SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”最新文献

{"title":"CLEAT SYSTEMS IDENTIFICATION IN COALBED METHANE RESERVOIRS OF THE LORRAINE BASIN WITH THE HELP OF X-RAY COMPUTER TOMOGRAPHY","authors":"V. Pryvalov, J. Pironon, P. Donato, A. Izart","doi":"10.31474/2073-9575-2019-1(21)-2(22)-61-71","DOIUrl":"https://doi.org/10.31474/2073-9575-2019-1(21)-2(22)-61-71","url":null,"abstract":"","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"20 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":"124414077","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 INFLUENCE OF GROUND WATER LEVEL RISE IN GOB OF COAL MINES ON GROUND SURFACE DEFORMATION ON THE EXAMPLE OF THE KOTLYAREVSKY MINE","authors":"I. Sakhno, S. Sakhno, A. Petrenko, O. Barkova","doi":"10.31474/2073-9575-2022-1(27)-2(28)-26-35","DOIUrl":"https://doi.org/10.31474/2073-9575-2022-1(27)-2(28)-26-35","url":null,"abstract":"Purpose. The study of the influence of mine water rising level of longwalls gob on the activation of deformation processes on the undermined earth’s surface. Methods. In the study was used the method of engineering and graphic analysis for calculating the parameters of the displacement trough according to the normative method. The finite element method that was implemented in the Ansys code was used to carry out studies of the influence of mine water rising level on the deformation of the earth’s surface. The problem is solved in an elastic-plastic setting, taking into account the heterogeneity of rocks. Findings. In accordance with the conditions of the southern part of the mine field, a landslide trough was drawn, and a plan of subsidence isolines was constructed with surface infrastructure objects. Surface objects, the risk of destruction of which increases when the mine water level rises, have been identified. The position of the cut line, which characterizes the most dangerous position, is determined. After the analysis and generalization of the results of the numerical experiment, it was established that the rise of mine water level in the gobs of 1th and 2th southern longwall of the coal seam l1 of Kotlyarevsky mine leads to the activation of landslides on the earth’s surface. At the same time, the vertical subsidence in the displacement trough in the case of flooding (to the full height of the zone of ordered destruction) increases by 22.4%, and the width of the trough increases disproportionately – by 1.3%. This contributes to a significant increase in hazards for surface infrastructure objects due to the increase in slopes and curvatures. Originality consists in establishing of the features of changes in surface displacement in the area of undermined earth’s surface due to the rise of mine water level. Practical implication. The results of the study can be used in the prediction of subsidence and other elements of landslides in the displacement trough, which are activated due to the rise of mine water level. At the same time, the possibility of timely planning and development of a set of measures to protect surface infrastructure objects from the negative impact of undermining is ensured. Keywords: earth’s surface displacement, surface undermine, landslides, displacement trough, rise of mine water level, surface displacement forecast.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"56 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":"126546093","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 NEW BELT OF SUBVOLCANIC DYKE FORMATIONS OF THE SOUTH-WESTERN CRIMEA: FEATURES OF THE BEDDING CONDITIONS, COMPOSITION AND DEFORMATION OF DYKES","authors":"V. Alokhin, T. Yegorova","doi":"10.31474/2073-9575-2019-1(21)-2(22)-14-25","DOIUrl":"https://doi.org/10.31474/2073-9575-2019-1(21)-2(22)-14-25","url":null,"abstract":"","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"53 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":"114815934","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":"PECULIARITIES CONDITIONS OF OCCURRENCE AND FORMATION OF DEFORMATION MEZOSTRUCTURES IN THE AREA OF KOBYLETSKA POLYANA VILLAGE (MARMOROSH MASSIF OF EASTERN CARPATHIANS)","authors":"V. Alokhin, Alina Boiarska, Anna Мurovska, V. Ishkov","doi":"10.31474/2073-9575-2021-1(25)-2(26)-116-126","DOIUrl":"https://doi.org/10.31474/2073-9575-2021-1(25)-2(26)-116-126","url":null,"abstract":"Purpose. The aim of the work was to establish the peculiarities of the conditions of occurrence and formation of deformation discontinuous mesostructures on the basis of field geological-structural and tectonophysical studies and microstructural analysis of rock samples. Methodology. The following are used in the work: traditional field geological and structural methods; methods of field tectonophysical research; computer programs «Fabric-8» and «Win-Tensor» for field data processing, construction of roses-diagrams of elements of discontinuous dislocations and reconstruction of paleostress field, mineralogical-petrographic and microstructural methods for studying the composition of rocks and microdeformations in sections. Results. According to the results of research, the systems of discontinuous deformation mesostructures and their correlation with regional