Acta Montanistica Slovaca最新文献_第8页

Accident rate in Polish mining. Current status and forecast 波兰矿业的事故率。现状与展望

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.05

{"title":"Accident rate in Polish mining. Current status and forecast","authors":"","doi":"10.46544/ams.v27i3.05","DOIUrl":"https://doi.org/10.46544/ams.v27i3.05","url":null,"abstract":"The article presents the analysis of accidents at work in the Polish mining industry in the period from 2010 to 2020 with forecasts for the next three years. The study consists of two parts. The first part deals with methods of analysing working conditions in the mining industry. A key element of the literature review is the econometric methods that have been used by researchers to analyse accidents at work in mining. In the empirical part (the second part of the paper), the authors present the results of their own econometric analysis. The authors use econometric models in predicting the indicator (W*) – total number of people injured in accidents per thousand employees. Testing classical econometric models, the authors obtained the best forecasts (based on the obtained forecast errors) in the Winters' model and the Brown's model. The accident at work in mining is an important topic for research because the branch of industry belongs to the branch with hard work. Health and safety in mines has a great importance for the sake of specific conditions in that kind of industry. Continuous analysis of accidents at work is necessary in evaluation of system effectiveness of health and safety system in all mines. Forecasting of accident at work can help miners to build safety in mines","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42943603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reconsidering measurement of absorptive capacity in the case of knowledge transfer from Nordic to the Baltic countries 重新考虑从北欧到波罗的海国家的知识转移中吸收能力的测量

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.18

{"title":"Reconsidering measurement of absorptive capacity in the case of knowledge transfer from Nordic to the Baltic countries","authors":"","doi":"10.46544/ams.v27i3.18","DOIUrl":"https://doi.org/10.46544/ams.v27i3.18","url":null,"abstract":"Knowledge transfer and benefits from spillover are one of the most desirable expectations from FDI and/or collaborations between domestic and foreign capital companies. However, the company may gain knowledge from collaboration if it has abilities properly to use knowledge or technologies that are accessible. The goal of the article is to provide a measurement tool for absorptive capacity. The study focuses on the collaboration between Nordic and Baltic countries. Thus, the targeting companies for research have been chosen as either Nordic capital companies operating in Lithuania and Estonia or domestic companies with an international relationship with Nordic capital companies. The article contributes to the theory of absorptive capacity and to the theory of internalization as well. The construct has been validated, and reliability has been estimated while testing 158 companies. The proposed measurement construct can be instrumental for further research of knowledge transfer from international collaborating companies of different capital origins for the mining industry sector since raw materials industries encounter new performance challenges in the context of the war in Ukraine, which caused a severe energy crisis.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41532230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increasing the efficiency of operating time and reducing maintenance time of transport systems 提高运输系统的运行时间效率，减少运输系统的维护时间

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.12

{"title":"Increasing the efficiency of operating time and reducing maintenance time of transport systems","authors":"","doi":"10.46544/ams.v27i3.12","DOIUrl":"https://doi.org/10.46544/ams.v27i3.12","url":null,"abstract":"The Gremikhinsky oil field contains heavy-grade, high-sulfur, high-resinous, paraffin-base crude oil, and the produced reservoir fluid is highly corrosive. All this results in the formation of asphaltene-resin-paraffin deposits (ARPD) and stable oil-water emulsions, which in turn leads to premature failure of downhole pumping equipment. In this work, the scope of measures to prevent malfunctions of pumping units is considered. The use of the SONKOR-9701 inhibitor through a special design of the ESP power cable with a capillary conveying line for supplying the chemical reagent to the reception delivers the chemical reagent directly to the required entry point with the most effective dosage and ensures a prompt change of the dosage and type of the reagent. With this technology, the reagent is not consumed for the repletion of the oil column in the annular space; its adsorption is on the surface of the casing and tubing. Thus, the reagent targeted with just specific technological causes and the greatest effect is ensured. Due to the introduction of a special cable with a capillary conveying line, it is planned to increase the average operating time for failure and, consequently, reduce the maintenance job at the Gremikhinsky oil field. It is also predicted the additional volume of extraction because of a special submersible cable device (SSCD), as well as by increasing the delivery (capacity) rate of the pump.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45420745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of a hardbanding material for drill pipes based on high-manganese steel reinforced with complex carbides 复合碳化物增强高锰钢钻杆硬带材料的研制

