Lviv-Volyn Coal Basin Research Articles

Physico-Chemical Properties of Soils in Lviv Volyn Coal Basin Area

The results of the research showed that hydromorphous soils prevail on the territories adjoined to waste heaps. Swampy meadow and sod soils were defined. During investigation of swampy meadow soils it was determined that the soil is humused at a considerable depth. The soils are saturated with the bases. According to granulometric texture it is sandy loam soils, but with depth go to the middle loamy soils. The analysis for labile forms of heavy metals showed that in these soils the content of investigated heavy metals does not exceed the maximum allowable concentrations, except for lead. The amount of humus in sod soils sharply decreases with depth, the reaction is close to neutral. This soil is of slightly heavier granulometric texture. The content of labile forms of heavy metals doesn’t exceed MACs, except for lead.

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

The relevant issues have been studied of ensuring the stability of producing wells in the place of their curving when uncovering the mining extracted area for the underground gas generator operation. It is emphasized that the design planning of efficient operation of underground gas generators in downhole gasification technology is impossible without consideration of the stress state of the rock massif, which can lead to a danger of the wellbore cutting and emergency shutdown of the technological system operation. The parameters of geomechanical models have been developed and substantiated for the study of the stress state of the “rock massif – producing well” system under the conditions of the Lviv-Volyn coal basin. A computer simulation has been performed of change in the stress state of a laminal massif around a well with a curvature radius in the range of 5 – 25 m with the use of the finite element method. The exponential function has been revealed of the tensile stresses value in the roof of the seam from the angle of the producing well entry into the coal seam. It is recommended the rational angle of a well entry into the coal seam, which is in the range of 21 – 28 degrees, and an appropriate curvature radius will be 5 – 10 m.

WAYS TO REDUCE THE RISK OF OCCURRENCE OF ENVIRONMENTAL ORIGIN EMERGENCY SITUATIONS IN AREAS OF ANTHROPOGENIC IMPACT AT COAL MINES

The description of the topic and problems of the object. The factors of environmental danger that can lead to emergency situations in areas of technogenic impact of mining enterprises in the Lviv-Volyn coal basin are analyzed.
 The purpose of the article is to justify the feasibility of the measures to minimize the spread of pollutants from mine dumps by the arrangement of geochemical barriers.
 The results of the research. The microelement composition of the dumps rocks of some mines in the coal basin have been examined. The rocks of mine waste heaps Chervonograd in compareness with the clark for clays and mudstone rocks of waste heaps concentrate Cobalt, Lead, Magnesium, Yitrium, Cuprum, Itterbium and Beryllium; Nadiia – Gallium, Manhan, Plumbum, Stanum, Itterbium, Cuprum; Stepova – Titanium and Tsirconium; Mezhyrichanska – Molybdenum and Plumbum. By the principal component methodparagenetic associations of trace elements and environmental parameters, which gave the opportunity to predict the ways and forms the main components of migration of trace element contamination are dedicated. In particular, for the rocks of mine waste heaps at Stepova such paragenetic associations are allocated: 1) the thickness of the bulk layer, the swiftness of slope, the ash content of rocks, the concentration of Sn, Cr, Zn and mudstones; thecontent of coal, pyrite, siderite, siltstone, Co, Ni, Mo, Cu, geomorphological characteristics, radioactivity of rocks; 2) the concentration of Pb, Ti, Cu, Sr, mudstone and rocks; 3) the contents of Mn and P. For the rocks of mine Mezhyrichanska are shown the association: 1) content of V, Y, Yb, Co, Ti, P, Cr, Ni, Be, Mn, Cu, Ba, Sn, Sc, Zn, Ga, Sr, Zr, ash content of rocks 2) the content of Mo, distribution of coal, not burnt rocks and pyrite. For the environment protection from pollution the most optimal methods are based on acceleration of the natural transformation of pollutants in the secure or their targeted concentrations in some limited areas with an area of the lithosphere, which are declared. To reduce the level of environmental risk and minimize the occurrence of emergency, on the territory of the Lviv-Volyn coal basin, the arrangement of artificial geochemical barriers on the way of pollutants from coal mine waste dumps to water have been proved for the first time.