discontinuous faults are established. The analysis of tectonic movements and their kinematic types is carried out, reconstruction of fields of paleonstresses is executed and features of changes of their types in different age deposits are established. The forms of manifestations of discontinuous dislocations at the micro level in sections are established. Scientific novelty. Several systems of discontinuous dislocation mesostructures have been established, which correspond to the main systems of regional discontinuous faults. Changes of their kinematic type in time are established for the same systems of discontinuous dislocations. Dislocations of the landslide type are a characteristic feature of the youngest sediments of the study area. Significant changes in the characteristics of paleostress fields on the research area have been established. Practical significance. The established peculiarities of the conditions of occurrence and evolution of discontinuous mesostructures in time allow to clarify the history of formation of the Marmorosh massif. It is established that the areas of intersection of discontinuous dislocations of different systems are the most promising for iron ore. Such areas are characterized by multistage in the development of discontinuous dislocations in time and abrupt changes in the kinematic types of paleostress fields. Key words: shales, limestones, sandstones, discontinuous deformations, landslides, mesostructures, paleostress field.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"172 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":"115457687","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":"REVIEW OF THE MODERN CONCEPTS ON THE DYNAMICS OF ROCK STRATA DEFORMATION OVER THE LONGWALLS GOB OF COAL MINES","authors":"O. Barkova, S. Sakhno","doi":"10.31474/2073-9575-2023-1(29)-49-56","DOIUrl":"https://doi.org/10.31474/2073-9575-2023-1(29)-49-56","url":null,"abstract":"Purpose. Analysis of modern studies of the processes of deformation of rock strata in the undermine zone during the development of coal seams in order to determine the general features and views that allow to substantiate the mechanistic model of deformations and subsidence. Methods. The work uses the method of engineering analysis, synthesis and generalization of information from various literary sources. Findings. Retrospective analysis of scientific studies devoted to the consequences of underground mining of stratum minerals by longwalls allowed to determine the main components of the process of deformation and movement of rocks in the undermine zone. Based on the conducted analysis, it was concluded that in the process of subsidence in the rock strata during the excavation of coal seams with the roof collapse method, different scientists distinguish from three to nine zones. The main three zones, which are components of all existing hypotheses today, are: the collapse zone, the zone of complete displacements, the zone of destruction. Based on the formation of these three zones, it is advisable to develop a schematic diagram of models for prognostic research. Originality consists in establishing the general mechanism of deformation and movement of the rock strata in the zone of longwall undermine. Practical implication. The research results can be used in the selection and justification of the mechanistic model, which is the basis of the calculation scheme during mathematical modeling. This will allow to provide high-quality results of forecasting subsidence of the earth's surface by longwall mining, as well as to adequately assess the effectiveness of measures to protect surface infrastructure objects. Keywords: earth's surface displacement, surface undermine, landslides, displacement trough, surface displacement forecast.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"37 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":"128261975","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":"DEFORMATION STRUCTURES AND STRESS FIELDS WITHIN PRUT PROMONTORY OF NORTH DOBROGEA IN CONTEXT OF DOBRUDZHA GEODYNAMICS (BY FIELD TECTONOPHYSICS STUDY)","authors":"A. Murovska, E. Polyachenko, V. Shpyra, S. Tikhlivets","doi":"10.31474/2073-9575-2019-1(21)-2(22)-39-50","DOIUrl":"https://doi.org/10.31474/2073-9575-2019-1(21)-2(22)-39-50","url":null,"abstract":"","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"113 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":"127734839","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":"DIGITAL GEOLOGICAL MAPPING AND GEODATA ANALYSIS USING TOOLS AND PLUGINS OF QGIS","authors":"Y. Vikhot, S. Kril, I. Bubniak","doi":"10.31474/2073-9575-2022-1(27)-2(28)-122-135","DOIUrl":"https://doi.org/10.31474/2073-9575-2022-1(27)-2(28)-122-135","url":null,"abstract":"Purpose. The article aims is to demonstrate the possibilities, methods and advantages of using Quantum GIS (QGIS) plugins and mobile applications for digital geological mapping, input and primary analysis of field geodata in Earth Sciences – Structural Geology, Engineering Geology, Hydrogeology, Ecology, Geophysics, etc. Methodology. The most important tools and plugins of QGIS, an open source GIS program, that works on the most