煤炭资源整合中矿业权流转的公私冲突及调适

矿业权兼具物权的私法属性与行政许可的公法属性,流转中存在国家干预与私人自治的内在张力和冲突。在煤炭资源整合背景下,这种冲突表现为:以阴阳合同的方式进行矿业权转让,名为整合、实为挂靠;登记权利人与实际权利人分离交易;合同解除权行使与整合政策冲突,强制关闭在采矿许可证有效期限内的煤矿等。调适路径在于:理论层面,澄清矿业权的法权属性,突出其物权性质;立法层面,调整涉矿业权的法律法规中限制矿业权流转的规范安排;司法层面,合理定位公法与私法在矿业权流转中的调整范围,融贯公私法共治并存的模式。从长远看,应借助《矿产资源法》修订的契机建立现代矿业制度。     

古交矿区奥陶系顶部隔水关键层厚度研究

 目前,越来越多的华北矿井进入深部开采阶段,太原组下组煤开采受奥陶系岩溶水害威胁越来越严重。利用奥陶系顶部隔水关键层解放底板受奥陶系水压威胁太原组下组煤正在成为华北矿井水害防治的研究热点。古交矿区已经开始下组煤开采,进入奥陶系岩溶水承压区。本文以古交矿区T矿为例,通过补充钻探、抽水试验、井下物探、岩矿测试等手段与方法分析了T矿奥陶系顶部峰峰组和上马家沟组岩溶发育特征,研究了奥陶系顶部隔水关键层厚度。研究表明,古交矿区T矿峰峰组上段上部近30m厚的古风化裂隙充填带和峰峰组下段约70m厚的第一泥灰岩石膏层可分别作为防峰峰组局部中等富水区和上马家沟组中-上部第二、三含水层组突水的隔水关键层。     

Application Study on Visible Human Computer Interaction System of Association Rule

With COM, VB and VC, we develop a visual human computer interaction system, which is used to mine association rules. It can mine association rules from the database which is created by Access and SQL server, as well as the text mode. With the interaction interface, user participates in the process of data mining, making the system mine the satisfying rules.     

Numerical Modeling of Cemented Mine Backfill Deposition

In current underground mining practice, it is common to use tailings, without added cement, to fill mined-out voids (“stopes”). If fine-grained tailings are used, the high placement rates and low permeability can often result in undrained loading conditions and, hence, lower effective stress, when assessed in the conventional manner. Where cement is added, the cement modifies the consolidation characteristics in a number of ways, including increasing the strength and stiffness, reducing the permeability, and inducing volumetric changes associated with the hydration reactions leading to “self-desiccation.” As a result, conventional consolidation-analysis techniques are unsuitable for assessing the behavior. The one-dimensional mine-tailings-consolidation program (MinTaCo) has been modified, and renamed CeMinTaCo, to couple cement hydration with conventional consolidation analysis. The fundamental theory behind the modifications is presented. The model is used to undertake a sensitivity study, which highlights some of the important features of the behavior of cemented backfill, and shows how complex interactions between the various properties produce some outcomes that are counterintuitive.     

数据迁移工具的设计研究

数据迁移就是将数据从一种数据环境移入另一种数据环境中。它不仅仅是简单的数据搬家，还涉及到数据格式的转换。本文介绍了在Microsoft公司UDA技术基础上，利用SQL语句完成常用数据库数据间迁移的一般性工具的设计和实现流程。这一完整的数据流程如果定期发生，就可以频繁到实时数据转换或不频繁地每月为数据仓库进行更新，因此对于数据仓库的建立，以及后续的数据挖掘都有相当的实际价值，同时对于应用程序更新也具有一定意义。     

数据挖掘中聚类算法的比较研究

聚类是数据挖掘领域中的一个重要研究课题.本文首先综合提出评价聚类算法好坏的八个标准,然后在此标准基础上,对数据挖掘中的常用算法进行分类分析比较,并得出比较结果,以使人们在实际应用中能方便、快捷地找到最好的聚类算法以解决实际问题.     

高校教学质量评估数据挖掘系统的设计与实现

本文首先介绍了数据挖掘的相关概念以及挖掘技术在教学质量评价中的应用,并提出了高校教学质量评价数据挖掘系统的设计方案,最后利用Java技术实现系统,并对系统实现的关键技术予以阐述和总结了本系统的优缺点。     

Web数据挖掘技术及应用

Web数据挖掘技术在电子商务中的应用越来越广泛,已成为现代电子商务企业获取市场信息极为重要的工具。本文简要介绍了Web数据挖掘的定义等相关内容,并对Web数据挖掘技术在电子商务领域中的应用进行了阐述。     

Limits to foundation displacement of an extra high voltage transmission tower in a mining subsidence area

Given the background of a transmission tower erected on a particular mining subsidence area,we used finite element modeling to analyze the anti-deformation performance of transmission towers under a nu...     

Strategic mining options optimization:Open pit mining,underground mining or both

Near-surface deposits that extend to considerable depths are often amenable to both open pit mining and/or underground mining. This paper investigates the strategy of mining options for an orebody using a Mixed Integer Linear Programming(MILP) optimization framework. The MILP formulation maximizes the Net Present Value(NPV) of the reserve when extracted with(i) open pit mining,(ii) underground mining, and(iii) concurrent open pit and underground mining. Comparatively, implementing open pit mining generates a higher NPV than underground mining. However considering the investment required for these mining options, underground mining generates a better return on investment than open pit mining. Also, in the concurrent open pit and underground mining scenario, the optimizer prefers extracting blocks using open pit mining. Although the underground mine could access ore sooner, the mining cost differential for open pit mining is more than compensated for by the discounting benefits associated with earlier underground mining.