JOURNAL of Donetsk mining institute最新文献

{"title":"FEATURES OF THE STRESSED-DEFORMED STATE OF THE SIDE BREEDS IN THE ASSESSMENT OF THE OPERATIONAL STATE OF MINING OPERATIONS","authors":"V. Gogo, A. Kipko, N. Vlasenko, Y. Simonova, A. Polozhy, Yevgen Podkopayev","doi":"10.31474/1999-981X-2019-1-53-64","DOIUrl":"https://doi.org/10.31474/1999-981X-2019-1-53-64","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125412159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PREDICTION OF THE PARAMETERS OF THE CAVE-IN ROCK FORMATION IN ROOF OF THE LONGWALL OF COAL MINES","authors":"A. Serhiienko, I. Liashok, L. Serhiienko, S. Podkopaiev, O. Kohtieva","doi":"10.31474/1999-981x-2022-2-108-121","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-2-108-121","url":null,"abstract":"Purpose. Process research of the parameters of the cave-in rock formation in roof of the 9th northern longwall of block #10 “Mines Control Pokrovske” Method. Numerical modeling of the volumetric stress-strain state (finite element method), the method of continuous media, the method of contact interaction of surfaces, analytical studies of the process of the formation of rock cave-in of the immediate roof. Results. The article presents the results of numerical modeling of the three-dimensional stress-strain state of a layered rock massif, with boundary conditions of contact interaction between rock layers and with the load of gravitational forces. The results of the grapho-analytical method of modeling the volume formation of fallout formation are presented on the example of working out the 9th northern bench of block No. 10 “PRAT Mine Management Pokrovske”. Calculated collapse parameters of the direct and main roof. The obtained parameters of fallout and their location. Scientific novelty The results of predicting the formation of cave-in rock the immediate roof of cleaning potholes using the volumetric stress-deformed state of a layered massif with the gravitational load of rock layers are presented. The results of predicting the formation of cave-in rock using the rock crack resistance criterion are presented. Practical significance. The practical significance lies in the method of predicting the processes of cave-in rock formation in the immediate roof during the working of coal seams and determining their parameters. The calculation process of numerical modeling of the step-by-step increase of the produced space gives a general picture of the state of rock layers above the produced space and their destruction zones, and determines the following measures to strengthen the roof in the coal face.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122198911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASSESSMENT OF THE PARAMETERS OF THE UNLOADING ZONE AND ITS USE FOR THE SAFE MINING OF OUTBURST-HAZARDOUS COAL SEAMS","authors":"S. Mineev","doi":"10.31474/1999-981x-2022-1-86-99","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-1-86-99","url":null,"abstract":"Meta. The purpose of the research is to substantiate the main characteristics of the unloading zone in the bottom-hole part of the seam and to clarify the parameters of its use for the safe mining of outburst-hazardous coal seams. Research methodology. The article analyzes the results of determining the size of the unloading zone by various methods of monitoring the effectiveness of the measures taken and the danger of coal mining in this zone. Results. The definition of the unloading zone as some degassed part of the mountain massif with destroyed or extracted coal is formulated, when discussing the obtained results. It has been established that in this zone there is a possibility of excavation coal to a given depth without anti-emission measures with the possibility of adjusting the amount of excavation by the depth of the unloading zone, taking into account non-reducing advance. The size of the unloading zone is determined by the time bottomhole sludge, taking into account: SSS (stress-strain state), PMP (physical and mechanical properties), geological factors and technology of destruction of the array. Scientific novelty. The size of the unloading zone may vary depending on the technological factor (excavation technology). For example, with a fast plow cut, the zone does not have time to form, i.e. when a plow (combine) either takes out a strip along the entire length of the lava or can be cut forward by 2-3 m. Practical significance. The performed studies established the fact of the formation of an unloaded zone in the bottom-hole part of the formation. The time interval for the formation of an unloading zone is from 1 to 3 hours for mechanized coal mining and up to 24 hours for explosive breaking of coal, which is practically used in regulating the duration of technological processes. The unloading zone on outburst-prone formations varies from the minimum dimensions close to zero to several meters.