widespread platforms – Windows, MacOS X, Linux and applications on Android, iOS for digital mapping, structural geodata analysis, and visualization are used. Results. The most important tools and plugins of QGIS (Georeferencer GDAL, GarminCustomMap, Profile Tool, VoGIS-ProfilTool, qProf, qgSurf, Stereonet, qgis2web, and QField mobile application) are analyzed. Their using for digital geological mapping, input and analysis of structural and other geodata, construction of 2D topographic profiles, visualization of geodata in web browsers are briefly described. Scientific novelty. Tools and plugins of QGIS, which are necessary for certain purposes for working with various types of data on geological maps, their analysis, and construction of geological and geophysical profiles are defined. QGIS software applications allow to add new plugins, create your own notations for digital mapping that can be used to solve specific geological tasks and analyze geospatial and geological data, or add ready-made specialized geological notations according to geological standards. Practical significance. Complex using of basic, additional external plugins of QGIS and specialized geological markings contributes to effective field digital mapping, modern visualization of various types of geological maps with spatial reference, creation of new digital electronic and complex demonstration maps for printing and visualization in web browsers, construction topographic and geological 2D profiles, GIS analysis of structural geodata, slope analysis, etc. Data obtained in QGIS can be imported into such specialized programs as Petrel Exploration & Production Software Platform (Shlumberger), MOVE Software (Midland Valley), etc. Keywords: Quantum GIS or QGIS, QGIS tools and plugins, digital geological mapping, QField, GIS analysis of structural geodata, slope analysis.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"19 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":"125222768","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":"CONCEPTUAL FOUNDATIONS FOR A NON-WASTE TECHNOLOGY DEVELOPMENT OF MINING THIN COAL SEAMS","authors":"M. Petlovanyi, D. Malashkevych, K. Sai, S. Zubko","doi":"10.31474/2073-9575-2022-1(27)-2(28)-7-17","DOIUrl":"https://doi.org/10.31474/2073-9575-2022-1(27)-2(28)-7-17","url":null,"abstract":"Purpose. Development and generalization of a set of key elements for a non-waste technology concept of mining high-quality coal from thin coal seams, based on the processes of backfilling the mined-out space with waste rocks from stope and tunneling operations. Methods. A comprehensive methodical approach, containing the systematization and generalization of the constituent elements of a non-waste coal mining technology based on the implementation of theoretical studies and substantiations, is used in the research. Findings. The main hypothesis of a new approach to non-waste coal mining has been formed, in which the priority is not only the process of leaving the maximum waste rock volume in underground cavities, but also its use to form backfill mass, thereby improving the geomechanical conditions for mining thin coal seams. A wide range of mining tasks has been formulated and systematized for using a non-waste coal mining technology. The conditions for the harmonious functioning of the proposed conceptual scheme of a non-waste coal mining technology within the extraction field boundaries have been determined and substantiated. The conceptual foundations for the functioning of a new highly efficient non-waste technology for mining high-quality thermal coal from thin coal seams have been developed. Originality. The scientific novelty is in revealing the mechanism for the effective logistic functioning of rock-transport systems for the accumulation of waste rocks in the underground space using a non-waste technology of coal mining from thin coal seams. Practical implication. The research results can be used in planning non-waste technological schemes for mining the coal with an increased energy potential. Keywords: non-waste technology, waste mine rocks, backfill, selective mining, stope, drifting face, transportation.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"101 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":"114890831","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":"IMPROVING THE PROPERTIES OF SPECIAL DOWNHOLE FLUIDS IN FIELD DEVELOPMENT","authors":"O. Aziukovskyi, A. Ihnatov, Y. Stavychnyi","doi":"10.31474/2073-9575-2022-1(27)-2(28)-96-106","DOIUrl":"https://doi.org/10.31474/2073-9575-2022-1(27)-2(28)-96-106","url":null,"abstract":"Purpose. Analytical, laboratory and industrial study, as well as analysis of the basic factors of rationalization of the use of special process fluids in the processes of cleaning, casing and cementing of boreholes drilled in difficult geological and lithological conditions, through the development and implementation of innovative technical and technological techniques and methods. Methodology. The study of borehole circulation, rock cutting and regime-technological processes was carried out using modern methods of physical bench modeling, instrumentation and related materials, as