numerical methods such as boundary element and finite element methods are widely used for the stress analysis in solid mechanics. this study presents boundary element method based on the displacement discontinuity formulation to solve general problems of interaction between hydraulic fracturing and discontinuities. the crack tip element and a higher order boundary displacement collocation techn...

Groundwater is an important resource that can be used for various purposes. Various factors change the chemistry of GW, such as chemical composition aquifer well leaching human waste into groundwater. The study area a barren land covered by some sabkhas, in addition to agricultural fields. aims assess groundwater quality drinking purposes using Water Quality Index. chemically heterogeneous and ...

Water inrush disaster is an important factor in restricting safe production of the coal mine. Taking the roadway in seam in Danhou Coal Mine, as the engineering background, according to the spatial relationship of the roadway, the impermeable layer, the fault and the loading conditions, the fault activation mechanical model under the roadway excavation disturbance was built, and the fault activ...

When performing experimental work to study the recovery of NAPLs (non aqueous phase liquids) from porous media by water flood, scaling seems to be a critical step in the production of useful data that can be obtained from lab experiments. During many years, scaling was a very common technique in the petroleum industry. This technique was highly developed in the oil field in order to achieve gre...

Abstract Groundwater in volcanic areas flows from the recharge to discharge, and dissolving rock minerals undergo hydrochemical changes. Anthropogenic influences form of increasing built-up land plantation activities upstream raise concerns about changes groundwater hydrochemistry. Hydrogeochemical environmental characterization regions is essential trace rock-water interaction. This study aime...

RhoE belongs to the Rho GTPase family, the members of which control actin cytoskeletal dynamics. RhoE induces stress fiber disassembly in a variety of cell types, whereas RhoA stimulates stress fiber assembly. The similarity of RhoE and RhoA sequences suggested that RhoE might compete with RhoA for interaction with its targets. Here, we show that RhoE binds ROCK I but none of the other RhoA tar...

In this chapter possibilities of the improvement of drilling tool efficiency on the basis of the analysis of mechanisms of rock destruction and some methods of the information theory are considered. Physical mechanisms of destruction of hard and plastic rocks under different conditions of mechanical loading are reviewed. Some physical effects which allow to improve the efficiency of rock drilli...

The paper examines the interaction between host rock and a clay-based engineered barrier in the context of deep underground disposal of high-level radioactive waste. A large scale ‘‘in situ’’ heating test currently under way in the underground Grimsel Rock Laboratory (GRL; Switzerland) is adopted as a representative case for study. The main features of the behaviour of the rock/barrier system h...