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115497051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALYSIS OF APPLICATION EFFICIENCY OF SINGLE AND DOUBLE ROW MECHANISED FIXTURES IN THE CONDITIONS OF SYNCHRONIZATION OF MINING WORKS AND FLOODING OF MINES","authors":"S. Vlasov, I. Sadovenko, Yavhen Moldavanov, S. Timchenko","doi":"10.31474/1999-981x-2023-1-7-15","DOIUrl":"https://doi.org/10.31474/1999-981x-2023-1-7-15","url":null,"abstract":"Purpose. Determination of a rational option for using a type of mechanized fastening in the conditions of simultaneous flooding of mines and mining operations, taking into account the manifestations of hydrostatic pressure formed in the main roof of the coal seam.\u0000\u0000Method. The research used the method of numerical modelling and analysis of the displacement of the sole and roof of the coal seam and the prediction of the step-by-step progress of the cleaning pit in the layered transversely isotropic massif of rocks using the Solid Works 2019 software package.\u0000\u0000Results. Obtained statistical parameters of the use of mechanized fastening in the hydrogeotechnical conditions of the mines of Western Donbas based on the collected actual data of the mining enterprises of PJSC «DTEK Pavlogradvugillia». The reasonable feasibility of using a supporting and fencing four-pillar, two-row mechanized fastening of the KD-80 type by comparing the results of modelling its operation with a two-pillar single-row fastening of the Ostroj-70/125 type in conditions of a layered massif with manifestations of hydrostatic pressure.\u0000\u0000Scientific novelty. For the first time, a geotechnical forecast was performed on the basis of numerical comparative modelling of the operation of single- and double-row mechanized fasteners in the conditions of simultaneous flooding of the mine and mining operations, taking into account the manifestations of hydrostatic pressure, which is formed in the main roof of the coal seams of the mines of Western Donbas. When using two-pillar single-row fastening, the value of convergence can increase by more than 33%, in comparison with four-pillar two-row mechanized fastening of the support-fencing type.\u0000\u0000Practical significance. The research results make it possible to determine a rational option for using the type of mechanized fastenings for the complicated hydrotechnical conditions of coal mining from ultra-thin coal seams of the mines of Western Donbas, as well as to develop recommendations for technological improvement of mining operations, to minimize accidents associated with the subsidence of sections of mechanized fastening «on hard base», which significantly increases the efficiency of coal mining.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115520905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"USE OF DIGITAL PHOTOGRAPHIC METHOD FOR THE CREATION OF VIRTUAL GEOLOGICAL OUTCROPS, CASE STUDIES ON THE CLASTIC DIKES FROM WESTERN UKRAINE","authors":"І. М. Bubniak, А. М. Bubniak, Y. Shylo, О.М. Shylo, Consulting Geologist","doi":"10.31474/1999-981X-2019-1-154-159","DOIUrl":"https://doi.org/10.31474/1999-981X-2019-1-154-159","url":null,"abstract":"The aim of the work is to demonstrate the usefulness of digital photogrammetry for the purposes of Structural Geology. The studied object clastic dikes in the Oligocene deposits of the Ukrainian Carpathians, which are localized in the village of Stankovtsi of the Dolyna District of Ivano-Frankivsk Region. They are important indicators of the geodynamic conditions in different tectonic conditions. Method. For this object digital photogrammetry was first used for the construction of a three-dimensional outcrop. The workflow for collecting, processing and presenting the 3D model is presented. For the first time digital photogrammetry was used for the construction of a three-dimensional outcrops. To create the model, the Sony Alpha 7 digital camera, the Leica TCR405 electronic station and the South Galaxy G1 GNSS receiver were used. Field scan results were processed using Agisoft Photoscan software. Results. There are described advantages and disadvantages of digital photogrammetric data for the purposes of Structural Geology. The advantages of using digital photogrammetry are the high performance of the surveying and their high precision. The disadvantages include the lack of a sufficient number of specialists working in the field of digital photogrammetry. Practical significance. The created model will be used for visualization of the structural features of the outcrops, subsequent construction with the use of various computer programs. First and foremost, these include Move and CloudCompare, which allow receiving a large amount of information necessary for a structural geologist in an office. Such data include: the thickness of the layers, both plane and linear elements.