Proceedings of the Tula States University-Sciences of Earth最新文献_第9页

SIMPLIFICATION POSSIBILITIES FOR COUPLED THM MODELS OF ARTIFICIAL GROUND FREEZING IN THE CONSTRUCTION OF MINE SHAFTS 矿井人工冻结耦合THM模型的简化可能性

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-453-463

M. Semin

{"title":"SIMPLIFICATION POSSIBILITIES FOR COUPLED THM MODELS OF ARTIFICIAL GROUND FREEZING IN THE CONSTRUCTION OF MINE SHAFTS","authors":"M. Semin","doi":"10.46689/2218-5194-2021-4-1-453-463","DOIUrl":"https://doi.org/10.46689/2218-5194-2021-4-1-453-463","url":null,"abstract":"An important stage in the design of the artificial ground freezing during the construc-tion of mine shafts (and other underground structures) is the simulation of deformation and heat transfer in the media to be frozen. This is necessary to calculate the required thicknesses of frozen wall, the time of its formation and the parameters of freezing stations. The choice of an adequate mathematical model is impossible without analyzing the significance and coupling of various physical processes occurring during the freezing of soil. Such an analysis allows se-lecting a reasonable degree of detailing of physical processes in the model: take into account all important factors and neglect the rest. This article proposes a methodology for analyzing the significance and coupling of such physical processes. For this, a general thermo-hydro-mechanical model of soil freezing has been formulated, a set of dimensionless complexes has been identified and classified, which determine the relationship between various physical pro-cesses. The transition from the general thermo-hydro-mechanical model to simpler models is possible only if the corresponding dimensionless complexes are small.","PeriodicalId":41869,"journal":{"name":"Proceedings of the Tula States University-Sciences of Earth","volume":"1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70574405","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}

引用次数: 0

NORMALIZATION OF THE TEMPERATURE REGIME UNDER THE CONDITIONS OF THE HEATING MICROCLIMATE OF MINES 矿井采暖小气候条件下温度状态的归一化

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-145-158

A. Zaitsev, D. Borodavkin, I. Polyakov, E. Vlasova

引用次数: 0

EXPERIENCE AND COMPARATIVE ANALYSIS OF OPERATING EFFICIENCY OF DIESEL AND ELECTRIC LOADING AND DELIVERY MACHINES 柴油机和电动装卸机运行效率的经验和对比分析

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-246-257

A. Bondarenko, R. Sharipov

引用次数: 0

RESOURCE SAVING IN THE EXTRACTION OF NON-FERROUS METALS 有色金属提取中的资源节约

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-313-322

V. Golik

引用次数: 0

RESEARCH OF ELECTRIC POWER QUALITY OF TRACTION SUBSTATIONS OF A HIGH MOUNTAIN MINER 某高山煤矿牵引变电所电能质量研究

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-399-415

R. Klyuev, O. Fomenko, I. Bosikov, O. Gavrina

{"title":"RESEARCH OF ELECTRIC POWER QUALITY OF TRACTION SUBSTATIONS OF A HIGH MOUNTAIN MINER","authors":"R. Klyuev, O. Fomenko, I. Bosikov, O. Gavrina","doi":"10.46689/2218-5194-2021-4-1-399-415","DOIUrl":"https://doi.org/10.46689/2218-5194-2021-4-1-399-415","url":null,"abstract":"The paper presents a methodology for researching the levels of higher harmonic in networks with a voltage of 6 kV and developed measures to eliminate harmonics of the non-canonical series. According to the results of the research, it was found that the sources of high-er harmonic ones are the ATP-500 traction substations, connected to the 6 kV network in groups and alone. In the 6 kV network, the 3rd, 5th, 7th and 11th harmonics of the canonical series, as well as the 3rd, 4th, 6th and 8th harmonics of the non-canonical series, are distin-guished, the levels of which significantly exceed the permissible levels according to GOST. The presence of non-canonical harmonics is caused by the asymmetry of the bridge circuit (current asymmetry relative to the abscissa axis). An instruction has been developed for the pre-start check of the bridge circuit gates to eliminate asymmetry. The prevalence of 5 and 7 higher harmonics in the 6 kV network was established and it was recommended to take into account the possibility of resonance phenomena in the pulse-phase control circuits of electric drives connected to the 6 kV network of the mine and open pit. The implementation of the recommen-dations set forth in the work increases the reliability of the bridge circuits of traction substa-tions and eliminates the possibility of the appearance of non-canonical harmonics, which im-proves the voltage quality in accordance with the requirements of GOST.","PeriodicalId":41869,"journal":{"name":"Proceedings of the Tula States University-Sciences of Earth","volume":"1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70573702","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}