well as processing the results of studies in the EXCEL, MATHCAD environment. Laboratory control methods were used to study the technological characteristics of special fluids and the patterns of operation of the drilling tool, which are working methods for determining the main characteristics of the formation processes of the wellbore at different stages of its construction. The design of the stabilized buffer mixture was carried out using the method of orthogonal central compositional planning. Findings. The physicochemical properties and influence of washing liquids of various compositions on the rocks of the sedimentary and metamorphic complexes have been studied from the standpoint of their hydration and the ability for surface adsorption interaction. The mechanism of the flow of well circulation processes with the participation of flushing fluids, as well as its consequences for the appearance of prerequisites for reducing the strength of the rock mass and reducing the loss of mechanical power in the wellbore, has been studied. The principles of constructing optimal schemes for the regeneration of a flushing liquid based on the use of sedimentation phenomena are considered. The development and clarification of downhole factors in the behavior of buffer fluids, taking into account their provision for the complete exclusion of the manifestation of violations of the integrity of the cement stone. Originality. Rationalization of indicators of the well construction process can be successfully achieved on the basis of directed regulation and adaptation of the main physical and chemical properties (density, viscosity, surface tension, content of lubricating impurities) of special process fluids for specific well geological and technical conditions. Practical value. The presented research results provide the basis for building a closed engineering cycle for designing and using special process fluids in order to reduce the time for well construction and eliminate the cost of complex repair and restoration work in them. Keywords: flushing liquid, surfactant, well, drilling, buffer system, fastening, cement stone, mine.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"9 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":"114274545","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 STABILITY OF THE ROOF IN THE CARBON ART, WHICH CONTAINS PRODUCTS DURING THE DEVELOPMENT OF HARD COAL LAYERS","authors":"A. Korol","doi":"10.31474/2073-9575-2021-1(25)-2(26)-73-82","DOIUrl":"https://doi.org/10.31474/2073-9575-2021-1(25)-2(26)-73-82","url":null,"abstract":"Purpose. Estimation of stability of a roof of a steep coal seam in the coal massif for maintenance of an operational condition of mine workings. Methods. To achieve this goal, analytical studies were performed using the basic principles of classical mechanics, the theory of elasticity and resistance of materials, when the roof of the coal seam was studied in the form of a model of a beam with a support. Results. As a result of the performed researches it is established that for an inclined single-girder beam with supports, at any regularity of distribution of loading on a surface the maximum deflection around the middle of span within (0,48 – 0,579) length of a beam is fixed. The value of the maximum deflection of the deformed load-bearing element depends on the angle of inclination and the ratio of the linear dimensions of the simulated beam. The curved axis is not perfectly symmetrical about the middle of the beam. The deviation from the symmetry depends on the linear dimensions of the model, the angle of inclination and is determined by the direction of the vector of total displacement of the beam. The deviation from the symmetry depends on the linear dimensions of the model, the angle of inclination and is determined by the direction of the vector of total displacement of the beam. The area in which the loss of stability of the load-bearing element is possible, occupies about 10% of the length of the inclined beam. In the presence of an asymmetrical deflection, to avoid loss of stability of the model, the placement of the system of supporting supports is advisable in this area of the beam. Scientific novelty. For the roof of a steep coal seam in its modeling in the form of an inclined single-girder beam with supports, when the external load is distributed on the surface naturally, the direction of the vector of complete displacement of the loaded model determines the contour of the curved axis of the deformed load-bearing element. Practical significance. The stability of the lateral rocks of the steep coal seam, which determines the operational condition of the mine workings in the coal massif, is provided by a system of supporting supports, the deformation characteristics of which are determined by the predicted deflection of the roof in the produced space. Keywords: stability, lateral rocks, coal massif, mining, deflection, supporting support.","PeriodicalId":430946,"journal":{"name":"SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”","volume":"15 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":"124087469","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}