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125805719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVELOPING RECOMMENDATIONS FOR PREVENTING ACCIDENTS AND EMERGENCIES AT MINING ENTERPRISES IN UKRAINE","authors":"V. Ezhov, V. Riasnyi, I. Yevstratenko, S. Chukharev, V. Korniyenko","doi":"10.31474/1999-981x-2021-2-35-42","DOIUrl":"https://doi.org/10.31474/1999-981x-2021-2-35-42","url":null,"abstract":"Purpose. To analyse accidents at Ukrainian mining enterprises and to develop recommendations for the prevention of accidents and emergencies. Methodology. Statistical information on operational visits to accidents and emergencies by the paramilitary mine rescue service (PMRS) serving mining enterprises and other information on the state of accidents at mining enterprises in Ukraine was collected and processed. Results. On the base of statistical data provided by the PMRS and other public sources, it was determined that the main accidents and emergencies occurred in 2020 and 2021 at mining enterprises are: fires, collapse and falling of fragments of rock, in-mine and pit transport accidents, accidents caused by the use of the lifting complexes, head frame structures and mine shafts directly. Scientific novelty. The cases of accidents and emergencies at mining enterprises are systematised and measures for their prevention are proposed. Practical significance. Practical recommendations developed for mining enterprises in Ukraine on preventing accidents and emergencies in the underground and open-pit mining of mineral deposits. Priority areas of work for the next years determined for managers of mining enterprises and labour protection services: fire protection of enterprises, safety in use of in-mine and pit transport, control over conditions of lifting complexes and mine shafts; control over the use of power equipment, protection of miners against traumas at collapse in underground mine workings and surface mines, implementation of occupational health and safety training programmes for miners.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122334657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A METHOD FOR EVALUATING THE BALANCE AND QUALITY OF GROUNDWATER AND MINE WATER IN THE SYSTEM OF HYDRAULICALLY CONNECTED MINES","authors":"D. Rudakov, Sun Yajun, O. Inkin","doi":"10.31474/1999-981x-2022-2-85-92","DOIUrl":"https://doi.org/10.31474/1999-981x-2022-2-85-92","url":null,"abstract":"Purpose. This study aims to develop and test a method for analytical evaluating the water-salt balance within a group of hydraulically connected mines. Methods. The proposed approach includes collection, systematisation, and analysis of actual data on the flow properties of rocks, mining and geological conditions of mining coal seams that influence forming the hydrodynamic regime of the mines of the Selydivska group. To evaluate the water-salt balance of the hydraulically connected mines, the balance method and the analytical relationships of the groundwater flow theory were used. Results. The water-salt balance elements for the hydraulically connected mines of the Selydivska group were calculated for three variants having reached the good conformity with available actual data on inflows and interflows between the mines. Inter-mine fluxes of total salt mass and salts were estimated as well as iron and manganese as microelements with the highest content in mine water. According to on the predictive estimate, the increase in the water level in mine no. 2 “Novogrodivska” from +130 m to +180 m will lead to an increase in the inter-mine water inflow of up to 10% to the active mine no. 1–3 “Novogrodivska” with a proportional increase in salt flux. Novelty. The method of calculating the water-salt balance of hydraulically connected mines based on the balance method in combination with the analytical relations of the groundwater flow theory has been substantiated and verified. The developed technique allows to preliminary estimate hydrogeochemical regime parameters without discretization of the flooded mine territory in comparison to sophisticated numerical models. Practical significance. The proposed technique can be used both for engineering predictions of the groundwater and surface water quality near closed mines, and for substantiation of a conceptual model for numerical analysis of the hydrogeochemical regime in the territories of former mineral extraction.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122685684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DETERMINATION OF CONTROL FACTORS AFFECTING THE PROBABILITY OF A SUDDEN OUTBURST OF COAL AND GAS IN A BREAKAGE FACE","authors":"Khorolskyi Andrii, Kosenko Andrii, Sai Kateryna, Petlovanyi Mykhailo","doi":"10.31474/1999-981x-2023-1-97-108","DOIUrl":"https://doi.org/10.31474/1999-981x-2023-1-97-108","url":null,"abstract":"Purpose. To establish priority (control) factors affecting the probability of a sudden outburst of coal and gas in a breakage face, which will allow making optimal technological decisions when mining outburst-prone coal seams.\u0000\u0000Methods. An integrated method that involves the use of energy-force models to assess the likelihood of sudden outbursts of coal and gas; application of simulation modelling to determine priority control factors; application of an algorithm for enumeration of discrete values for each parameter, to find the average value of the increment of potential energy in a unit volume of coal in the working area of the longwall machine; application of dynamic programming to substantiate technological parameters (seam thickness, web width cutter-loader, length of a breakage face, etc.) mining of outburst-prone coal seams.