Results of theoretical, laboratory and stand study which enabled to recommend solutions of surface active substances while well drilling, taking into account mining and geological conditions of a number of Ukrainian regions are given. It was determined that addition of surface active substances to the drilling fluid during rotary drilling by hard-face and diamond cores makes it possible to increase drilling rate.
The paper represents the results of monitoring and evaluation of the efficiency of hydroimpulsive disintegration of outburst-prone coal seams in the stopes of development mine workings using a system of sound detecting facilities. Methods of acoustic emission control have been considered as well as the monitoring tasks to evaluate rock mass conditions before the procedure and after it inclusive of the results of sound accompaniment of hydraulic disintegration of the coal seam. It has been determined that the higher concentration of stresses within the rock mass is, the more efficient action of high frequency self-oscillations of cavitation transmitter is on both the fissuring and changes in gas-dynamic state of the coal seam. It has been recommended to apply a mode of impulsive fluid pumping under the conditions where coal seam is in the stress-strain state.
The article has developed a project for the reconstruction and recultivation of the Gusinobrodsky solid municipal waste landfill to create a complex system for the processing, utiliza-tion and disposal of the ballast of municipal solid waste. New, environmentally friendly and cost-effective areas have been selected to provide a modern system for the management of municipal waste.
ВведениеВ практическом отношении основными эконо-мически приемлемыми и наиболее освоенными на данный момент источниками рения являются про-дукты и полупродукты, полученные при переработ-ке молибденитового и медного сульфидного сырья [1][2][3][4] Для извлечения рения из многокомпонентных серно-кислотных растворов опробованы образцы низкоосновных анио-нитов Cybber с различными функциональными группами и типом матрицы. Установлено, что анионит SX002 проявляет повышенную емкость при сорбции из растворов с низким содержанием Re, а ALX220 применим для извлечения Re при его высоких концентрациях в растворе. Ионный фон технологического раствора оказывает влияние на емкость сорбен-тов по рению. При изучении кинетических характеристик выявлено, что процессы сорбции на ионитах лимитируются внутренней диффузией. Проверка ионитов на технологических Cr-содержащих растворах свидетельствует о возможности применения анионитов ALX220 и SX002 для извлечения рения.Ключевые слова: рений, сорбция, Cybber, серно-кислотные растворы.Low-basic Cybber anionites with various functional groups and matrix type are tested for recovery of rhenium from multicomponent sulfuric acid solutions. It is established that anionite SX002 manifests an increased capacity during the sorption from solutions with a low Re content, while anionite ALX220 is applicable to recover Re at its high concentrations in the solution. The ionic background of the industrial solution affects the capacity of sorbents with respect to rhenium. When studying the kinetic characteristics, it is revealed that sorption processes on ionites are limited by the internal diffusion. The tests of ionites as applied to Cr-containing solutions indicate the possibility of using anionites ALX220 and SX002 to recover rhenium.
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