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.09

{"title":"Development of a hardbanding material for drill pipes based on high-manganese steel reinforced with complex carbides","authors":"","doi":"10.46544/ams.v27i3.09","DOIUrl":"https://doi.org/10.46544/ams.v27i3.09","url":null,"abstract":"In the present study the new “casing-friendly” hardbanding alloy based on high-manganese steel reinforced with complex carbide particles was developed by combining thermodynamic modelling within the CALPHAD approach and first-principles calculations. The alloy, deposited by flux cored arc welding on a steel substrate, has a composite structure consisting of manganese-austenite with the ability to work hardening, fine (up to 5 µm) inclusions of the multicomponent carbide (Nb, Ti, Mo, V) and C the thin layers of (Mo,V)C at the austenite grain boundaries. The comparative wear tests carried out with commercially available hardfacing materials of the Fe-W-C and Fe-Cr-C systems showed that the proposed alloy has the best combination of properties preventing the wear of the drill casing, while its abrasion resistance as well as wear resistance in sliding friction conditions by steel counterbody is close to hypereutectic high chromium alloys. The microhardness tests performed on deformed specimen areas after the friction tests show the presence of a significant hardness gradient in the range of 800-450 HV at a distance of about 300 µm when moving perpendicularly away from the zone of friction contact. During the microscopic observation of the layer deposited with the developed alloy and the interfaces between the deposit and the base steel no cracks, pores delamination were detected indicating a strong metallurgical bonding. The hardbanding process was performed for drill pipe joints with the worn Fe-based high chromium alloy hardbanding after exploitation, which allows the drill pipe to be reused with the same durability.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43530360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Effects of Climate and Oil Prices on Residential Natural Gas Prices: With an Application to 11 OECD Countries 气候和石油价格对居民天然气价格的影响:以11个经合组织国家为例

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.11

引用次数: 0

An economic assessment of agricultural brownfield revitalization – A case study of Eastern Slovakia 农业棕地振兴的经济评估——以斯洛伐克东部为例

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.13

引用次数: 0

Observations of the oil-polluted soil of Absheron Peninsula using Landsat 8 OLI and Sentinel 2A imagery 使用Landsat 8 OLI和Sentinel 2A图像对Absheron半岛石油污染土壤的观测

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.04

{"title":"Observations of the oil-polluted soil of Absheron Peninsula using Landsat 8 OLI and Sentinel 2A imagery","authors":"","doi":"10.46544/ams.v27i3.04","DOIUrl":"https://doi.org/10.46544/ams.v27i3.04","url":null,"abstract":"The Absheron Peninsula is the biggest urbanized area in Azerbaijan. Along with the growth of the massive oil production, the role of the Peninsula has increased and big ecological problems have arisen. \u0000In this research, the investigation of the possibility of detecting hydrocarbons in sandy soil through Landsat 8 OLI and Sentinel 2 A satellite and drone images and chemical analysis was conducted. The main study was based on the satellite imagery of Landsat 8 OLI and Sentinel 2A, employing NDVI calculations and analyses. In order to calculate NDVI, ESRI ArcGIS 10.3 software has been used. The multispectral images with 30m spatial resolution of Landsat 8 and 10 m resolution multispectral images of Sentinel 2 were used. Additionally, drone observations lead to obtaining high-resolution data about soil pollution in the study area. Also, field samples were taken to the laboratory and necessary chemical analysis was performed for validation purposes. \u0000This study showed that multispectral remote sensing can be used to detect hydrocarbons in the soil in oil production areas. Hydrocarbon-bearing substances’ absorption into the soil results in a low value of NDVI in the study area. The observations in the winter and summer seasons show that the seasonal changes in weather conditions affect both the amount of oil contamination in the soil and the detection process of soil pollution by oil using remote sensing.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44129784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing for Convergence Innovation and Club Clustering in Selected Economies 1995-2017 1995-2017年选定经济体的融合创新和俱乐部集群测试

