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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2022-01-08 DOI: 10.46873/2300-3960.1328
Elsa Pansilvania Andre Manjate, Mahdi Saadat, H. Toriya, Fumiaki Inagaki, Y. Kawamura
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.
采矿方法选择是矿山规划中最关键、最复杂的决策过程之一。因此,多年来,它一直是几个研究的主题,最终发展了不同的系统。然而,在改进和/或创造更有效的系统和处理由许多影响因素造成的复杂性方面,仍有更多的工作要做。本研究介绍了熵值法在特征选择中的应用,即在MMS中选择最关键的因素。采用熵值法,通过估计各因素的客观权重,评估影响MMS的因素的相对重要性,从而选择最关键的因素。结果表明,矿石强度、主岩强度、厚度、形状、倾角、矿石均匀度、开采成本和贫化程度是最关键的影响因素。本研究在数据准备步骤(即特征选择)中采用熵值法开发了一个采用推荐系统技术的novelMMS系统。最关键的因素将被用作主要变量来创建数据集,作为开发novel-MMS系统模型的基础。该研究是优化模型性能的关键步骤。
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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2022-01-03 DOI: 10.46873/2300-3960.1330
M. Wysocka, K. Skubacz, K. Samolej
The paper presents the balance of energy consumption for domestic heating inOpole and Silesian Voivodship (Poland), divided into various media. The report was based on an analysis of approximately 250 documents containing low-carbon economyplans for individualmunicipalities (gminas). Theauthors compared the current situation in thesevoivodships and theirdistrictswith thestructureof theheatingsysteminPolandasawhole,basedondata fromtheCentralStatisticalOfficeof Poland. The data demonstrate that the use of coal-based energy media has not changed significantly over the years and around 55e60% of households with individual heating systems use this type of media. A much more favourable trend is found in large urban centres, where there is a high proportion of district heating. The most common of the lower-emitting fuels (LPG, natural gas, electricity, heat pumps) is natural gas, and the share of the remaining sources within this group are
本文介绍了波兰和西里西亚省(波兰)家庭供暖的能源消耗平衡,分为不同的媒介。该报告是基于对大约250份文件的分析,这些文件包含了各个城市(直辖市)的低碳经济计划。根据波兰中央统计局的数据,作者将这些城市及其所在地区的现状与波兰整个供暖系统的结构进行了比较。数据表明,多年来,以煤为基础的能源媒介的使用并没有显着变化,大约55e60%拥有独立供暖系统的家庭使用这种类型的媒介。在大城市中心发现了一个更有利的趋势,那里有很高比例的区域供热。最常见的低排放燃料(液化石油气、天然气、电力、热泵)是天然气,在这一组中其余来源的份额是
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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2022-01-01 DOI: 10.46873/2300-3960.1329
R. Hansen
The throttle effect is a phenomenon, which may occur during a fire underground, causing unforeseen smoke spread. This paper focuses on the modelling of the throttle effect in a mine drift, using a CFD software. The aim of the paper is to investigate whether the CFD tool is able to predict and reproduce the throttle effect for fire scenarios underground. Experimental data from fire experiments in a model-scale mine drift and modelling results from a CFD model were used during the analysis. It was found that the CFD model was not able to fully reproduce the throttle effect for fire scenarios in a mine drift. The inability was due to the under prediction of the fire gas temperature at the ceiling level and the over prediction of the temperatures at the lower levels. The difficulties occurred foremost during transient periods with high fire growth rates. Given the difficulties in modelling the thermal stratification and the throttle effect, the use of CFD models should be mainly for qualitative analysis. Quantitative analysis could possibly be performed for non-transient and low intensity fires.
