Mining Revue最新文献_第5页

Conceptualization and Quantitative Assessment of Risk Associated with Explosives 爆炸物相关风险的概念化和定量评估

Mining Revue Pub Date : 2022-12-01 DOI: 10.2478/minrv-2022-0031

V. Vasilescu, R. Moraru

引用次数: 0

Research on the Quality of the Soil and the Land Related to the Mining Perimeters in Valea Jiului 九雷河谷矿区周边土壤及土地质量研究

Mining Revue Pub Date : 2022-12-01 DOI: 10.2478/minrv-2022-0025

L. Roman, M. Georgescu

引用次数: 0

Studies on Lignite Quality Depending on Storage Conditions 贮存条件对褐煤品质影响的研究

Mining Revue Pub Date : 2022-12-01 DOI: 10.2478/minrv-2022-0026

Vasile Bobei, D. Ciolea

{"title":"Studies on Lignite Quality Depending on Storage Conditions","authors":"Vasile Bobei, D. Ciolea","doi":"10.2478/minrv-2022-0026","DOIUrl":"https://doi.org/10.2478/minrv-2022-0026","url":null,"abstract":"Abstract A small increase in the relative humidity in the air in a coal deposit can cause a 1% increase in the moisture content of the deposit resulting in the probability of spontaneous ignition. By depositing the freshly extracted coal over the coal already in the deposit, there is a direct contact between the two surfaces that have different characteristics in terms of physical and chemical properties, so that the latter acts as a primer. The coal with a higher temperature gives up the excess temperature to the coal with a lower temperature, thus initiating the formation of self-heating nuclei followed by self-ignition ones. The phenomenon is easy to observe in the colder periods of the season and especially usually after rain, when the vapors resulting from the exchange of temperature between the two types of coal are released into the atmosphere. The common cause is the movement of water vapor through the deposit correlated with the adsorption on the coal granules. The heat of condensation of vapor at storage temperature is about 580 cal./gram of water. Condensing the amount of water required to increase the content from 3% of the weight of the coal to 4% leads to an increase in the temperature of the coal by more than 170C. This increase in temperature is sufficient to increase the oxidation rate by 5 times.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"49 1","pages":"14 - 23"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72825262","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

Analysis of the Influence of the Vertical Coaxiality of the Pillars on the Stability of the Resistance Structures, from the Ocnele Mari Saline 矿柱垂直同轴度对阻力结构稳定性的影响分析——以海星岩为例

Mining Revue Pub Date : 2022-12-01 DOI: 10.2478/minrv-2022-0029

D. Marian, I. Onica, Ovidiu Marina

引用次数: 0

Assessment of the Tilt Phenomenon and the Tilt Distance of the Land as an Effect of Coal Mining, Jiu Valley Basin, Romania 罗马尼亚久谷盆地煤炭开采对土地倾斜现象及倾斜距离的影响

Mining Revue Pub Date : 2022-09-01 DOI: 10.2478/minrv-2022-0018

M. Herbei, R. Herbei, F. Sala

{"title":"Assessment of the Tilt Phenomenon and the Tilt Distance of the Land as an Effect of Coal Mining, Jiu Valley Basin, Romania","authors":"M. Herbei, R. Herbei, F. Sala","doi":"10.2478/minrv-2022-0018","DOIUrl":"https://doi.org/10.2478/minrv-2022-0018","url":null,"abstract":"Abstract The aim of the study was to evaluate the phenomenon of land tilting and the tilting distance as a secondary effect of surface coal mining in the Jiu Valley area, Romania. To evaluate the tilting phenomenon, through the two considered elements (inclination – Lt, tilting distance – Td) 16 control points (CP1 to CP16) were used whose coordinates were measured in the Stereographic 1970 projection system, the 1975 Black Sea elevation system at an initial moment (t0) and at the current moment (t1). The static method was used by GPS technology to measure the elevations of the control points. Through descriptive statistical analysis, a general characterization of the set of recorded values was obtained, and the ANOVA test confirmed the safety of the data and the presence of variance in the data set. From the analysis of the recorded values, a Spline type model was obtained that described the variation of Lt in relation to Td, under conditions of statistical safety ( ɛ¯ = 0.137302). Regression analysis facilitated the obtaining of equation-type models, which described the variation of Lt and Td in relation to the X, Y and Z coordinates of the control points (t0, t1), under conditions of statistical certainty (R2 = 0.697, p=0.014 for Td variation according to Z0 and Z1; R2 = 0.722, p=0.0094 for Td in relation to X0 and Z0). According to PCA, PC1 explained 61.303% of variance, and PC2 explained 38.697% of variance. The cluster analysis facilitated the obtaining of a dendrogram based on Euclidean distances, regarding the grouping based on the similarity of the control points in relation to the studied phenomenon, under conditions of statistical safety (Coph. corr.=0.957).","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"38 1","pages":"28 - 38"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81884715","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

