Purpose. The identification of geomechanical problems of mining industry wastes accumulation and substantiation of the ways for their solution with the possibility of processing the watery technogenic feedstock by fine classification with dewatering. Methods. To achieve this purpose, an integrated approach is used in this work, which includes the scientific and technical analysis of research according to wastes accumulation, state statistics data, analytical studies of the strata compaction ratio of aqueous rocks, affecting the subsidence of the earth surface. This also includes the bench experimental studies to establish the dependence of changes in moisture content and the extraction of fine classes in screened products depending on the screening time at shock-vibrating screening by a new method for separating the enrichment wastes before to stockpile them into a pond.Findings. The developed mathematical apparatus has been proposed for determining the parameters of geomechanical processes in technogenic massifs. It has been shown that in order to reduce the technogenic load and manifestation of negative geomechanical processes, it is necessary to reduce the area of land under the waste ponds and the accumulated volumes themselves of mining and enrichment wastes. The dependences have been established of the preliminary enrichment complex on the qualitative parameters of the feedstock and the technological parameters of the equipment. It has been revealed that the mineral stock, formed from wide grain-size classes with a high content of particles less than 0.2 mm, is dewatered up to 18 -22% by traditional methods and is practically not classified.Originality. A mathematical model has been proposed of screening and dewatering kinetics, which takes into account comprehensively the initial distribution of particles and liquid throughout the height of the screened material layer, segregation, mixing, sifting, vibrational transportation features (rate, multiplicity and number of falls over the period of vibrational transportation) and change in the height of the layer. This model is different due to the account of the mutual influence of classification by coarseness and dewatering.Practical implications. The represented dependences can be used to predict the development of negative geomechanical processes. The obtained results make it possible by means of a calculation to determine rational parameters of the screen and screening process with dewatering at processing of various feedstock with the use of initial data. The use of technology, which includes a fine classification in wastes processing, will allow: increase the economic efficiency of enterprises; to expand the feedstock base for construction, coke and chemical industries and power industry; to solve the problems of creating additional containers for storing the wastes; to improve significantly the environmental situation in the mining and processing regions.

Purpose. Basing on the instrumental surveying measurement, to determine the rate of tensile strain displacements in the rock mass, and to use the obtained data for controlling rock pressure and ensuring job safety.Methods. The rate of deformation development in different types of rocks was defined on the basis of statistical processing of the surveying monitoring results applying the theory of layer-by layer block rockfall. Findings.Results of the instrumental surveying monitoring of the rock mass and surface displacements were generalized, and on their basis, the rate of deformation displacement was determined. Interdependence between the rate of deformation displacement, velocity of the stope advance, depth of mining and height of sheeted zone was specified. Taking into account parameters of the dynamic displacement trench, the volume of destroyed rocks was determined, which manifested itself as rock pressure.Originality. It is for the first time when, on the basis of instrumental observations, the rate of the tensile strain displacement in the rocks with varying degrees of lithification was defined. The height of sheeted zone in the undermined mass was determined on the basis of the established interdependence between the rate of deformations displacements, stope advance velocity, and the step of the main roof rock fall. The value of the sheeted zone height determines the value of the rock pressure. Practical implications.The obtained data about the velocity of deformation displacement in the undermined rock mass allow to control rock pressure and improve efficiency of mining operations and their safety.

Over the past 20 years, the parameters of the working zone of deep quarries have changed, which began to consist of sections of inclined and steep sides. At a number of deep iron ore quarries, temporary internal dumps of overburden rocks began to be created in the working area, which influences the choice of schemes for opening deep horizons in cyclic-flow technology (СFT). The purpose of the study is to substantiate promising directions for the development of CFT in deep iron ore quarries, taking into account the structure of their working area and the use of steeply inclined conveyors (SIC). It is shown that with certain parameters of a large piece transported by the conveyor belt, contained in the transported rock mass, and its certain kinetic energy, stable operation of the system, widely used steeply inclined and inclined conveyors, is achieved. The parameters of a steeply inclined conveyor when transporting rocks with a high density were determined. It is assumed that with the same kinetic energy of a piece (ore, rock) contained in the transported rock mass, stable operation of a steeply inclined conveyor will be ensured. Based on this, the parameters of the transported piece and the parameters of the steeply inclined conveyor are determined. According to the maximum size of the pieces that come after crushing in a cone crusher for coarse crushing on a steeply inclined conveyor, its stable operation is ensured at a density of transported rocks of not more than 2.8 t/m3. The economical use of SIC is achieved by combining the cyclic-flow technology with SIC and with the technology of pre-enrichment of ore in a quarry. For these conditions, the use of cyclic-flow technology with steeply inclined and inclined conveyors is justified. The structure of the working zone of a deep quarry with gentle and steep sides is considered. For these conditions, rational schemes for the opening of horizons with steep sides of the open pit and the use of temporary internal dumps was developed. The depth of the quarry, at which it is necessary to introduce a new opening scheme, was established. It is shown that the time of transition to the next opening scheme is significantly affected by the productivity of the quarry and the rate of decrease in mining operations.

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Мета. Обґрунтування можливості забезпечення енергетичної незалежності гірничодобувних регіонів за рахунок використання просторів відпрацьованих кар’єрів для виробництва електроенергії та економічної ефективності доопрацювання кар’єрів із одночасним створенням в них маломодульних атомних електростанцій.Методика. Аналіз застосовуваних у світі енергетичних систем, заснованих на використанні енергії атома, дозволив обґрунтувати створення маломодульних атомних електростанцій у просторах відпрацьованих кар'єрах.Результати. Обґрунтовано вид енергетичного комплексу, що розміщується в кар'єрі, тип атомного реактора, його потужність і безпека. Розглянута можливість спорудження атомної станції з одночасним веденням гірничих робіт. Обґрунтовано розташування атомного реактора, при якому б досягалося мінімальне забруднення навколишнього середовища. Встановлено економічну та соціальну ефективність створення атомної станції в кар'єрі.Наукова новизна. Вперше показано можливість розміщення атомної електростанції у просторі відпрацьованого кар’єру із забезпеченням її ресурсами, створенням екологічно безпечної роботи та економічної і соціальної ефективності.Практична цінність. Запропонований варіант розміщення міні атомної електростанції у просторі кар’єру одночасно з його доопрацюванням має соціальну, економічну та екологічну ефективність. Соціальна ефективність складається у перепрофілюванні кар’єру та забезпечення зайнятості населення. Екологічна ефективність полягає у зменшенні екологічного навантаження та рекультивації об’єктів гірничорудного комплексу. Економічна ефективність складається із зменшення собівартості руди, що буде видобуватись при доопрацюванні кар’єру, та близько 1 млрд. доларів операційного прибутку від експорту електроенергії, яку може виробити проектована електростанція.