-bearing basins. Geophysical prospecting technology using seismic data is indispensable tool for exploration. However, while previous work has paid much attention to the responses of (sandstones), depositional sequences composed sandstone–mudstone cycles are not well understood reservoir...

Coal-bearing rocks are inevitably exposed to high temperatures and impacts (rapid dynamic load action) during deep-earth resource extraction, necessitating the study of their mechanical properties under such conditions. This paper reports on compression tests conducted coal-bearing mudstone specimens at real-time (the temperature rock remains constant throughout impact process) ranging from 25 ...