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 ...

This study was designed to examine the characteristics of sawdust and cocopeat bedding materials, including physicochemical properties (Exp. I) and on-farm trial (Exp. II). In Exp. I, the proportion of particle size was in the order of sawdust> cocopeat India>cocopeat Vietnam (p<0.05), and cocopeat contained higher proportion of small particles (250 μm+below 250 μm) than sawdust, causing a dust...

A heterolithic tidalite succession yielding spring–neap bundles is newly reported from a mid-Carboniferous (Serpukhovian) section of the Alston Formation Northumberland, England. The rhythmite records deposition over an interval that can be confidently calibrated to at least 84 lunar days, and attests non-negligible tidal range in parts Northwest European Seaway late Mississippian. notable for ...

Received: August 15, 2016 Revised: January 11, 2017 Accepted: February 14, 2017 Abstract: Background: Since the fragile anisotropy of shale, it is difficult to carry out laboratory experiments of geostress by shale cores. The existing geostress calculation model that is based on the homogeneous hypothesis also cannot meet the accuracy requirement. Therefore, it is necessary to establish the new...

The use of non-slip surfaces during loading and unloading of finishing pigs plays an important role in animal welfare and economics of the pork industry. Currently, the guidelines available only suggest the use of ramps with a slope below 20 degrees to load and unload pigs. However, the total time it takes to load and unload animals and slips, falls, and vocalizations are a welfare concern. Thr...

Experimental studies were conducted on the changes of the potential differences in different directions during the uniaxial compression on limestone samples parallel and normal to the bedding plane. In the test, electric current was supplied at both ends of the samples, and concurrent measurement was conducted in four measuring lines at a 45-degree angle to each other. First, the change laws of...

an experiment was conducted to evaluate the effect of chemical amendments and reused litter on broiler performances, immune response and skin quality. five hundred and seventy six (576) day old broiler chickens were randomly allocated to 3x2 factorial design experiment. three amendments treatment included control (no chemical addition), alunminum sulfate and zeolite; two types of litter were ne...

Coal permeability data are critical in the prevention and control of coal gas outbursts mines an important reservoir parameter for development coalbed methane. The mechanism by which is affected pressure complex. We used a self-developed true triaxial seepage experimental device that collects lignite anthracite samples, sets fixed axial confining pressure, changes changing orientation seam to s...

Abstract Radial drilling-fracturing, the combination of radial drilling and hydraulic fracturing, can guide fractures toward target area effectively enhance recovery low permeable reservoir. In this paper, based on stress superposition principle, we establish an analytical model to predict fracture initiation pressure (FIP) shale failure mode for drilling-fracturing applied in formations. contr...