This paper reviews commonly used parameters and prediction models for assessing the permeability of granular soils. Following a review published soil permeability, dimensional homogenous transformation model a-priori estimation was calibrated using large database (CG/KSAT/7/1278) comprising data wide range soils sourced from over 50 publications. The new requires knowledge void ratio gradation ...

a‎s we know, developing mathematical models and numerical procedures that would appropriately treat and solve systems of linear equations where some of the system's parameters are proposed as fuzzy numbers is very important in fuzzy set theory. for this reason, many researchers have used various numerical methods to solve fuzzy linear systems. in this paper, we define the concepts of midpoint a...

Experiments were performed to ascertain the single!phase heat transfer enhancement provided by streamwise curva! ture[ Curved and straight rectangular ~ow channels were fabricated with identical 4[9×1[4 mm cross!sections and 090[5 mm heated lengths in which heat was applied to a 21[2 mm radius concave wall in the curved channel and a side wall in the straight[ Reynolds number ranged from 8999 t...

Abstract The bending behavior of the hydraulic pipeline on roller logging winch will cause a certain plastic deformation pipeline, which has influence its performance. In view above problems, this paper uses finite element analysis software to analyze law pipelines under different radii. It can be found from results that during process, metal continuous capillary gradually increases with neutra...

Abstract This study aimed to solve the problem ignored by previous research on hydraulic flushing gas extraction technology regarding strain-softening of surrounding rock. Firstly, through analysis experimental data, studies have proved that essence is internal friction angle remains unchanged while cohesion decreases. According variation law rocks in a borehole, we theoretically analyzed stres...

Narrabri Coal Operations is longwall mining coal directly below a 15 to 20 m thick conglom‐ erate sequence expected to be capable of producing a windblast upon first caving at longwall startup and producing periodic weighting during regular mining. Site characterisation and field trials were undertaken to evaluate hydraulic fracturing as a method to precondition the conglomerate strata sufficie...