For the purpose of investigating influence fine contents on dynamic properties mixed soil, a series triaxial tests were conducted gravelly soil with contents. The confining pressures 100, 150, and 200 kPa selected. carried out samples 0%, 20%, 40% respectively. axial strain pore water pressure curves specimens obtained when different excitation forces applied. experimental results indicated tha...

The gas in a coal seam is clean energy source, but it also the main cause of accidents during mining mineral resources. There large pressure–relief influx upper and lower adjacent layers 1211 working face Wanfeng Coal Mine Jinhui, Shanxi Province, China. Based on evolution law overburden fractures, collaborative extraction mode “directional drilling gas-conducting fractured zone + staggered bur...

Advanced therapeutic endoscopy, in particular endoscopic mucosal resection, endoscopic submucosal dissection, per-oral endoscopic myotomy, submucosal endoscopic tumor resection opened a new era where direct esophageal visualization is possible. Combining these information with advanced diagnostic endoscopy, the esophagus is organized, from the luminal side to outside, into five layers (epitheli...

A 2D numerical simulation of the drainage process in a stratified vertical porous channel is performed for different gas flow rates. The porous matrix consists of two cylindrical homogeneous layers of packed sand with different permeability, initially saturated with a wetting phase. The porosity and the permeability of each layer are assumed to be constant. Since the injected gas is provided th...

â â â  in the last years, have been accelerated increased the damages of landslides by natural and anthropogenic factors. one of the main solutions to decrease landslide hazards is avoid from prone areas. for this purpose, it is necessary to prepare the landslide susceptibility map. in this research, after field studies in the ilam dam basin, nine factors including slope gradient, aspect, eleva...

Clogging of the landfill drainage layer leads to a high leachate head developing over bottom liner, which increases risk leakage. Estimation maximum in is great significance pollution control liners. In this study, simplified model considering development clogging established through assuming spatial and temporal distributions landfill. The calculation results are compared with previous study v...

The effect of the incubation of zinc (Zn) applied to the soil on Zn uptake and the Zn concentrations in chemical extractants was studied. In a glasshouse experiment using a Zn-deficient gravelly sandy loam, the effect of recently applied Zn was compared with that of Zn incubated with the soil for 15 days at 40°C on growth and Zn uptake by navy beans (Phaseolus vulgaris cv. Gallaroy). At the sec...

A leaching experiment using a mixture of five REE oxides and gravelly, sandy loam soils was conducted to examine the applicability of the REE oxides as a sediment tracer for coarse-textured soils. The experiment showed little leaching of the oxides and an enrichment of various size classes of soil particles with the oxides, which reflected the strong binding capability of the REE oxides with th...