引用次数: 1

IMPROVEMENT OF THE TECHNOLOGY OF DEVELOPMENT OF RESERVES OF THE EMISSION-HAZARDOUS FORMATION OF THE КРII STRATUM IN THE CONDITIONS OF THE EUROCHEM USOLSKIY POTASH MINE 以欧化乌索利斯基钾肥矿为例，改进КРii地层排放危险层储量开发技术

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-416-424

A. P. Klyucharev, N. Litvinovskaya

引用次数: 0

ASSESSMENT OF THE PROSPECTS OF USING INDUSTRIAL EXOSKELETONS TO REDUCE LABOR IN THE COAL INDUSTRY 利用工业外骨骼减少煤炭工业劳动力的前景评估

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-209-222

S. Gendler, M. V. Tumanov, E. Prokhorova, V. G. Shеkhmanov

引用次数: 0

SOCIAL AND POLITICAL EFFECTS OF THE COVID-19 PANDEMIC IN RUSSIA: RESULTS OF A STUDY WITHIN THE FRAMEWORK OF THE "WORLD INTERNET PROJECT - 2021" 2019冠状病毒病大流行对俄罗斯的社会和政治影响:“世界互联网项目- 2021”框架内的研究结果

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-3-13

I. Batanina, E. Brodovskaya, A. Dombrovskaya, R. Parma

{"title":"SOCIAL AND POLITICAL EFFECTS OF THE COVID-19 PANDEMIC IN RUSSIA: RESULTS OF A STUDY WITHIN THE FRAMEWORK OF THE \"WORLD INTERNET PROJECT - 2021\"","authors":"I. Batanina, E. Brodovskaya, A. Dombrovskaya, R. Parma","doi":"10.46689/2218-5194-2021-4-1-3-13","DOIUrl":"https://doi.org/10.46689/2218-5194-2021-4-1-3-13","url":null,"abstract":"The results of the All-Russian survey on the social well-being of citizens in the con-text of the spread of the COVID-19 pandemic are presented. The baseline results were con-clusions about changes in Russians 'offline and online consumer behavior, social expecta-tions, fears and citizens' perception of universal vaccination as a measure to combat the COVID-19 pandemic. The study showed that three types of fears prevail among Russians: coronavirus infection of relatives and friends, their own illness when they do not receive the necessary medical care, and a drop in income (worsening living conditions) amid an uncon-trollably spreading pandemic. The analysis of the survey database showed the activation of digital behavior of citizens in the context of the pandemic, which became a favorable factor in the development of online retail. Against the background of the spread of the COVID-19 vi-rus, the age structure of the Russian national audience is changing, and the digital gap be-tween generations is gradually being bridged. The pandemic triggered the involvement of older people in the digital space. Cluster analysis of the research data made it possible to segment Russians into three groups in relation to the pandemic and measures to overcome it: covid-pessimists, who suffered the most from the restrictions of the corona virus and did not adapt to life under conditions of covid-restrictions; covid-optimists who have successfully adapted to new circumstances in connection with the spread of the COVID-19 virus; covid-realists focused on constructively overcoming the negative consequences of restrictive pandemic measures. Their socio-demographic and behavioral characteristics have been ana-lyzed, and the specificity of the civic position of representatives of various clusters of Rus-sians has been established.","PeriodicalId":41869,"journal":{"name":"Proceedings of the Tula States University-Sciences of Earth","volume":"1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70573227","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}

引用次数: 1

PROBLEMS OF ORE PREPARATION FOR HEAP LEACHING 堆浸选矿的若干问题

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-322-330

V. Golik

引用次数: 1

ANALYSIS OF CONTROLLED COAL DISCHARGE AT MINING OF THICK FLAT COAL SEAMS USING SELF-CAVING TECHNOLOGY 厚扁平煤层自崩落开采控制排煤分析

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Proceedings of the Tula States University-Sciences of Earth Pub Date : 2021-01-01 DOI: 10.46689/2218-5194-2021-4-1-389-399

S. Klishin

引用次数: 0