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.16

{"title":"Testing for Convergence Innovation and Club Clustering in Selected Economies 1995-2017","authors":"","doi":"10.46544/ams.v27i3.16","DOIUrl":"https://doi.org/10.46544/ams.v27i3.16","url":null,"abstract":"Innovation convergence is a deterministic process resulting from the change in micro and macro innovation determinants. It is characterized by firms' search for innovative opportunities in other economic sectors and in their development from mining through heavy industry to material processing sector, discovering new technologies that connect individual products to a more integrated global system, diversifying, ensuring technical scope growth, and start-ups contributing to new managerial leadership. The aim of this study is to contribute to our knowledge of convergence innovation by providing empirical evidence on it. To this purpose, we use a nonlinear time-varying factor model to test for convergence innovation and countries' club clustering. For the sample of 29 countries from 1995 to 2017, we identify two significant convergence clubs and one divergent group (Cyprus, Czech Republic, and The Netherlands). The empirical evidence indicates that innovation singularity could appear as a significant barrier and limiting factors for firms' and countries' growth in the future. Design and new product development trends in these countries follow a different decoupling path from the rest of the sample. Policymakers and practitioners should carefully evaluate innovation determinants and constraints (decoupling drivers) in setting up innovation policies on a micro and macro level.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44783715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applying CFD Model Studies to Determine Zones at Risk of Methane Explosion and Spontaneous Combustion of Coal in Goaves 应用CFD模型研究确定煤层甲烷爆炸和自燃危险区

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.07

{"title":"Applying CFD Model Studies to Determine Zones at Risk of Methane Explosion and Spontaneous Combustion of Coal in Goaves","authors":"","doi":"10.46544/ams.v27i3.07","DOIUrl":"https://doi.org/10.46544/ams.v27i3.07","url":null,"abstract":"Underground mining operations are subject to a number of natural hazards. Events resulting from these hazards are difficult to predict, and if they occur, they disrupt the entire mining process and pose a great danger to the crew. Some of the most dangerous include ventilation hazards involving methane explosions and fires caused by the spontaneous combustion of coal. The complex state of the underground environment means that these hazards oftentimes occur simultaneously, making mining conditions even worse. The following paper addresses this issue by developing methodology for determining areas endangered by methane explosions and coal spontaneous combustion in goaves. The reference to goaves results from the fact that this particular area is most frequently affected by coal spontaneous combustion and accumulation of dangerous amounts of methane. The developed methodology was based on model tests with the use of the CFD method and data necessary to develop a numerical model. The research encompassed a real longwall in one of the hard coal mines, ventilated with the Y system during its exploitation, which is beneficial in the case of the methane hazard but worsens the safety in terms of the self-ignition of coal. As a result of the conducted research, for the exploitation conditions, dangerous zones were specified due to a potential possibility of methane explosion and self-heating of coal. The basis for determining dangerous zones were the criteria of occurrence of the examined phenomena. In this study, the zones were identified for each of the investigated hazards separately and for their simultaneous occurrence. Thus, the aim of the study, which involved the determination of potentially hazardous zones by applying modern methods of modelling in the mining area, was achieved. The results are an immensely important source of information for activities aimed at improving safety in the studied area, in relation to the studied threats.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44618004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Implementation of business intelligence system to analyze the data for mining mechanization – case study 实现商业智能系统对采矿机械化数据的分析——案例研究

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2022-12-08 DOI: 10.46544/ams.v27i3.14

{"title":"Implementation of business intelligence system to analyze the data for mining mechanization – case study","authors":"","doi":"10.46544/ams.v27i3.14","DOIUrl":"https://doi.org/10.46544/ams.v27i3.14","url":null,"abstract":"In this article, we focused on the experimental implementation of the Power BI application in the field of mining mechanization. This application was created to demonstrate how an interactive data visualization tool can streamline data exploration and provide new insights that can be used to optimize selected processes. The monitored company uses a large number of reports in connection with the organization of the company. They collect many data from the attendance system and the electronic resource planning system, but also a lot of operational data related to the performance of mining mechanization. These data are evaluated in the company only at one-month intervals. Our intention was to transform the data for the year 2021 and create various visual reports through the power BI program, which, thanks to detailed analysis and evaluation, will help to improve the management of mining mechanization. The source of information in our case were tables that contained very poorly arranged data that could not be imported into the Power BI program in the given state.\u0000After collecting the data, we had to transform them, which was a very time-consuming process. Due to limited resources, we had to adjust our original plan. From the entire portfolio of mining mechanization, which consists mainly of mining drills, loaders and trucks, we decided to only process data from mining trucks. The result will be a demonstration of the usability of the power BI system in a mining company to manage information related to mining trucks, but the same approach can be used for all types of mining mechanisms. Implementation of the power BI system was performed on data from one of the biggest underground mines in Slovakia.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45853649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0