节流效应是一种现象,它可能发生在地下火灾中,导致无法预料的烟雾蔓延。本文主要利用CFD软件对矿井巷道中的节流效应进行建模。本文的目的是研究CFD工具是否能够预测和再现地下火灾场景下的节流效应。采用模型尺度矿井巷道火灾试验数据和CFD模型模拟结果进行分析。结果表明,CFD模型不能完全再现矿井巷道火灾情景下的节流效应。这主要是由于对顶板温度的预测不足,而对下层温度的预测过高。困难主要发生在火生长速率高的过渡时期。考虑到热分层和节流效应建模的困难,CFD模型的使用应主要用于定性分析。可以对非瞬态和低强度火灾进行定量分析。
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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-11-25 DOI: 10.46873/2300-3960.1325
Sławomir Siwek
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
波兰上西里西亚煤盆地数百年来的深部开采导致了自然平衡状态的扰动。由于岩体的应力分布、质量分布(重力变化)和变形的变化,产生能量可达10e ~ 09j的地震震动。本文将矿震发生的时间与岩石圈潮汐引起的岩体重力载荷变化联系起来,认为这是导致自然地震发生的因素之一。分析使用了位于Rydułtowy I矿区东北部703/1煤层长壁VIII E-E1附近的地震数据,该矿区的采矿用户为ROW矿山工厂Rydułtowy。这些数据与测量重力加速度变化的gPhoneX-155潮汐重力仪记录的数据进行了比较。重力仪gPhoneX-155安装在Rybnik-Niewiadom的Ignacy矿山工业文化中心的展台上,距离长壁VIII E-E1只有几百米。本文的结果表明,重力载荷(即岩石圈潮汐)的变化与长壁采矿诱发地震的时间之间存在关系。与此同时,在地震目录中没有发现周期性,从而无法将它们直接与岩石圈联系起来
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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-11-25 DOI: 10.46873/2300-3960.1326
Łukasz Kortas
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.
采矿作业引起岩体内部的体积变形和密度变化,这是重力法很敏感的。这些变化在局部重力场的周期性测量中尤为明显。本文分析了煤层长壁移动与地表观测到的重力场时空分布变化之间的关系。在2018 - 2020年期间进行了6个系列的相对重力测量;采煤开始前,随着长壁的进展,采煤停止后。收集到的数据可以绘制出重力变化的差异图。然后分析了后续测量序列与参考序列之间的差异异常。这些异常的分布和时间变化表明,长壁覆岩中岩石介质密度分布的变化与长壁前缘通过引起的岩体应力状态的变化有关。试图将长壁覆岩应力状态的变化与长壁开采过程中能量> 10e4j的地震烈度联系起来。
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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-11-17 DOI: 10.46873/2300-3960.1323
Sylwia Jarosławska-Sobór
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.
欧洲经济的脱碳是影响未来几年经济和社会发展的最重要的大趋势之一。本文讨论了气候变化方面脱碳的基本概念,这一思想发展的历史和欧盟引入的法律基础,包括影响这一进程的关键欧洲文件和工具,如ETS或二氧化碳排放限额。脱碳背景已被作为欧洲实现低碳经济的路线图提出。在文章中提出了欧盟战略文件的主要假设,如为所有欧洲人提供清洁能源或欧洲绿色协议。Casus Silesia表明了煤炭地区在从煤炭转型过程中必须解决的基本问题。对于欧洲社会来说,欧盟委员会的新环境政策意味着加强减少温室气体排放的活动,并将经济转向低碳能源和技术。经济的脱碳是一个持续的过程,近年来势头不断增强。煤炭转型是一个巨大的挑战,尤其是对波兰来说。
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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 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-10-09 DOI: 10.46873/2300-3960.1324
S. Ignatiev, A. Sudarikov, A. Imashev
The paper reviews methods and trends of numerical modelling of geomechanical processes around underground mine excavations. The most rational method of determining the additional stresses caused by the mine excavations is chosen. Mathematical modelling was performed for excavations of various cross sections and different strength of rocks. The dimensions of the inelastic deformation zone around the mine excavations have been identified. The area of the total fracture zone around the excavation, as well as the area of the roof fracture zone are calculated. The results of the fracture zone modelling are presented both as coordinates and in a graphical form. To simplify application of the modelling results, dependency plots of the obtained parameters were created and analytical dependencies of the fracture zone parameters were identified. The SURFER and KOMPAS software packages were used as the graphic tools to visualize the modelling results.