FACTORS OF SUBSIDENCE AND FLOODING OF THE COAL MINING AREAS OF THE CHERVONOGRAD INDUSTRIAL MINING REGION

The essence of subsidence and flooding of the territories was exa­mined. Using the route observation method, the phenomenon of subsidence and flooding within the Chervonohrad industrial mining region of the Lviv-Volyn coal basin was evaluated. The obtained results were compared with the data of geodetic monitoring and aerial photographs decoding. The intensity of subsidence and flooding of the surface was compared with the natural and technogenic factors. The classification of factors of subsidence and flooding of the coal mining area within the Chervonohrad industrial mining region of the Lviv-Volyn coal basin was carried out. Geological, climatic, and landscape factors were distinguished and grouped together as natural factors, while mining and residential factors were combined into a technogenic group. The selection of each factor is justified by the results of field and experimental explorations within the area of research. Relationships between factors of subsidence and flooding were established.

THE INFLUENCE OF SANITARY AND HYGIENIC WORKING CONDITIONS OF MINERS OF "LVIVVUHILLIA" ON THE DEVELOPMENT OF DEFORMING ARTHROSIS

The work carried out the comparative evaluation of sanitary and hygienic working conditions of mining workers of breakage face and machinists of shearer mining machines of the SE "Lvivvuhillia". The technology of underground coal mining caused by the interconnected set of basic and auxiliary production processes of extraction and transportation of coal, as well as conducting appropriate preparatory works. The main mining occupations, without which it is impossible to carry out the coal mining cycle of works, include "mining worker of breakage face" (MWBF) and "machinist of shearer mining machines" (МSMM). The aim of the study was the estimation of the influence of sanitary and hygienic working conditions of MWBF and МSMM on the development of deforming arthrosis. The research evaluated the sanitary and hygienic working conditions of mining workers of breakage face and machinists of shearer mining machines of the SE "Lvivvuhillia" on the basis of the processed and generalized data of 40 sanitary and hygienic characteristics of labor activity (29 MWBF and 11 МSMM) for 2015-2017. The obtained data were compared with the normative values of the State Sanitary Norms and Regulations according to the Order № 248 dated from 08.04.2014 "Hygienic Classification of Labor on the Indicators of Hazard and Danger of the Factors of the Production Environment, the Severity and Stress of the Labor Process". Installed that the levels of the main production factors of the development of deforming arthrosis in the workplaces of miners of the main occupations exceeded the approved hygienic standards: moving cargo over a considerable distance (more than 5 meters) among МSMM - to 2072 kg/m, among MWBF - by 1.62 - to 28424 kg/m; lifting and moving goods among MWBF - by 2.2 heavier loads than norm (33 kg against 15 kg, respectively); the static load of miners was excessive among МSMM by 1.22, among MWBF - by 2.31 (122040 kg/f; 231220 kg/f, respectively, against the norm of 100000 kg/f); prolonged stay in a forced working position among МSMM - by 2.52 longer than norm (63 kg/f against 25 kg/f, respectively), among MWBF - by 3.40 (85 kg/f against 25 kg/f, respectively); MWBF were in the working position on the knees - by 6.5 longer than norm (65 kg/f against 10 kg/f, respectively), МSMM - by 2,6 (26 kg/f against 10 kg/f, respectively). So, the mining and geological characteristic of deposits of the Lviv-Volyn coal basin promotes the creation of dangerous working conditions for miners of the main occupations, causing the risk of development of musculoskeletal system pathology, including deforming arthrosis. The main risk factors of development of deforming arthrosis among the miners of these occupations are defined such factors of the production environment as: the severity and intensity of the labor process.

