and Nature Resources use Sobornaya str., 11, Rivne, Ukraine, 33028Досліджені основні закономірності про-цесів видобутку бурштину на денну поверх-ню з піщаних бурштиноносних родовищ гід-ромеханічним способом із застосуванням інтенсифікаторів та запропонована нова технологія з вибором раціональних пара-метрів видобутку. Встановлені закономір-ності впливу води і повітря на розріджен-ня піщаних середовищ, які залежать від інтенсивності подачі в бурштиноносний масив газорідинної суміші Ключові слова: бурштин, зрідження, сегрегація, гідромеханічний спосіб, вібро-гідравлічний інтенсифікатор, вібровипро-мінювач Исследованы основные закономерно-сти процессов добычи янтаря на дневную поверхность из песчаных янтареносных месторождений гидромеханическим спо-собом с использованием интенсифика-торов и предложены новые технологии с выбором рациональных параметров добы-чи. Установлены закономерности влияния воды и воздуха на разжижение песчаных сред, которые зависят от интенсивности подачи в янтареносный массив газожид-костной смеси Ключевые слова: янтарь, ожижение, сегрегация, гидромеханический способ, виброгидравлический интенсификатор, виброизлучатль UDC 622.232.5:622.2

Purpose is to analyze the efficiency of hydromechanical amber extraction from sandy deposits relying upon the determined regularities concerning the effect of parameters while carrying out a series of laboratory tests and fullscale experiments.Methods. Laboratory tests and full-scale experiments (Volodymyrets amber-bearing deposit, village of Berezhnytsia) were carried out to analyze effect of the parameters of a hydromechanical technique on the velocity of amber extraction. The experiments also involved studies of occurrence medium; in this context, boiling process was modeled; and factors and parameters effecting suspense medium formation were researched. Methods of mathematical statistics were applied to obtain dependences describing mining parameters effect on amber extraction velocity.Findings. Basic parameters of hydromechanical technique, effecting amber extraction velocity, have been determined. Efficient values of air supply to provide maximum velocity of amber floating have been identified. Mathematical dependences, determining amber floating velocity depending upon air supply and mechanical effect frequency, have been obtained. In this context, amber production capacity is 90 to 95%. Basic parameters effecting amber mining (i.e. environmental density; amplitude of oscillations and their frequency; and water and air supply to sandy deposit of amber-bearing sand) have been defined.Originality. It has been first proved that amber floating velocity is of polynomial nature dependence upon environmental density where extremum is with 0.004 -0.006 m 3 /h air supply value; amber extraction experiences 2 -3 times intensification, if environmental density (ρ c ) is 1670 -1750 kg/m 3 , oscillation frequency is 26 -36 Hz, amplitude is A = 1.0 -2.4 mm, and air supply is q a = 0.004 -0.006 m 3 /h. In this context, amber floating (v) is 0.09 -0.12 m/s. If air supply is more than q a = 0.020 m 3 /h, amber extraction process stops. It has been first obtained polynomial dependence of amber flotation on oscillation frequency of operating device as well as on air supply to rock mass. Practical implications. The determined regularities of hydromechanical amber extraction from amber-bearing sand help make calculations, and select facilities for hydromechanical amber mining.

The article deals with the method of hydromechanical extraction of amber from sand deposits. The essence of hydromechanical method of amber extraction is considered. The process of extraction has been identified. The analytical expressions obtained for calculating the parameters of hydromechanical extraction of amber from sand deposits, and in particular the expression for determining the rate of emergence of an amber particle, can be used in the further engineering calculations of process parameters and process equipment. These expressions will allow to accurately substitute and with sufficient accuracy to calculate the parameters of the process of extracting amber from amber-containing deposits, as well as to set the parameters of technological equipment for the implementation of this process. MethodsThe northern regions of the Rivne region are characterized mainly by the occurrence of amber in sandy soils, characterized by water and air pores present

The article contains materials for the analysis of control systems for the process of providing conditions for storage of fresh fruits and vegetables. The analysis reveals the shortcomings of existing management systems and outlines ways for further development.

Purpose. To develop a mathematical model for a system of amber extraction based upon physical cumulation and deflation effects under the conditions of turbulent flows. Methodology. Theoretical simulation of the extraction processes took into consideration use of a basic aggregate, converting processes, compounding processes, modification processes, aggregating processes, processes of rotation series development involving practices of design and operation of the available similar facilities, design solutions, and widespread unification of both components and assembly units. Analysis of the gained theoretical and practical experiences helped simulate processes of amber extraction from sandy and clay rocks with stope filling. Findings. Rock mass loosening by means of hydromonitor jets, operating tangentially in a casing while developing swirling pulp flows, has been simulated mathematically. A procedure to prepare filling material from mine tailing by means of a preparator, located within a settling pond, has been substantiated. The research, concerning mineral disintegration, has helped identify that the average value of the maximum deflector radius, shaped as a result of counter jetting action, is Rmax = 0.30.5 m; at the same time, the average value of the maximum radius of a hole, shaped resulting from helical jetting action around suction pipe, is Rmax = 0.3m. Originality. For the first time, a mathematical model to use cumulation and deflation effects for a mineral disintegration has been developed as well as for preparation of filling material from mine tailing. The model reflects twists of helical 6585 jetting action with the maximum 0.5 m deflector radius and development of turbulence improving stope filling efficiency. Practical value. The proposed procedure is the theoretical background to develop automated system of amber extraction from sandy and clay rocks, which will improve productive capacity of the mining process substantially.