Bottleneck identification and ranking model for mine operations

Abstract

Mining has a long history of production and operations management. Considering the increasing complexity of reserves, declining metal grades, and worldwide price volatilities, mines have to operate more efficiently than ever. In recent years, companies have been adopting innovative solutions and technologies to reduce costs and remain competitive in the global market. Specifically, management of bottlenecks has been in the focus of the manufacturing industry for decades now. The mining industry has made significant advancements in process improvement tools using equipment, human, and asset tracking capabilities. However, to date, there is no holistic approach or system to identify and manage the bottleneck in the entire value chain of mining. This research proposes a new method to identify and rank the bottlenecks in a mine value chain. The method is applied in a coal mine and the results are presented in the case study.     

煤炭产业动态投入产出多目标优化模型

文章以煤炭产业的适度发展为出发点,在考虑中国经济发展速度与综合经济平衡的前提下,基于动态投入产出分析技术以及多目标规划理论建立了煤炭产业多目标动态投入产出优化模型.并根据各产业煤炭消耗变化规律提出了应用马尔科夫概型修订直接消耗系数的方法,同时应用计量经济学方法对中国未来十年的煤炭消耗量作出了预测,为准确求解该模型提供了依据.     

内蒙古化学史研究：Ⅵ.煤炭的最早应用

煤炭是一种重要的固体燃料与化学工业原料，煤炭的开发应用与化学、化工有密切的关系，内蒙古地区煤炭资源丰富，根据有关史料与出土文物推断，内蒙古地区早在１３世纪七十年代之前，已懂得用煤炭作燃料。     

煤岩坍塌的特殊性及钻井液对策

在煤层气钻井中,煤岩坍塌造成接单根困难、起下钻遇阻遇卡、蹩泵等事故和井下复杂。通过煤岩力学性能测试和结构构造特征分析,分析了煤岩失稳的特殊性及钻井液和其它因素的影响,确定了煤层钻井的钻井液技术对策,优选出钻井液体系及配方,应用表明钾铵聚合物钻井液能有效地防止煤岩井壁失稳。     

经济对煤炭的依赖与煤炭对经济的贡献分析

本文在全面分析了煤炭消费与国民经济发展关系的基础上，采用定量分析的方法，对近期我国经济对煤炭的依赖程度和煤炭对国民经济的贡献率、吨煤经济效益进行了计算分析。研究结果表明：从过去20多年来看，我国经济发展对煤炭的依赖度并没有发生根本性的变化；“十一五”期间，我国煤炭生产和主要用煤行业对GDP总量和增量的总贡献率分别为15％和18％左右。     

Wind,coal, and copper: the politics of land grabbing,counterinsurgency, and the social engineering of extraction

ABSTRACT

The multiplicity of violent techniques employed to impose land control and extraction remains under acknowledged. This article reviews research conducted between the years 2014 and 2018 and draws on three case studies: wind energy development in Mexico, coal mining in Germany, and copper mining in Peru. The idea of 'engineering extraction' is advanced through counterinsurgency to acknowledge the extent of extractive violence, arguing that the term ‘land grabbing’ is indeed a more appropriate term than ‘land deals’. Engaging with the land grabbing literature, the three cases seek to advance discussions around ‘the political reactions “from below”’ by emphasizing ‘insurrectionary’ positions with resistance movements fighting land deals and extractive projects. This is followed by offering a typology of ‘hard’ coercive techniques and ‘soft’ technologies of social pacification that surfaced in each case. The conclusion reflects on the social technologies of resource extraction, recognizing how social discord, ecological and climate crises are engineered and enforced.     

东北煤矿“特殊工人”的反日斗争

1931年九·一八事变后，日本侵略者占领了我国东北，疯狂掠夺煤炭资源，给煤矿工人带来了无穷的灾难，同时日本侵略者还公然违背国际法准则，将战俘和抗日根据地群众作为“特殊工人”运送到东北各煤矿从事奴隶式的苦役。战俘和抗日根据地群众不断掀起“反日斗争”，为东北各煤矿的解放做出了重大贡献。     

煤炭资源型城市可持续发展的思考——对贵州省盘县特区的实践考察

煤炭资源型城市曾是我国资源型城市发展的中坚力量。本文就我国煤炭资源型城市盘县特区发展面临的主要问题展开了探讨，提出要按照可持续发展的理念指导下，寻找煤炭资源型城市实现可持续发展之路。     

煤矿安全ERP系统的研究与开发

本文对实现CSERP系统进行了初步的探讨,引入科学的管理方法,将安全管理深入到作业层次,便于及时发现安全管理的薄弱环节。同时,对煤矿各种安全问题进行预警和监控以及对安全度的最佳成本进行测算等,为煤矿安全管理及决策提供指导。     

法制因素与近代开滦煤矿矿难的发生

近代开滦煤矿在其生产经营繁荣的背后,却是矿难频发、难以遏止,矿难造成的惨重伤亡更是让人触目惊心。矿业法律和制度是煤矿安全生产的重要保障,但中国近代的法律体系很不健全,法制环境也很不规范,所以并没有形成完整的矿业法规系统。这表现为:一方面,缺少关于矿业安全生产方面的法律制度;另一方面,即使制定了一些矿业法规,也不能全面严格地去执行。因此,无法可依、有法不依是近代煤矿存在重大隐患的首因,也成为导致近代开滦煤矿矿难发生的法制因素。