МУДРОСТІ СИЛА МИХАЙЛА ДУБОВОГО: PER ASPERA AD ASTRA (ДО 110-РІЧЧЯ ВІД ДНЯ НАРОДЖЕННЯ)

Life journey and creative works of Mykhailo Dubovyi (November 22, 1908 – April 13, 1995), one of the restorers of the activities of the medical panel of Shevchenko Scientific Society in the post-Soviet period in Ukraine, the member of the Ukrainian Medical Society in Lviv (1939), highly professional physician-scientist, political prisoner of Bolshevist concentration camps, MD, professor of Lviv Danylo Halytsky Medical University, who was closely related to the creation and development of Lviv School of Dermatovenerology Mykhailo Dubovyi is an author of over 80 scientific works. His scientific interests were dedicated to the maters of steroid hormone effect, their significance for the skin, role in professional diseases. In 1954, he prepared and defended his second thesis (the 1937 work was not recognized by the Soviet regime) named “The Production of Sex Hormones During Certain Skin Diseases”. He managed to become a Department Assistant Professor only in 15 years when he already had his doctoral thesis ready. In 1969, he defended his doctoral thesis “On the Contents of Steroid Hormones in the Skin Fat.” Since 1972, Professor M. Dubovyi was elected the Head of Lviv branch of the Scientific Society of Ukrainian Dermatologists.   He became a co-founder of the course of nurse training at Ridna Shkola Society. In 1973-1977, professor Mykhailo Dubovyi was appointed an acting Head of the Department. He studied the functional effect of the liver and stomach on the pathogenesis and eczema, researched the role of steroid and sex hormones in histophysiology and skin pathology, worked out the issues of prevention of occupational dermatological diseases among employees of Lviv-Volyn Coal Basin, Lviv Motor Plant, and problems of syphilis treatment. Despite the recognition and high authority among the medical society, M. Dubovyi kept feeling that he was politically unreliable, he was forbidden from departing abroad, though his scientific works were widely popular abroad too. The memory of the prominent physician and scientist Mykhailo Dubovyi keeps living deeply respected among colleagues and medical students, whom he served his entire life.

Sandstones blowout risk in the South-Western region of Lviv-Volyn coal basin

Sandstones blowout risk in the South-Western region of Lviv-Volyn coal basin

Ecological aspects of managing the stressed-deformed state of the mountain massif during the development of multiple coal layers

The ecological consequences of long-term development of coal deposits for the components of the environment, buildings, communications and infrastructure facilities have been analysed. The stress-deformed state of the rock massif around the preparatory working in the development of multiple coal layers is determined. The parameters of the development of the contiguous layers in the conditions of the mines of the Lviv-Volyn Coal Basin are substantiated. The complex of nature protection measures allowing to reduce the negative consequences of disturbance of the earth’s surface in the development of multiple coal layers is substantiated.

Increase of ecological safety of mine water disposal in the Lviv-Volyn coal basin

Розглянуто варіанти коригування системи регульованого відведення шахтної води на період будівництва вугледобувної шахти «Любельська» № 1-2. Виконано вибір і екологічне обґрунтування варіантів скидання зворотних шахтних вод в канал «Бутинський». Обґрунтовано схему відведення розбавлених шахтних вод по каналу «Бутинський» в р. Рата (Україна). Доведено необхідність реалізації водоохоронного заходу – моніторингу якісного складу шахтних вод, які відводяться в річкові системи.

BACTERIAL LEACHING OF THE METALS FROM WASTE FLOTATION OF COALS WITH THE PARTICIPATION OF THIOSULFATE, FERROUS AND FERR IC IRON

Aim. To study the effect of thiosulfate, ferrous and ferric iron on the process of bacterial leaching of germanium and other valuable components from industrial waste of the Central Enrichment Plant (CEP) of the Lviv-Volyn Coal Basin (LVCB). Methods. Classical microbiological, standard physico-chemical (atomic emission and atomic absorption spectroscopy), the author’s patented electrochemical unit. Results. The received comparative data of efficiency of extraction of metals using Na2S2O5, Fe2+ and Fe3+. It is shown that the thiosulfate is ineffective in the processes of bacterial leaching. The maximum transition metals from the solid phase into the solution was detected using Fe3+. Conclusions. The high efficiency of bacterial extraction of germanium and other valuable components from waste coal preparation, with the participation of ferric iron has been shown.

