[en] An inflatable cushion assembly for use with an inflator comprises an inflatable cushion having an inner surface, outer surface, and at least one protrusion extending from one of the inner or outer surfaces. The inflatable cushion defines an opening between the inner surface and the outer surface for receiving the inflator. An attachment member contacts the one of the inner or outer surfaces adjacent the opening and includes a groove for receiving the protrusion, the attachment member securing the inflator within the opening. 22 figs

[en] The authors have used 12 megamp, 5 megajoule axial discharges to electromagnetically implode tapered thickness spherical aluminum shells, achieving peak implosion velocities above 20 km/sec inner surface, 10 km/sec thickness averaged. The shell thickness was proportional to the inverse of the square of the cylindrical radius. This causes the ratio of magnetic pressure to shell areal mass density (and spherical acceleration) to be independent of polar angle, so that the spherical shape is nominally maintained during the implosion. The authors have used these implosions to compress hot hydrogen plasmas with initial pressure about 100 atm and initial temperature above 1 eV. The hot hydrogen plasmas were injected beforehand using 1 megamp, 100 kilojoule range co-axial gun discharges through a circular array of vanes to strip away magnetic field. The imploding shell and the compressed hot hydrogen working fluid's effect on a diagnostic compression target were observed with radiography. Interior magnetic probes and auxiliary shots without working fluid injection were used to confirm that there is no magnetic field interior to the imploding aluminum shell. Thus, diagnostic target compression, which was observed in working fluid compression experiments, was presumably due to the compressed hot hydrogen pressure

[en] When gas is suddenly injected from a nozzle into a stationary liquid in a horizontal circular pipe, a thin liquid film is left on the wall after the passage of the interface front. The residual liquid film thickness in the case of the progress of the interface front at constant velocity is studied. The liquid film thickness quickly decreases and approaches an asymptotic value immediately after the front passes measured point and it decreases slowly after that. For low or high front velocity, the asymptotic value is almost constant regardless of the front velocity. For middle front velocity, it increases with the front velocity and depends on the capillary number. The asymptotic thickness agrees well with modified Bretherton's equation derived by replacing the inner diameter of the pipe by a virtual diameter. The limit front velocity to which the modified Bretherton's equation is applicable, depends on the Reynolds number, which the virtual diameter or the thickness of gas bubbles is used as the characteristic length. (author)

[en] Flow injection analysis (FIA) is a chemical auto-analysis technique, which was developed very quickly in last twenty years. The author reviews FIA method of determination and preconcentration and separation, development trend of FIA apparatus, application in uranium analysis, and proposes some important problems that have to be studied hereafter in the application of uranium analysis, so as to push the technique for uranium analysis forward

[en] The author establishes specific requirements for heap construction by blasting on the basis of the mechanism for in situ leaching of blasted ore, analyses the feasibility of heap construction by long hole blasting, selection of the blast plan and the relevant technological problems, and gives a case of heap construction by long hole blasting in Renhua uranium mine

[en] The effect on the packed amount of explosive is discussed and the practical way has been gotten for calculating the packed amount of explosive, which is influenced by the magnitude of compensatory space, the free side for blasting and the loose coefficient of rock as using small compensatory space extruding blast to crack ores for heap in stope leaching

[en] Remediation of underground mines can prove to be a difficult task, given the physical constraints associated with introducing amendments to a subterranean environment. An acid mine abatement project involving in-situ chemical treatment method was conducted by the University of Oklahoma. The treatment method involved the injection of an alkaline coal combustion by-product (CCB) slurry into a flooded mine void (pH 4.4) to create a buffered zone. Injection of the CCB slurry was possible through the use of equipment developed by the petroleum industry for grouting recovery wells. This technology was selected because the CCB slurry could be injected under significant pressure and at a high rate. With higher pressure and rates of injection, a large quantity of slurry can be introduced into the mine within a limited amount of time. Theoretically, the high pressure and rate would improve dispersal of the slurry within the void. In addition, the high pressure is advantageous in fracturing or breaking-down obstructions to injection. During the injection process, a total of 418 tons of CCB was introduced within 15 hours. The mine did not refuse any of the material, and it is likely that a much larger mass could have been added. One injection well was drilled into a pillar of coal. Normally this would pose a problem when introducing a slurry; however, the coal pillar was easily fractured during the injection process. Currently, the pH of the mine discharge is above 6.5 and the alkalinity is approximately 100 mg/L as CACO₃

[en] The results of experimental research of hydrogen explosions in small volume are presented. Dependence of hydrogen-oxygen mixture volume influence and its humidity on explosion amplitude are shown. Comparing of the experimentally measured values of explosions power is executed to energy of chemical reaction of explosion. Impossibility of direct transfer of results of experiment on the real objects is shown

[en] Full text: Imaging plate (IP) is an ionizing radiation detector using a photo-stimulated luminescent (PSL) phosphor (BaFBr:Eu²⁺) crystal. Radiation source for the imaging plate study were Eu-152, S-35 and Am-241 for gamma ray, beta ray and X ray source respectively. Characteristics of photo-stimulated luminescent of IP, such as radiation sensitivity, PSL fading and radiation backscattering of Fuji BAS-MS IP signal were investigated using an IP reader. The PSL signal intensity of IP was proportional to the radiation dose. The exposed IP signal faded away rather quickly as time elapsed

[en] If yield (>75%) of <150mm ore partical size is used as evaluation criteria of constructed heap effect in stope leaching operations, all stope leaching operations are successful. But, which is the best? We do not know. A new evaluation method is proposed, that is using d_75%(screen size of 75% ore passing) as evaluation criteria. The effect of constructed heap in different stope leaching operations can be evaluated by this method, and we can know which of these operations is the best. (authors)