Finite Element Analysis of a Cutting and Hauling Mining Adapter 一种切割牵引式采矿接头的有限元分析

Mining Revue Pub Date : 2022-09-01 DOI: 10.2478/minrv-2022-0017

Z. Virág

引用次数: 0

Research on Fog Guns for Dust Reduction at Coal Field – Roșiuța Quarry 煤田降尘用雾枪的研究- Roșiuța采石场

Mining Revue Pub Date : 2022-09-01 DOI: 10.2478/minrv-2022-0019

D. Ciolea, Vasile Bobei, Marius Berca

引用次数: 0

The Use of Drones in Mining Operations 无人机在采矿作业中的应用

Mining Revue Pub Date : 2022-09-01 DOI: 10.2478/minrv-2022-0023

Gheorghe Marian Vangu

引用次数: 1

Researches on Mining Cadastre: Past, Present and Future Perspectives. The Case of a Former Mining Town: Borșa, Maramureș County 矿业地籍研究:过去、现在与未来。一个前矿业小镇的案例:Borșa，马拉穆鲁斯县

Mining Revue Pub Date : 2022-09-01 DOI: 10.2478/minrv-2022-0022

I. Boroica, Marius Cucăilă, Simona Cucăilă, N. Dima

{"title":"Researches on Mining Cadastre: Past, Present and Future Perspectives. The Case of a Former Mining Town: Borșa, Maramureș County","authors":"I. Boroica, Marius Cucăilă, Simona Cucăilă, N. Dima","doi":"10.2478/minrv-2022-0022","DOIUrl":"https://doi.org/10.2478/minrv-2022-0022","url":null,"abstract":"Abstract After the cessation of mining activities, concerns for mining cadastre research are only sporadic. The present study aims at bringing up to date the evolution of the mining cadastre in the Romanian provinces with a mining book regime, territories that were until 1918 within the structure of the former Habsburg Empire. (Austro-Hungary since 1867). Several stages can be distinguished in the evolution of the mining cadastre in the areas shown. From the 16th century until 1854 the principles and methods of the mining cadastre were set up. Between 1854 and 1924 the provisions of the Austrian General Mining Law of 1854 were followed. From 1924 to 1948, the mining cadastre provisions provided for in the mining law of 1924 and other specific regulations are applicable. After 1948, under the conditions of a statist regime, the mining record did not respect the principles of the mining cadastre previously assessed. After 1990, the new mining cadastre only partially takes over the classical principles and methods of the mining cadastre. The way of applying the mining cadastre was focused upon in the town of Borșa, a mountainous place where farmers had not formed cooperatives and where intensive mining was carried out until 2007. With the cessation of mining in Baia Borșa, the mining cadastre was reduced to inventories of some mining assets and sporadic cadastre registrations of some premises and settling ponds. The study analyzes the current situation and proposes some integrated solutions, mediated by GIS technology, aiming the introduction of the mining cadastre in correlation with the introduction of the general cadastre. In this context, GIS technology offers modeling tools that, for example, can assess the degree of suitability of the land for construction.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"43 1","pages":"65 - 72"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88547905","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

Aspects Regarding the Use of Coal in the Production of Electrical and Thermal Energy 煤炭在电力和热能生产中的应用问题

Mining Revue Pub Date : 2022-09-01 DOI: 10.2478/minrv-2022-0021

Vasile Bobei, D. Ciolea

引用次数: 0