This work presents a model for calculating the effective ‎thermal conductivity of nanofluids. The proposed model ‎includes the effects of nanoparticles and thermal conductivity ‎base fluid.We will focus on experimental of the volume ‎concentration parameter and temperature on thermal ‎conductivity, nano-fluid combination and Multi-Walled ‎Carbon nanotubes-Oxide / Copper-paid deionized Water. T...

Due to its excellent effect of surface subsidence reduction, the overburden-separation grouting (OSG) technology has been widely applied green mining. However, OSG changes mine pressure, and resultant gas emission in stope remains unclear. Therefore, with 22301 working face Tunlan Coal Mine as an example, overburden deformation stress distribution absence presence were studied through numerical...

In order to analyze the deformation of old goaf in Dameidong Coal Mine and its influence on surrounding rock soil layer, it provides guidance for prevention control geological disasters region. this paper, transient electromagnetic method numerical simulation were used study law overlying strata mining area. The results detection showed that subsidence area was within range elliptical water-ric...

abstract information on spatial and temporal variations of soil hydraulic conductivity (k) is essential to improve soil and water management. however several techniques have been proposed for measuring of soil hydraulic conductivity above water surface table, but reliability and easy use of these methods in various conditions were always concern for engineers. the purposes of this study are mea...

physical modeling for study of deep foundations can be performed in simple chambers (1g), calibration chambers (cc), and centrifuge apparatus (ng). these common apparatus face certain limitations and difficulties. recently, frustum confining vessels (fcv) have been evolved for physical modeling of deep foundations and penetrometers. shaped as the frustum of a cone, this device applies steady pr...