本文综述了地下矿山开挖前后地质力学过程数值模拟的方法和发展趋势。选择了最合理的确定矿山开挖附加应力的方法。对不同断面、不同岩石强度的开挖进行了数学建模。确定了矿山开挖周围非弹性变形带的尺寸。计算了基坑周围总破裂带面积和顶板破裂带面积。裂缝带建模的结果以坐标和图形两种形式表示。为了简化建模结果的应用,建立了所得参数的依赖关系图,并识别了裂缝带参数的解析依赖关系。使用SURFER和KOMPAS软件包作为可视化建模结果的图形工具。
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引用次数: 2
Socio-ecological Analysis of Artisanal Gold Mining in West Africa: A Case study of Ghana. 西非手工金矿开采的社会生态分析——以加纳为例。
IF 1 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-09-30 DOI: 10.46873/2300-3960.1322
Richard Takyi, R. Hassan, Badr El Mahrad, Richard Adade
The surge in artisanal gold mining (AGM) activities and the associated environmental impact in Ghana have elicited several stakeholders' attempts to curb the problem. However, due to little understanding of the underlying issues, these efforts have been ineffective. This study aims to use a socio-ecological framework to analyze drivers of AGM activities, the environmental pressures, the state change, their impact on human welfare, and the management response as measures (DAPSI(W)R(M)) to the problem. Evaluate AGM's impact on Ghana's ability to achieve the United Nations Sustainable Development Goals (SDGs). Data were collected from relevant literature on the subject and analyzed with the DAPSI(W) R(M) framework. Esteem needs, food, acceptance and friendship, and self-actualization are the main drivers of AGM activities leading to environmental pressures, including abrasion, extraction of living and non-living resources, the introductionofnon-synthetic compounds, amongothers. State changes of the environment resulting from thepressures generated byhuman activitieswere changes in the land and forest cover (1.13%), topography (hills turned into flatland and undulating), and biota. Due to the state in the environment, water quality and availability, agriculture food production, fish yield, food safety, spiritual and cultural loss, death, injury, and health of gold miners and other stakeholders have been affected.
加纳手工金矿开采(AGM)活动的激增以及相关的环境影响引发了一些利益相关者试图遏制这一问题。然而,由于对潜在问题的了解很少,这些努力都是无效的。本研究旨在利用社会生态框架分析AGM活动的驱动因素、环境压力、状态变化、它们对人类福利的影响,以及作为措施(DAPSI(W)R(M))的管理响应。评估年度股东大会对加纳实现联合国可持续发展目标(SDGs)能力的影响。从相关文献中收集数据,并使用DAPSI(W) R(M)框架进行分析。尊重需求、食物、接纳和友谊以及自我实现是AGM活动的主要驱动因素,导致环境压力,包括磨损、生物和非生物资源的提取、非合成化合物的引入等。人类活动压力导致的环境状态变化是土地和森林覆盖(1.13%)、地形(丘陵变为平坦和起伏)和生物群的变化。由于环境状况、水质和可得性、农业粮食生产、鱼类产量、食品安全、精神和文化损失、死亡、伤害以及金矿工人和其他利益相关者的健康受到影响。
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引用次数: 9
Growth of invasive plant species communities as a substantial issue in post-mining land development 入侵植物群落的生长是采矿后土地开发中的一个重要问题
IF 1 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-09-28 DOI: 10.46873/2300-3960.1321
P. Olszewski
This article concerns the issue of the appearance and growth of invasive plant species in land degraded by hard coal mining as well as the repercussions of this process, particularly in the context of land reclamation. These species, such as e.g. Canadian goldenrod or Japanese knotweed, which nearly always form extensive and monocultural patches of vegetation, contribute to the displacement of both native species and those introduced as part of biological restoration. In 2015, the Central Mining Institute in Katowice prepared a land development concept for a part of the area of the former KWK Pary _ z mine in Dąbrowa G ornicza (Upper Silesian Industrial Region e Poland), based on its resources and potential, encompassing the “Jadwiga” dump and its vicinity. The presented actions scenarios did not fully factor in the issue related to the growth and control of invasive plant species. Studies of the growth of invasive species communities, conducted from 2015 to 2019 with the use of UAV (unmanned aerial vehicles), revealed the significant propagation of the Japanese knotweed Polygonetum cuspidati (Moor 1958) Th. Müller et G€ ors 1969 ex G€ ors 1974 association as well as the Canadian goldenrod Solidago canadensis community. Their elimination increases the cost of the reclamation by 18%.
