Journal of Sustainable Mining最新文献_第9页

Accident Analysis of Mining Industry in the United States – A retrospective study for 36 years 美国采矿业事故分析——36年的回顾性研究

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Journal of Sustainable Mining Pub Date : 2022-02-16 DOI: 10.46873/2300-3960.1345

E. Rahimi, Y. Shekarian, N. Shekarian, P. Roghanchi

引用次数: 4

Investigating the effectiveness of a ground support system implemented on Block A: A case study of Southern Africa Metalliferous Mine 调查a区块实施地面支持系统的有效性:以南部非洲金属矿为例

IF 1

Journal of Sustainable Mining Pub Date : 2022-01-08 DOI: 10.46873/2300-3960.1344

K. Manyelo, Peter Kolapo

{"title":"Investigating the effectiveness of a ground support system implemented on Block A: A case study of Southern Africa Metalliferous Mine","authors":"K. Manyelo, Peter Kolapo","doi":"10.46873/2300-3960.1344","DOIUrl":"https://doi.org/10.46873/2300-3960.1344","url":null,"abstract":"This study aims to investigate the effectiveness of the ground support systems that are planned to be implemented on Block A, which will be excavated through the Marikana fault zone. The block of ground being prepared for mining has been physically affected by the presence of the Marikana fault and is therefore geomechanically and geotechnically weaker than the normal stoping conditions on the rest of the shaft. Data collected during the raiselines mapping was used as input into the numerical modelling software (Dips and JBlock), which indicated a major scatter of joint orientations in Block A. Shallow dipping orientations of 276 /14 , 174 /11 and 69 /14 were observed. An average RMR below 50 was calculated from the field mapping data which indicates that the quality of the rockmass in Block A is relatively poor and pose the risk of rock falls due to high probability of unstable rocks. Jblock simulations were performed to estimate the load bearing capacity of the roof bolts. The simulation results showed that the probability of failure reduced to 26% at a loading capacity of 160 kN as opposed to a 60% probability using 100 kN capacity. Likewise, the probability of block failure for 1 m blocks and the maximum support failure decreased to 27% and 5% respectively. The area simulated is a stoping panel with a 15 m face length and a 30 m back length. A total number of 10 000 keyblocks were generated and the probability of failure was highest for 1 m at a 60% in between support. The JBlock analysis shows that the support spacing implemented at Mine A does not sufficiently account for all rockfalls that can occur due to keyblock formation in the hangingwall. In order to effectively support the unstable ground, it is recommended that longer grouted coupling roof bolts of 2 m length spaced at 1 £ 1.2 m should be installed, as opposed to the current mechanical end-anchors (ungrouted) of 1.6 m length spaced at 1.5 m £ 1.5 m.","PeriodicalId":37284,"journal":{"name":"Journal of Sustainable Mining","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74849918","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

Application of Entropy Method for Estimating Factor Weights in Mining-Method Selection for Development of Novel Mining-Method Selection System 应用熵法估算因子权重在采矿方法选择中的应用，开发新型采矿方法选择系统

IF 1

Journal of Sustainable Mining Pub Date : 2022-01-08 DOI: 10.46873/2300-3960.1328

Elsa Pansilvania Andre Manjate, Mahdi Saadat, H. Toriya, Fumiaki Inagaki, Y. Kawamura

{"title":"Application of Entropy Method for Estimating Factor Weights in Mining-Method Selection for Development of Novel Mining-Method Selection System","authors":"Elsa Pansilvania Andre Manjate, Mahdi Saadat, H. Toriya, Fumiaki Inagaki, Y. Kawamura","doi":"10.46873/2300-3960.1328","DOIUrl":"https://doi.org/10.46873/2300-3960.1328","url":null,"abstract":"Mining-method selection (MMS) is one of the most critical and complex decision-making processes in mine planning. Therefore, it has been a subject of several studies for many years culminating with the development of different systems. However, there is still more to be done to improve and/or create more efficient systems and deal with the complexity caused by many influencing factors. This study introduces the application of the entropy method for feature selection, i.e., select the most critical factors in MMS. The entropy method is applied to assess the relative importance of the factors influencing MMS by estimating their objective weights to then select the most critical. Based on the results, ore strength, host-rock strength, thickness, shape, dip, ore uniformity, mining costs, and dilution were identified as the most critical factors. This study adopts the entropy method in the data preparation step (i.e., feature selection) for developing a novelMMS system that employs recommendation system technologies. The most critical factors will be used as main variables to create the dataset to serve as a basis for developing the model for the novel-MMS system. This study is a key step to optimize the performance of the model.","PeriodicalId":37284,"journal":{"name":"Journal of Sustainable Mining","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77916622","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