\u0000\u0000Results. A mathematical model has been developed for the excitation of a sudden outburst of coal and gas, based on the energy theory of the occurrence of a sudden outburst of coal and gas. According to this model, the main sources of energy leading to the destruction of the seam are the energy of elastic deformation of the coal seam, the potential and kinetic energy of rocks, the internal energy of free and desorbed gas. On steeply falling seams, additional energy sources are the gravitational energy (positional energy) of the coal seam. The developed model allows establishing priority control factors and study the patterns of their change. Based on the setting of priority control factors, it is possible to choose the optimal technological schemes for mining outburst-prone coal seams. \u0000\u0000Scientific novelty. The scientific novelty consists in determining the priority control factors that affect the possibility of a sudden outburst of coal and gas, as well as establishing the pattern of their change. For this, a simulation algorithm was developed, which made it possible to establish the essential parameters of outburst-prone coal seams. Based on the algorithm for estimating the probability of a sudden outburst of coal and gas, the optimal technological parameters for mining of outburst-prone coal seams (web width, length of a breakage face, rate of advance) were determined.\u0000\u0000Practical implication. It consists in creating a package of applications for the selection of treatment equipment in accordance with certain technological solutions. On the basis of the data obtained, the optimal technological schemes for the mining of outburst-prone coal seams are substantiated, and mechanization means are selected based on the application of a package of applied programs.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131220896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE MAIN FEATURES OF COMPLEX TECHNO-SYSTEMS AND THEIR BALANCE","authors":"V. Yermakov, O. Lunova, D. Averin","doi":"10.31474/1999-981X-2019-1-23-33","DOIUrl":"https://doi.org/10.31474/1999-981X-2019-1-23-33","url":null,"abstract":"","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132684717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH OF THE FORMS OF MOTION TRAJECTORIES OF THE WORKING TOOL OF TOROIDAL PLANETARY EXECUTIVE UNITS OF MINING MACHINES","authors":"Denys Dovhal","doi":"10.31474/1999-981x-2021-1-19-24","DOIUrl":"https://doi.org/10.31474/1999-981x-2021-1-19-24","url":null,"abstract":"Purpose. The purpose of this work is to determine and geometric analysis of possible forms of trajectories of the working tool, depending on the design and operating parameters of the torus planetary executive bodies of mining machines in the destruction of rock mass or minerals. Methods. Studies are based on the provisions of analytical and differential geometry, geometric modeling of objects, processes and phenomena, the theory of destruction of rocks and coal, as well as the theory of planetary executive bodies of mining machines. Results. On the basis of the mathematical model of the working process of the torus planetary executive body, the main forms of the trajectory of the spatial motion of a single working tool are considered, their geometric analysis is carried out. The characteristic features of the change in the shape of the trajectories are revealed when the values of the design and operating parameters of the executive body are varied, and their frequency is determined. Scientific novelty. For the first time, in the general case, a mathematical model of the process of movement of a single tool of a torus planetary executive body was analyzed in order to identify all possible characteristic forms of trajectories and, as a result, face surfaces, which constitute the basis for further research and optimization of the kinematic and dynamic characteristics of the process of destruction of a rock mass by executive bodies of mining machines. of the specified type. Practical significance. Scientifically substantiated data on the influence of the values ​​of the design and operating parameters on the parameters of the tool path, the degree of surface treatment of the face and the conditions for the transition of the torus executive body to other design cases of the planetary executive body have been obtained. All this in the future will make it possible to determine rational relationships between the design and operating parameters of the torus executive body, which will provide an effective “grid” of cutting, which will minimize the energy indicators of the destruction process and improve the fractional composition of the separated rock mass.","PeriodicalId":344647,"journal":{"name":"JOURNAL of Donetsk mining institute","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130092932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}