本文讨论了硬煤开采退化土地上入侵植物的出现和生长问题,以及这一过程的影响,特别是在土地复垦的背景下。这些物种,例如加拿大黄花或日本结叶草,几乎总是形成广泛的单一植被斑块,有助于取代本地物种和作为生物恢复的一部分引入的物种。2015年,卡托维兹的中央矿业研究所根据其资源和潜力,为位于Dąbrowa G ornicza(波兰上西里西亚工业区)的前KWK党z矿山的一部分地区制定了土地开发概念,包括“Jadwiga”垃圾场及其附近地区。所提出的行动方案没有充分考虑到与入侵植物物种的生长和控制有关的问题。2015 - 2019年,利用无人机(UAV)对入侵物种群落的生长进行了研究,发现日本结叶蓼(Polygonetum cuspidati) (Moor 1958)的繁殖显著。ms . ller et G - ors 1969前G - ors 1974协会以及加拿大一枝黄花加拿大社区。它们的消失使回收成本增加了18%。
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引用次数: 0
The factors impacting the incorporation of the Sustainable Development Goals into Raw Materials Engineering Curricula 影响可持续发展目标纳入原材料工程课程的因素
IF 1 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-09-15 DOI: 10.46873/2300-3960.1320
D. Damigos, G. Valakas, A. Gaki, K. Adam
It is widely recognised and acknowledged that the mining industry, if properly operating and managed, has the potential to positively contribute to “The 2030 Agenda for Sustainable Development”. In this direction, the Raw Materials (RM) engineering education possesses a crucial role, given the need to instil in tomorrow's mining engineers the sustainability principles. This paper explores the educational needs of the Greek RM sector and the factors constituting the RM whole value chain SDGs-education-innovation eco-system. The research follows a two-stage focus group approach. First, the perceptions, opinions and beliefs of invited stakeholders were explored in the context of semistructured interviews. Then, the stakeholders were requested to identify the main components of the RM-SDGs-education-innovation eco-system using the Fuzzy Cognitive Maps (FCMs) method. According to the results, the incorporation of the sustainable development (SD) principles in the educational process is considered a priority. However, only a few courses provide the basics of SD principles in the Greek RM engineering curricula, so far. Further, the FCM approach offered the means to explore the factors identified by the stakeholders as pivotal in the RM-SDGs-educationinnovation system and the interactions between them.
人们普遍认识到,采矿业如果经营和管理得当,有可能为“2030年可持续发展议程”作出积极贡献。在这个方向上,原材料(RM)工程教育具有至关重要的作用,因为需要向明天的采矿工程师灌输可持续性原则。本文探讨了希腊RM行业的教育需求,以及构成RM全价值链可持续发展目标-教育-创新生态系统的因素。这项研究采用了两个阶段的焦点小组方法。首先,在半结构化访谈的背景下,探讨被邀请的利益相关者的看法、意见和信念。然后,要求利益相关者使用模糊认知图(fcm)方法识别rm - sdgs -教育-创新生态系统的主要组成部分。根据结果,将可持续发展(SD)原则纳入教育过程被认为是一个优先事项。然而,到目前为止,只有少数课程在希腊RM工程课程中提供SD原则的基础知识。此外,FCM方法提供了探索利益相关者确定的在rm - sdgs -教育创新系统中起关键作用的因素及其相互作用的手段。
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引用次数: 2
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Journal of Sustainable Mining
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