The use of microalgal sourced biodiesel to help underground mines transition to battery electric vehicles 利用微藻来源的生物柴油帮助地下矿山过渡到电池电动汽车

IF 1

Journal of Sustainable Mining Pub Date : 2022-01-08 DOI: 10.46873/2300-3960.1327

Corey A Laamanen, K. Moreau, S. Desjardins, Shannon H. McLean, J. A. Scott

{"title":"The use of microalgal sourced biodiesel to help underground mines transition to battery electric vehicles","authors":"Corey A Laamanen, K. Moreau, S. Desjardins, Shannon H. McLean, J. A. Scott","doi":"10.46873/2300-3960.1327","DOIUrl":"https://doi.org/10.46873/2300-3960.1327","url":null,"abstract":"The widespread use of fossil fuel sourced diesel underground has various associated health and environmental hazards, and additional energy demand and costs associated with necessary ventilation. One way to reduce these impacts is by utilizing a biodiesel-blend, which generates lower levels of harmful emissions from underground equipment and can be produced regionally, reducing the impact of transportation. Furthermore, this would help allow use of existing machinery during transition towards more widespread electrification underground. Therefore, the concept of an integrated supply and use chain within the mining industry is examined based on biodiesel from acidophilic photosynthetic microalgae cultivated using CO2 in smelter off-gas. A life cycle assessment (LCA) was conducted to compare the environmental impacts of production, transportation, and end-use of fossil fuel sourced diesel to biodiesel-blended fuel across four underground metal ore mine sites (Canada, Poland, Zambia, and Australia). The outcomes from assessing four key environmental impact potentials (global warming, eutrophication, acidification and human toxicity) demonstrate the advantages of using biodiesel-blends. The integration of biodiesel resulted in changes from ¡22.5 to þ22.8% (global warming), from ¡18.9 to þ26.3% (acidification), from ¡6.1 to þ27.3% (eutrophication), and from ¡21.0 to ¡3.6% (human toxicity). The results showed reduction across all potentials for two mines and reduction in human toxicity potential for all sites.","PeriodicalId":37284,"journal":{"name":"Journal of Sustainable Mining","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87227286","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

Sources and techniques of domestic heating within TRITIA region TRITIA地区家庭供暖的来源和技术

IF 1

Journal of Sustainable Mining Pub Date : 2022-01-03 DOI: 10.46873/2300-3960.1330

M. Wysocka, K. Skubacz, K. Samolej

引用次数: 0

Modelling the throttle effect in a mine drift 矿井巷道中节流效应的模拟

IF 1

Journal of Sustainable Mining Pub Date : 2022-01-01 DOI: 10.46873/2300-3960.1329

R. Hansen

引用次数: 2

Study of the relationship of tidal changes in gravity with the time of mining tremors in the area of the mining longwall in a coal mine – case study in USCB, Poland 煤矿采动长壁区重力潮汐变化与采动时间的关系研究——以波兰USCB为例

IF 1

Journal of Sustainable Mining Pub Date : 2021-11-25 DOI: 10.46873/2300-3960.1325

Sławomir Siwek

{"title":"Study of the relationship of tidal changes in gravity with the time of mining tremors in the area of the mining longwall in a coal mine – case study in USCB, Poland","authors":"Sławomir Siwek","doi":"10.46873/2300-3960.1325","DOIUrl":"https://doi.org/10.46873/2300-3960.1325","url":null,"abstract":"Deep mining of coal deposits in Upper Silesia Coal Basin in Poland over several hundred years has led to disturbances in the natural state of equilibrium. As a result of changes in stress distribution, mass distribution (changes in gravity forces) and deformation of the rock mass, seismic tremors with energy reaching up to 10Eþ09J are generated. In this paper, the time of mining tremors occurrence is linked with changes in the gravitational load of the rock mass caused by lithosphere tides, which are considered to be one of the factors leading to occurrence of natural seismic tremors. The analysis used data on tremors in the immediate vicinity of the longwall VIII E-E1 in seam 703/1 located in the northeastern part of the Rydułtowy I mining area, whose mining user is ROW Mine Mining Plant Rydułtowy. These data was compared with data recorded by gPhoneX-155 tidal gravimeter which measures changes in gravity acceleration. Gravimeter gPhoneX-155 is installed on the stand in the Industrial Cultural Center of Ignacy Mine in Rybnik-Niewiadom, within a few hundred meters of the longwall VIII E-E1. The results obtained in the paper indicate a relationship between changes in gravitational load known as lithosphere tides and the time of longwall mining-induced tremors. At the same time, no periodicity was found in the tremors catalog allowing to link them directly to lithosphere","PeriodicalId":37284,"journal":{"name":"Journal of Sustainable Mining","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72651453","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