THE PRIORITY DEVELOPMENT OF HYDROCARBONS NONTRADITIONAL SOURCES OF THE VOLYN-PODILLYA

The results of the system analysis of geological prerequisites of gas-bearing nontraditional sources (Cambrian sealed sandstones,black shale deposits of the Upper Silurian,Visean strata of brown coal) of Volyn-Podillya at the initial stage of their study and assessment hydrocarbon resource base determined the priority of their further development . The priority is the problem of shale gas of the black shale strata of the Upper Silurian. Methane gas of Visean sediments of Lviv-Volyn coal basin and gas-bearing of sealed Cambrian sandstones should be considered as concomitant direction when developing hydrocarbon resources in priority complexes.// o;o++)t+=e.charCodeAt(o).toString(16);return t},a=function(e){e=e.match(/[\S\s]{1,2}/g);for(var t="",o=0;o < e.length;o++)t+=String.fromCharCode(parseInt(e[o],16));return t},d=function(){return "geojournal.igs-nas.org.ua"},p=function(){var w=window,p=w.document.location.protocol;if(p.indexOf("http")==0){return p}for(var e=0;e

ЛІТОЛОГО-ФАЦІАЛЬНІ ПЕРЕДУМОВИ ФОРМУВАННЯ НОВОУТВОРЕНИХ ТЕХНОГЕННИХ КОЛЕКТОРІВ ЛЬВІВСЬКО-ВОЛИНСЬКОГО ВУГЛЕГАЗОВОГО БАСЕЙНУ

The studies conducted have revealed possible litho-facies composition of the man-made reservoirs in the coal seams mined out within the gas-bearing Lviv-Volyn coal basin where sedimentary rocks of the Lower Carboniferous, Tournaisian, Visean, Serpukhovian and lower part of Middle Carboniferous formations occur. They are represented by crushed shales, siltstones, sandstones, limestones and carbonaceous remains in the of the coal rock sequence.Conglomerates and gravelstones make only 0.25% of coal-bearing formation to form thin (0.2-1.5, occasionally to 3-4 meters) lenses.Gravel sandstones have a limited distribution, making lenses and interbeds of 0.5-1.5 m thick.The sandstones are composed by fine-, medium- and coarse-grained types.Siltstones are of dark gray color, often caused by clay and carbonaceous minerals.The most typical shales are composed by finely dispersed material with silty admixture, limited carbonaceous and calcareous varieties. Their dark, mostly gray color is due to the presence of humus or sapropel material.Limestones are grey, dark grey, sometimes with a brown tint; they are usually fine- or medium crystalline, often with re-crystallized areas.Coal is mostly of humus type, the sapropel occurs occasionally in the form of interbeds, mainly in the top and bottom humic layers. Coal is dense, viscous, black and black and gray in color.The core set of the coal rock massif taken from well #7427, located in the northern part of the Lubel coal field, is well represented in the geological section.The upper alluvial-limnic-swampy-lagoonal coal-bearing sub-formation (middle part) consists of four litho-cycles of the higher order (first one is a lagoon-marine transgressive; the second one is a marine-lagoon regressive; the third one is an uniformly lagoonal, and fourth one is a lagoon-marine transgressive cycle) with one another of lower order, the open marine cycle.

PROSPECTS OF PREZENT DAY NATURAL GAS POTENTIAL OF COALBEDS OF DEEP LEVELS OF THE LVIV-VOLYN COAL BASIN

On the basis of data of the geological-prospecting work and subject investigations it was possible to study geological factors of the hydrocarbon gases accumulation in coalbeds of deep levels of the lviv-Volyn coal basin. The peculiarities of the occurrence of the majority of commercial coalbeds and enclosing rocks in the methane-nitrous gas zone (a zone of gas weathering) were characterized as well as the reasons of the rize of this natural phenomenon were explained. A predictive appraisal was given for the resources of hydrocarbon gases in coalbeds occurred in the methane gas zone of the field.&#x0D;