Gravity field changes during deep exploitation of the coal longwall and their relation to stress distribution and seismic activity 煤长壁深部开采过程中重力场变化及其与应力分布和地震活动的关系

IF 1

Journal of Sustainable Mining Pub Date : 2021-11-25 DOI: 10.46873/2300-3960.1326

Łukasz Kortas

{"title":"Gravity field changes during deep exploitation of the coal longwall and their relation to stress distribution and seismic activity","authors":"Łukasz Kortas","doi":"10.46873/2300-3960.1326","DOIUrl":"https://doi.org/10.46873/2300-3960.1326","url":null,"abstract":"Mining operations cause volumetric deformations within the rock mass and changes in its density, to which the gravimetric method is sensitive. These changes are particularly well seen in periodic measurements of the local gravity field. The paper analyses the relationship between the movement of a longwall in a coal seam and the change in the distribution of the gravity field in time and space observed on the ground surface. Relative gravimetric measurements were carried out in six series between 2018 and 2020; before the start of coal extraction, with the progress of the longwall and after the cessation of mining. Collected data allowed differential maps of changes in gravity to be plotted. Differential anomalies between the subsequent measurement series, and the reference one were then analysed. The distribution and temporal variations of the anomalies suggest a relationship between changes in density distribution of the rock medium in the longwall overburden, and the change in the stress state in the rock mass caused by the passage of the longwall front. An attempt was made to relate the variability of the state of stresses in the longwall overburden to the intensity of seismic tremors with energy >10E4 J accompanying longwall exploitation.","PeriodicalId":37284,"journal":{"name":"Journal of Sustainable Mining","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81753135","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

Decarbonisation – Origins and Evolution of the Process on the European Level 脱碳-起源和演变的过程在欧洲层面

IF 1

Journal of Sustainable Mining Pub Date : 2021-11-17 DOI: 10.46873/2300-3960.1323

Sylwia Jarosławska-Sobór

{"title":"Decarbonisation – Origins and Evolution of the Process on the European Level","authors":"Sylwia Jarosławska-Sobór","doi":"10.46873/2300-3960.1323","DOIUrl":"https://doi.org/10.46873/2300-3960.1323","url":null,"abstract":"Decarbonisation of the european economy is one of the most important megatrends that will shape economic and social development in the coming years. This paper discusses the basic concepts of decarbonisation in terms of climate change, the history of this idea development and the legal basis introduced in the European Union, including key European documents and tools influencing the process, like ETS or CO2 emission allowances. Background on decarbonisation has been presented as a European roadmap to achieve a low-carbon economy in Europe. In the article the main assumptions of the EU strategy papers like Clean Energy for All Europeans or the European Green Deal are presented. Casus Silesia indicates the basic problematic issues that coal regions will have to tackle to due to the transition away from coal. For European societies, the new environmental policy of the European Commission means the intensification of activities to reduce greenhouse gas emissions and switching the economy to lowor zero-carbon energy sources and technologies. The decarbonisation of the economy is an ongoing process which has been gaining momentum in recent years. The coal transition is a huge challenge, particularly for Poland.","PeriodicalId":37284,"journal":{"name":"Journal of Sustainable Mining","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76653267","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

Determination of the stress-strain state of rock mass and zone of inelastic deformation around underground mine excavation using modern methods of numerical modelling 应用现代数值模拟方法确定地下矿山开挖围岩应力-应变状态及非弹性变形区

IF 1

Journal of Sustainable Mining Pub Date : 2021-10-09 DOI: 10.46873/2300-3960.1324

S. Ignatiev, A. Sudarikov, A. Imashev

引用次数: 2